All about RAID 10 glued for you by GlueText™.com on June 18, 2009 at 22:10 EST

Glued on June 18, 2009 at 22:10 EST
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Dell PowerEdge 2950 performance

"(If I have some extra time, I might be able to run a few tests on linux just for comparison's sake) Test strategy: Make sure the RAID is giving reasonable performance: bonnie++ -d /u/bonnie -s 1000:8k time bash -c (dd if=/dev/zero of=bigfile count=125000 bs=8k sync) Now, I realize that the above are overly simple, and not indicative of overall performance, however here's what I'm seeing: Single 10K 300 GB drive - ~75 Mb/s on both tests, more or less RAID 10, 6 disks (3 sets of mirrored pairs) - ~117 Mb/s The RAID 10 numbers look way off to me, so my next step is to go test some different RAID configs. I'm going to look at a mirrored pair, and a striped pair first, just to make sure the setup is sane. Then, RAID 5 x 6 disks, and mirrored pair + raid 10 with 4. Possibly software raid, however I'm not very familiar with this on FreeBSD. Once I get the RAID giving me reasonable results (I would think that a raid 10 with 6 10k drives should be able to push 200 MB/s sustained IO...no?) I will move on to other more DB specific tests. A few questions: 1) Does anyone have other suggest" [1]

Quoted from
archives.postgresql.org/pgsql-perform... [Published: Wed, 9 Aug 2006 13:23:25 -0300 (ADT)] [1094 characters, 207 words] [score: 346]

Raid 10 or Raid 5 on Dell PowerEdge

"Raid 10 or Raid 5 on Dell PowerEdge . Hi. I sent this email to the list last week, but for some reason I never saw it show up on the list. I apologize if it appears twice now. We recently bought two Dell PowerEdge 2900 servers each with a 2.3 Ghz 5140 Xeon, 4 Gigs of RAM, 8 15k SAS drives, and a PERC 5/i raid controller with 256 megs of battery backed cache. Our database is more of an OLTP type, and everything I've read says that 10 would be better, but I thought I would test both 10 and 5. The other guys here wanted to run the Raid 5 with a hot spare, so the RAID 10 uses 8 disks a" [2]

Quoted from
archives.postgresql.org/pgsql-perform... [Published: Wed, 17 Jan 2007 11:57:55 -0400 (AST)] [589 characters, 125 words] [score: 301]

PowerEdge HDD/SCSI/RAID on Dell Community Forum | BoardReader

"If you were able to live with a 6 disks RAID 10 (instead of 8), you could create that volumes on the expansion backplane + side B of main backplane, this should be managed by the second controller on the... user's latest post: user's latest post: user's latest post: user's latest post: PE 2800 with three 72gb in Raid 5 array. I d like to add 2 drives that are mirrored, do not want them part of the Raid 5 configuration. I m assuming this should be relatively straightforward - add the drives and use the utility to mirror without affect the raid array? Just want to confirm that. Also, I don t believe this server has the most updated bios or Perc drivers. Can someone point me to" [3]

Quoted from
boardreader.com/fp/Dell_Community_For... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:46 GMT] [685 characters, 129 words] [score: 105]

RAID 5 beats RAID 10* - bytes*

"member login: lost password? RAID 5 beats RAID 10 RAID 5 beats RAID 10 Can I get some feedback on these results? We were having some serious IO issues according to PerfMon so I really pushed for RAID 10. The results are not what I expected. I have 2 identical servers. Hardware: PowerEdge 2850 2 dual core dual core Xeon 2800 MHz 4GB RAM Controller Cards: Perc4/DC (2 arrays), Perc4e/Di (1 array) PowerVault 220S Each Array consisted of 6-300 GB drives. Server 1 = Raid 10 3, 6-disk arrays Server 2 = Raid 5 (~838 GB each) 3, 6-disk arrays (~1360 GB each) Test Winner % Faster SQL Server - Update RAID 5 13 Heavy ETL RAID 5 16 SQLIO - Rand Write RAID 10 40 SQLIO - Rand Read RAID 10 30 SQLIO - Seq Write RAID 5 15 SQLIO - Seq Read RAID 5 Mixed Disk" [4]

Quoted from
bytes.com/groups/ms-sql/486087-raid-5... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:44 GMT] [749 characters, 148 words] [score: 596]

VMware Communities: Setting up first ESXi VM on Dell PowerEdge 2950 6x300GB, RAID?, Block

"Kev RAID 10 Capacity: (Size of Smallest Drive) * (Number of Drives) / 2 . According to this I would have 300GB * 6 / 2 = 900GB....Wouldn't I have 900GB to play with? And 256GB VMDK seems too small. If I increase the block size can I get more capacity? Yes, you would have 900 GB. The 256 GB limit is for a single VMDK file, so in your case you could fit 3 such virtual disks on the host if you went with RAID 10. You only need to change the block size if a VM will need a VMDK of greater than 256 GB. From what I've read the" [5]

Quoted from
http://communities.vmware.com/thread/168215 [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:47 GMT] [525 characters, 112 words] [score: 148]

Dell PowerEdge 2950 Ratings & Reviews - Spiceworks Community

"Running Dual Quads Intel Xeon E5310 1.60GHz with 6GB RAM and 4 750GB SATA drives in a RAID 10 configuration. We are using this as a general purpose file server. It has been up and running for about a year with no problems. Very stable and reliable running Windows 2003 File Server. This was a very good buy. I must say that we are a Dell shop. And with the exception of a few Inspiron laptops we have not had a single Dell hardware failure on Optiplex and Latitude workstations and PowerEdge servers. Some have been going for 5 years with no problems. . We have 3 of these servers. Very well made. Price isn't to bad as well. We used to use hp nas'" [6]

Quoted from
http://community.spiceworks.com/product/1775 [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:37 GMT] [649 characters, 125 words] [score: 79]

Dell PowerEdge R900 freezes / locks with Windows Server 2008 - Topic Powered by Eve For Enterprise

"this driver is used for the Dell PERC 6/i to run the local hard disk in the server (we had a RAID 10 layout). The PERC is made for Dell by LSI Logic Corporation.. . I have asked Microsoft to remove the Dell R900 for Windows 2008 from the Windows Server Catalog .. . We have spent many weeks working with Dell to fix this problem but they still have not come back with a fix. LSI has to rework the drivers. In the mean time Dell said to change the control but we have reinstalled under Windows Server 2003 and the servers are looking happy.. . As anybody eles had this problem with R900 / Win 2008? Haven't to be honest but just started using 2" [7]

Quoted from
episteme.arstechnica.com/eve/forums/a... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:46 GMT] [644 characters, 127 words] [score: 74]

Solaris on x86 - Solaris 10 on Dell PowerEdge 2950

"I was using RAID-10 and made a 1.7TB container, I could not install. Made a 300GB 1:1 mirror, then a RAID 10 1.3TB container. Works fine. Same hardware, same disks. Just had to make two logical containers. This is a long standing bug, as are: - UFS filesystem greater than 1TB force cluster sizes of 1MB, jumping from 8k to 1MB with no ability to do anything in between - A lot of tools that sun provides fail when GUID is used to facilitate large volumes on solaris 10. - SunVTS fails when GUID large-volumes are present with the following: 07/12/08 14:50:03 hn SunVTS7.0ps2: VTSID 8065 Disk.disktest.FATAL c0t1d0p0:" [8]

Quoted from
forums.sun.com/thread.jspa?threadID=5... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:46 GMT] [619 characters, 108 words] [score: 111]

NetBSD Problem Report #34725: aac driver stops reponding after 10 seconds of activity

"aac0 at pci3 dev 9 function 0: Dell CERC SATA RAID 1.5/6ch aac0: interrupting at ioapic2 pin 0 (irq 11) aac0: i80303 at 100MHz, 64MB mem (48MB cache), optional battery not installed aac0: Kernel 4.1-0 [Build 7417], Monitor 4.1-0 [Build 7417], S/N 2d2e5 aac0: Controller supports: 1097c WCACHE,DATA64,HOSTTIME,RAID50,WINDOW4GB,... ld0 at aac0 unit 0: RAID 10 ld0: 467 GB, 61022 cyl, 255 head, 63 sec, 512 bytes/sect x 980334080 sectors Same problem with 3.0.1, the amd64 port complains about some init of a structure (seems to be a pr about that already) How-To-Repeat: Try to write something to a mounted volume. Fix: Release-Note: Audit-Trail: Responsible-Changed-From-To: port-i386-maintainer- briggs Responsible-Changed-By: briggs@netbsd.org Responsible-Changed-When: Fri, 06 Oct 2006 01:08:05 +0000 Responsible-Changed-Why: I've already got aac(4) work on my plate. From: Allen Briggs briggs@netbsd.org To: gnats-bugs@NetBSD.org Cc: port-i386-maintainer@netbsd.org, gnats-admin@netbsd.org, netbsd-bugs@netbsd.org Subject: Re: port-i386/34725: Device driver for aac raid controll" [9]

Quoted from
http://gnats.netbsd.org/34725 [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:46 GMT] [1093 characters, 143 words] [score: 104]

Jason Sares is a Giant Dork » Linux Quick Tip - Benchmark Disk Performance

"- Dell PowerEdge 840 (tower) Areca ARC-1110 controller (JBOD mode) 4 Western Digital 500 GB SATA, Linux Software RAID 10 - Timing buffered disk reads: 404 MB in 3.01 seconds = 134.13 MB/sec . - Dell PowerEdge 840 (tower) Areca ARC-1110 controller 4 Western Digital 500 GB SATA, RAID 5 - Timing buffered disk reads: 666 MB in 3.01 seconds = 221.36 MB/sec . - Dell PowerEdge 2950 Perc 5/i controller 4 Western Digital 500 GB SATA, RAID 5 - Timing buffered disk reads: 346 MB in 3.00 seconds = 115.21 MB/sec . I used the public domain I/O test program named bonnie a few days ago. Its easy to install/compile and execute and has reasonable results. Below is an exa" [10]

Quoted from
jason.giantdorks.org/2008/12/22/linux... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:48 GMT] [662 characters, 121 words] [score: 94]

Dell PERC RAID controller and RAID 10

"Dell PERC RAID controller and RAID 10 . --- SEARCH TAGGING --- TAG000000000000000 - SEANRYAN TAGA00000000000001 - Public TAGB00000000000001 - Main Area TAG300100000000000 - Hardware, I/O sub-system --- SEARCH TAGGING --- Subject: Dell PERC RAID controller and RAID 10 Hardware: Dell Power Edge Server line (I.E. PE 1650, PE2550, PE8400...) Creation Date: 03-18-04 Last Revision Date: References: Dell OpenManage Array Manager 2.7 User's Guide , Adaptec On-line help, and various forum postings by various authors. This is in reference to the SCSI RAID controllers that Dell ships in their" [11]

Quoted from
kb.dbatoolz.com/tp/376.dell_perc_raid... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:44 GMT] [590 characters, 89 words] [score: 272]

Kendal Van Dyke: Disk Performance Hands On, Part 4: RAID 1 Performance

"Partition Offset Allocation Unit Size Dell PowerEdge 2950 Based on the results from my RAID 10 and RAID 5 tests I chose to focus on a 64 KB allocation unit. In addition to 32 KB and 64 KB offset values I also tested a 1024 KB offset to see if a larger offset made a difference. As with previous tests I ll present the results for 8 KB random reads and writes, the two operations SQL performs on data files most of the time. . Here s what 8 KB random reads look like: . . And here s what 8 KB random writes look like: . . For both reads and writes the numbers are so close together that there s no practical difference between them. I ll point out that Test Harness #1 was using (somewhat) ol" [12]

Quoted from
kendalvandyke.blogspot.com/2009/02/di... [Published: Mon, 15 Jun 2009 22:24:10 GMT] [692 characters, 139 words] [score: 89]

Kendal Van Dyke: Disk Performance Hands On, Part 5: RAID 10* vs. RAID 5*

"In part 2 and part 3 of this series I looked at RAID 10 and RAID 5 performance, respectively. Now I ll show how the two rate against each other. For this comparison I ll look at all three of my test harnesses for this post (view the test harness specifics here). For all comparisons I am using a 64 KB RAID stripe with a 64 KB partition offset and a 64 KB allocation unit size. As with my previous posts I ll focus on OLTP data activity (8 KB random reads\writes). . Test Harness #1: Dell PowerEdge 2950 These tests were performed using 4 physical SCSI drives with 8 threads against a 64 GB data file at an I/O queue depth of 8. . Here s w" [13]

Quoted from
kendalvandyke.blogspot.com/2009/02/di... [Published: Mon, 15 Jun 2009 22:24:10 GMT] [640 characters, 128 words] [score: 201]

[CentOS] help...about centos4.3 and dell pow...

"Balsmeier karl at klxsystems.net wrote: Is he trying to establish a hardware-based RAID 10 on his Dell Poweredge server? That looked like part of what he wanted to do. If so, and he is using 4 disks, take two of them and create RAID 1, and do the same with the other 2, then when those are created, choose new RAID, and select raid 0, select both RAID 1's as members, and once done, he will have RAID 10. That's how we did it on our existing Poweredge servers, -we also are able to monitor them using Nagios and a custom script we wrote that works with the AFACLI tool, which I can send you the download info for. But let me know, maybe I read his post slightly wrong in spanish... Karl I am not good" [14]

Quoted from
lists.centos.org/pipermail/centos/200... [Published: Wed, 13 Aug 2008 11:34:55 GMT] [701 characters, 137 words] [score: 188]

PERC 5/E SAS RAID in Dell PowerEdge 1950/295...

"The box came configured as a RAID 10 across all 6 disks. It appeared to do mirroring first, then striping. I ran the following: time bash -c (dd if=/dev/zero of=bigfile count=125000 bs=8k sync) this returned ~117 MB/s, which seems a bit slow for 6 spindles. I also ran bonnie++ with similar results. Keep in mind just 1 of these SAS drives easily pumps out a sustained 75 MB/s read/write rate. 2. Thinking there might be a problem with the controller and complex RAID (this was discussed the Postgres performance mailing list), I tried a RAID 5 and RAID 0 config. This resulted in the following results" [15]

Quoted from
lists.freebsd.org/pipermail/freebsd-h... [Published: Wed, 30 Aug 2006 18:32:41 GMT] [603 characters, 106 words] [score: 110]

PE 2800 - PERC 4e/Di - RAID 10* don't work? ...*

"PE 2800 - PERC 4e/Di - RAID 10 don't work? Bahadir_Kiziltan@D2.com.tr bahadir_kiziltan at D2.com.tr . Wed Jan 26 05:17:01 CST 2005 . . RAID 10 is only created by spanning RAID 1 LUNs. Firstly, you should create two separated RAID 1 Logical Unit. Then highlight LUNs and select span. If you highlight 4 drives at the same time, controller presents only the available configuration options that are possible to construct, as you said RAID0 and RAID5. -----Original Message----- From: linux-poweredge-admin at dell.com [mailto:linux-poweredge-admin at dell.com] On Behalf Of Dirk Wellmann Sent: Wednesday, January 26, 2005 12:53 PM To: linux-p" [16]

Quoted from
lists.us.dell.com/pipermail/linux-pow... [Published: Mon, 25 Apr 2005 16:07:18 GMT] [641 characters, 99 words] [score: 262]

Xen initrd and RAID 10

"Xen initrd and RAID 10 Patrick_Boyd at Dell.com Patrick_Boyd at Dell.com . Thu Jun 8 16:23:59 CDT 2006 . . Sorry I don't have any experience with it SLES 9 but I can tell you that it works prefectly right out of the box on SLES 10. So if its possible I just recommend waiting for SLES 10 to be released. Patrick Boyd Dell Storage Software Engineer (512)728-3182 ________________________________ From: linux-poweredge-bounces at dell.com [mailto:linux-poweredge-bounces at dell.com] On Behalf Of Eric E Sent: Thursday, June 08, 2006 2:48 PM To: linux-poweredge-Lists Cc: jbm at redpathip.com Subject: Xen initrd an" [17]

Quoted from
lists.us.dell.com/pipermail/linux-pow... [Published: Fri, 16 Jun 2006 20:34:03 GMT] [614 characters, 98 words] [score: 193]

Dell Manager: Dell™ PowerEdge™ Expandable RAID Controller 4/SC and 4/DC User's Guide

"RAID 10 requires at least four physical drives. . RAID 50 requires at least six physical drives. . Stripe Size specifies the size of the segments written to each drive in a RAID 1, 5, or 10 logical drive. You can set the stripe size to 2 KB, 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB. The default is 64 MB for PERC 4/SC and PERC 4/DC. . A larger stripe size provides better read performance, especially if your computer does mostly sequential reads. However, if you are sure that your computer does random read requests more often, select a small stripe size. . Write Policy spe" [18]

Quoted from
lurch.ncsa.uiuc.edu/Docs/Dell/Perc4sc... [Published: Wed, 13 Aug 2003 19:02:01 GMT] [580 characters, 112 words] [score: 104]

'RE: PE6850 recommendations' - MARC

"David -----Original Message----- From: linux-poweredge-bounces@dell.com [mailto:linux-poweredge-bounces@dell.com] On Behalf Of Mad Unix Sent: Monday, February 12, 2007 1:55 AM To: Linux-PowerEdge@dell.com Subject: PE6850 recommendations I want to build a Server using PoewrEdge 6850 running raid 5 or raid 10 (didn't decide till now about raid config)! the server will be a web server with DB running RHEL4 and Oracle, please can you tell me if my proposed technical spec would be okay and run smoothly with Redhat, such as Hard Drive Configuration,Hard Drive Back plane,Primary Controller,Primary Hard Drive, RAID10, RAID5, No. of the hardisks and volume..etc DELL PowerEdge 6850 Technical Specification Processors New Dual-Core Intel(r) Xeon(r) MP processors, Dual Intel Xeon processor upgradeable to Quad on motherboard; with the following options of processor speeds* Dual Core Intel(r) Xeon(r) Processor 7140M, 3.4GHz, 16MB L3 Cache, Front Side Bus 800MHz front side bus Chipset Intel (r) 8501 Memory 16GB DDR2 SDRAM expandable up to 64GB Hard" [19]

Quoted from
marc.info/?l=linux-poweredge&m=117167... [Published: Fri Jun 19 02:12:49 2009] [1050 characters, 153 words] [score: 99]

RE: PERC 5/E SAS RAID in Dell PowerEdge 1950/2950: msg#00023 os.freebsd.devel.hardware

Quoted from
osdir.com/ml/os.freebsd.devel.hardwar... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:49 GMT] [601 characters, 106 words] [score: 110]

Disk Performance Hands On, Part 5: RAID 10* vs. RAID 5 | SQLServerPedia*

"In part 2 and part 3 of this series I looked at RAID 10 and RAID 5 performance, respectively. Now I’ll show how the two rate against each other. For this comparison I’ll look at all three of my test harnesses for this post (view the test harness specifics here). For all comparisons I am using a 64 KB RAID stripe with a 64 KB partition offset and a 64 KB allocation unit size. As with my previous posts I’ll focus on OLTP data activity (8 KB random reads\writes). . Test Harness #1: Dell PowerEdge 2950 These tests were performed using 4 physical SCSI drives with 8 threads against a 64 GB data file at an I/O queue depth of 8. . He" [21]

Quoted from
sqlserverpedia.com/blog/sql-server-20... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:49 GMT] [640 characters, 123 words] [score: 201]

Documentation

"For example, when a RAID 10 logical drive consisting of two spans of two drives each can sustain a drive failure in each span and be a degraded logical drive. The RAID controller has the fault tolerance to undergo a single failure in each span without compromising data integrity or processing capability. . The RAID controller provides this support through redundant arrays in RAID levels 1, 5, 10 and 50. The system can still work properly even with a single disk failure in an array, though performance can be degraded to some extent. . To recover from a degraded logical drive, rebuild the failed drive in each array. Upon successful completion of the rebuild process, the logical drive state changes f" [22]

Quoted from
support.dell.com/support/edocs/storag... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:49 GMT] [707 characters, 121 words] [score: 117]

The Future of Storage - Brought to you by Dell iSCSI & the Techdirt Insight Community

"I pretty much knew that any physical box that was currently RAID 10, would be RAID 10 as a VM. What I had to decide was if I would just go RAID 10 across the board. Many physical machines were RAID 5, but virtualization adds its own bit of overhead, and there’s never anything wrong with boosting performance on anything. It really wasn’t cost prohibitive in buying the physical disks, but it did present a problem in maxing the physical disk count per controller a little quicker than I liked. Also, my IOPS per $$$ looked better with going all 10, but again, it was going to lead to bringing in additional controllers to support the number" [23]

Quoted from
http://thefutureofstorage.com/ [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:50 GMT] [646 characters, 117 words] [score: 237]

Dell PowerEdge Expandable RAID Controller 4/Di User's Guide

"You can span two or more contiguous RAID 1 logical drives into a RAID 10 array, and two or more contiguous RAID 5 logical drives into a RAID 50 array. . For two arrays to be spanned, they must have the same stripe width (they must contain the same number of physical drives) and must be consecutively numbered. . For example, assuming array 2 contains four hard drives, it can be spanned only with array 1 and/or array 3, and only if arrays 1 and 3 also contain four hard drives. If the two criteria for spanning are met, PERC 4/Di automatically allows spanning. If the criteria are not met, the Span setting makes no difference for the current logical drive. Highlight a spanning option and p" [24]

Quoted from
www.cs.uwaterloo.ca/~brecht/servers/d... [Published: Tue, 18 Feb 2003 22:46:50 GMT] [694 characters, 127 words] [score: 106]

Dell PowerEdge 2650 Server - Nothing Exciting, but Reliable - Dell PowerEdge 2650 (2650-dqxn631) Server - Epinions.com

"RAID 10 - RAID 10 is not one of the original RAID arrays. It is basically a set of disk mirrors that have a stripe across it. So it is RAID 0 across a set of RAID 1 drives. You get extra protection as each of the disks in the stripe is mirrored. You get some speed improvement but you also lose half of your drives. As you can see, you have a lot of options available to you in your hard drive/storage selections. What is right for you will depend on your needs. In our case, the company that selected the drives opted for RAID-5 with hot-swap spare. Our data is relatively safe and we have good speed wi" [25]

Quoted from
http://www.epinions.com/content_163857993348 [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:53 GMT] [605 characters, 120 words] [score: 186]

Perc 4/di Raid 10* bigger drive Array question : DELL, Poweredge, 2600, Perc 4/Di*

"Whats the best way to replace these 4 74gig drives in RAID 10 with 4 matching bigger drives without having to move data around etc. THis poweredge 2600 only has one free Drive slot. Also this Array is not the Boot drive. theres another raid 5 array in this server server with the OS (windows 2003)View the Solution FREE for 7 Days Title . At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one. . Start your 7-day fre" [26]

Quoted from
www.experts-exchange.com/Hardware/Ser... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:53 GMT] [573 characters, 100 words] [score: 180]

Hard Drive Recovery Group | Dell PowerEdge RAID Data Recovery

"24 Hour RAID Repair RAID 5 Data Recovery RAID 10 Data Recovery SAN Tape Recovery RAID System Repair SNAP Server Data Recovery RAID Failure Recovery SAN Data Recovery RAID Configurations Defined RAID Drive Recovery SCSI Data Recovery RAID Tape Recovery LTO Recovery RAID 5: Doomed? RAID Manufacturers RAID File Restoration Exchange 5.5 Data Recovery RAID Drive Repair RAID Hard Drive Failure RAID Disk Recovery Dell PowerEdge Data Recovery Repair Your RAID . RAID Data Recovery FAQ Repair Hard Drive Why HDRG? Packaging Instructions Hard Disk Data Recovery Hard Drive Data Recovery SQL Database RecoveryMS Exchange Data Recovery Oracle Disaster Recovery Hard Drive Recovery Disaster Recovery Clean Room Site MapNotebook Data Recovery Hard Drive Failure Exchange Database Recovery Testimonials" [27]

Quoted from
www.harddriverecovery.org/raidcenter/... [Published: Fri, 12 Jun 2009 21:14:48 GMT] [793 characters, 118 words] [score: 220]

Inherited a Dell PowerEdge 2800 from work today, no clue what I'm doing - [H]ard|Forum

"But for harddrive performance? Oh man, you could have some awesome Raid 10 setup with that or something. You're looking at $2000-2500 for the harddrives alone if you could sell them top dollar. That whole system for $2000-2500 would be very cool (The rest is only worth a couple hundred really anyway). Hmm, do what you want with it. For music, I'd pick quieter, less power consuming, larger harddrives. The Dell 2800 here is something you'd want for SQL server or something I'd imagine __________________ CM Centurion 5, Antec EA500, ABIT IP35 Pro, Zalman 9500, Intel C2D E6400 (400x8=3.2GHz), eVGA 9800GTX, Corsair XMS2 2x1GB DDR2" [28]

Quoted from
www.hardforum.com/showthread.php?t=13... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:25 GMT] [633 characters, 105 words] [score: 76]

Measuring Disk Performance using bonnie++

"JetStor 3, RAID 10) 24G 52767 99 96015 18 29781 7 33038 82 98870 11 282.7 0 V20Z-c (ext. JetStor 3, RAID 10) 24G 51469 97 109988 21 35997 8 21279 57 90992 11 283.9 0 V20Z-d (ext. JetStor 3, RAID 5) 24G 52586 98 101945 21 34940 8 32388 87 86455 10 278.1 0 V20Z-d (ext. JetStor 3, RAID 10) 24G 49727 93 73764 14 26474 6 28012 77 61675 8 379.7 0 V20Z-e (ext. Sun J4400 RAID 5) 5G 38992 94 212198 50 73426 29 44046 98 381799 45 533.0 2 V40z (int. SCSI) 23G 39827 88 55703 21 27903 8 16638 46 65353 9 200.2 0 V440 (int. SCSI) 16G 32918 97 57152 38 23289 26 34112 99 96554 41 244.7 2 X4500-a (int. 1TB drive,ufs) 32G 73104 77 65851 33 20754 10 6" [29]

Quoted from
http://www.hps.com/~tpg/notebook/bonnie.php [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:55 GMT] [640 characters, 137 words] [score: 260]

dell poweredge & perc battery learning cycle | MySQL Performance Blog

"I tested it on Dell PowerEdge R900 with RAID 10 in WriteThrough mode to emulate absence of BBU. With cfq to noop solved their InnoDB IO problems. I ran tpcc scripts against XtraDB on our Dell PowerEdge R900 server (16 cores, 8 disks in RAID10, controller Perc/6i with BBU) to compare cfq, deadline, noop and anticipatory ( I ve been involved in troubleshooting Dell Poweredge 2850 system running RAID5 using by PERC4 (LSI Logic megaraid) controller. Dell was prompt to ship replacement hard provide you with such feature. Happily Dell Bios has little option which allows performing hardware with go" [30]

Quoted from
www.mysqlperformanceblog.com/?s=dell+... [Published: Dynamic Content on Fri, 19 Jun 2009 02:12:57 GMT] [599 characters, 100 words] [score: 73]

Forum OpenACS Q&A: OT: Dell PowerEdge RAID 10* Configuration*

"Forum OpenACS Q&A: OT: Dell PowerEdge RAID 10 Configuration . Request notifications I have some questions regarding a Dell 2650 configuration that I am considering, and I have yet to find someone at Dell that can answer them. Since I know several people here are running Dell servers, I was hoping some of you could enlighten me.. I am considering purchasing a PowerEdge 2650, 2x2.8GHz, 4GB RAM, with five 73 GB SCSI 320 HDDs, and I want to configure it as RAID 10 with four disks, having one hot spare. I am going to request a PERC4-DC RAID controller (LSI card, dual channels, 320MB/sec, 128 MB" [31]

Quoted from
www.openacs.org/forums/message-view?m... [Published: Dynamic Content on Fri, 19 Jun 2009 02:13:10 GMT] [597 characters, 106 words] [score: 262]

Forum OpenACS Q&A: Re: OT: Dell PowerEdge RAID 10* Configuration*

"Forum OpenACS Q&A: Re: OT: Dell PowerEdge RAID 10 Configuration . What are you doing that makes you think you need RAID 10 rather than RAID 1? I doubt that either Oracle or PostgreSQL can max out a nice fast SCSI drive doing INSERT or UPDATE operations, and the whole point on SELECT commands is to have enough RAM to cache enough of your DB that disk reads are rare (and when you do have to read from disk, each drive has its own cache as well).. If you're spooling video to the machine in real-time that's a different story ... One of the sites will require batch inserting/upd" [32]

Quoted from
www.openacs.org/forums/message-view?m... [Published: Dynamic Content on Fri, 19 Jun 2009 02:13:15 GMT] [582 characters, 109 words] [score: 255]

RE: RAID on RedHat 3 ES

"2 disks) Raid 1 (mirror): same I/O as single disk, fault tolerant (2 disks) Raid 5 (stripe + parity): high read I/O, med write I/O, fault tolerant (min 3 disks) Raid 10 (mirror + stripe) : high overall I/O, same fault tolerance as raid 1. (most expensive $/GB) For a mail server, assuming you are not going to host a ton of users on it in general RAID 1 serves best (given that you only have 2 drives). If you can fork out money for 2 or 3 more drives I would go RAID 5 + 1 spare, maximizing fault tolerance and useable disk space. Stripe is a definite no if you care about the uptime of the system and recoverability from a disk failure without having to resort to tape backups etc. -T Drives will be around 2 x 36 Gbyte so not too huge either. Regards Chris -----Original" [33]

Quoted from
www.redhat.com/archives/redhat-list/2... [Published: Thu, 19 Aug 2004 21:54:39 GMT] [774 characters, 150 words] [score: 133]

Hardware Today: Bolstering Benefits for Benelogic

"Unisys technicians improved disk throughput by adding an EMC CX 500 array with a RAID 10 configuration for SQL Server production data and tuning the Dell PowerEdge 6650 boxes. Result: Unisys pushed up the processor utilization rate from 25 percent processor utilization at peak load to 75 percent and tripled the query and transaction rates. . "Unisys was interested in solving our problems systemically, not just selling us one of its own boxes," says Miller. "They were eager to optimize our Dell servers." . >> Migration and Future Plans . . . . Hardware Articles Archives . . Search: ." [34]

Quoted from
www.serverwatch.com/hreviews/article.... [Published: Dynamic Content on Fri, 19 Jun 2009 02:13:00 GMT] [591 characters, 100 words] [score: 71]

Managed Enterprise Servers from ServInt

"Dell PowerEdge 2950 4 x 146 GB SAS HD in Hardware RAID 10* 4 GB 667 MHz FB-DIMM Memory 6.5 TB Monthly Transfer . Dual Quad Core Xeon L5410 8 Total 2.33 GHz Cores Dual 1333 MHz Front-side Bus (FSB) 4 x 6 MB Shared L2 Cache 190 GB available disk space 256 MB HW RAID Cache Hot-Swap Drives CentOS 5 Operating System 4 IP Addresses Unlimited Domains and User Accounts FREE Virtuozzo Power Panel FREE nightly backups FREE cPanel or Plesk 9 Available [details]$399 Setup . $599 monthly . Features Upgrades and Options * Usable drive space shown in package description. See FAQ for further details. . Dell PowerEdge 2950 4 x 146 GB SAS HD in Hardware RAID 10* 8 G" [35]

Quoted from
http://www.servint.net/v_dedicatedservers.php [Published: Dynamic Content on Fri, 19 Jun 2009 02:13:00 GMT] [657 characters, 123 words] [score: 150]

BESR 8.0.3 Doesnt See Hard Drives: Dell Poweredge 2970 | Symantec Connect

"Has anyone come accross the following issue. I tried to apply an image created with BESR onto a new dell server: (Poweredge 2970) Perc 5/i Raid 10 machine but SRD doesnt see the hard drives. Initially I figured it was the driver for the perc 5/i, so I just loaded the driver but that didnt work. . . I have created two partitions on the machine and loaded windows server 2003 on the machine. Installed BESR 8.03 and created a recovery disk .iso for the machine and tried to boot that version of the recovery disk. Still no hard drives. Since windows 2003 server is on the machine and I have two partitions, I dont see why the SRD wont see the drives. I had read articles claiming it was because the raid configuration needed to be setup, but since I have installed Windows 2003 and have two partitions I dont think blowing away the raid a" [36]

Quoted from
www.symantec.com/connect/forums/besr-... [Published: Fri, 19 Jun 2009 02:13:01 GMT] [854 characters, 158 words] [score: 104]

Dell servers - poweredge 2900 hot-plug hard drives

"You could make these their own mirror, or if you want to blow everything away, you have your choice of two mirrors, RAID5 with or without a hot spare, RAID6 (I would recommend) or RAID 10 (RAID 1+0). If you don't want to blow anything away, and if slots 0 and 1 have disks configured in a mirror, I believe your only choices would be RAID0, mirror, or add them as hot spares for the existing mirror. If this is the case, I would just make another mirror.Now if there are drives in slots 4 and/or 5, and these are all a RAID5, you could extend the array with Open Manage, I believe (someone correct me if I am wrong).Burt You can mirror the second pair as their own array. It won't touch the firs" [37]

Quoted from
www.tek-tips.com/viewthread.cfm?qid=1... [Published: Dynamic Content on Fri, 19 Jun 2009 02:13:03 GMT] [696 characters, 135 words] [score: 92]

Dell servers - Dell Poweredge Raid 10* Setup*

"Member Login Come Join Us! E-mail* Handle Select A Type MIS IS/IT--Management Programmer ISP Instructor Vendor TechnicalUser Password Verify P'word Member Feedback Dell Poweredge Raid 10 Setup Hi Everyone,I'm currently an Automotive Design Engineer who has been tasked to setup a new file server for our CAD data to run with a PDM system. The system spec is as follows:i) PE 2900 III Quad Core Xeon E5430 (2.66GHz, 2x6MB, 1333MHz FSB) x2ii) 8GB (4x2GB Dual Rank DIMMs) 667MHz FBD400GB SAS 10kiii) PERC 6/i Internal RAID Controller Card (256MB cache, battery backup)iv) PV110T LTO3 400GB Internal 39320A SCSI Card Internal Cablev)Broadcom NetXtreme 5721 Single Port Gigabit Ethernet Teaming NIC, Cu, PCIe x1vi) PE2900 III C5 R10 PERC 5/i / 6/i Min. 4 Max. 8 DrivesMy problems are that I've never setup a server before so this is a very steep learning curve. I've instal" [38]

Quoted from
www.tek-tips.com/viewthread.cfm?qid=1... [Published: Dynamic Content on Fri, 19 Jun 2009 02:13:02 GMT] [869 characters, 143 words] [score: 192]

Seeking opinions on RAID 5 with XP Pro on Dell Server

"It could be OK with a good controller, but RAID 10 would generally be easier to get right. RAID 5 can have problems with write performance, esp. small writes. Dell seems to charge a lot for their drives. Sourcing these elsewhere could get you a better price and/or greater capacity. But you'd have to have someone set them up. I guess the drives might be priced with a labor charge built-in. Starting with bigger drives would be more important for RAID 10, as it doesn't expand as easily as RAID 5. Depending on the application / load (or power costs), you might get some benefit from going to a newer generation processor -- these will ge" [39]

Quoted from
www.tomshardware.com/forum/225111-32-... [Published: Tue, 20 Feb 2007 22:18:20 GMT] [640 characters, 116 words] [score: 167]

Continueing relyability problems with SCO 6....

"It runs a RAID 10 configuration. It uses the mega hba, Revision 8.03a Release Date: 03 May 2005 driver for the PERC DC4 raid controller. The machine runs as a breeze, very fast access to the filesystem but the problem is that it can run without a problem for months, e.g. 3 months but suddenly freezes then. I have to say that the problem becomes worse after the first freeze after a fresh installation. I've had a script on it that every 10 seconds put the time + the output of a w and a ps -ef to the harddisk. The script has created the last file before the system froze, but not" [40]

Quoted from
www.unix.com/sco/44874-continueing-re... [Published: Dynamic Content on Fri, 19 Jun 2009 02:20:23 GMT] [584 characters, 113 words] [score: 99]

Dell PowerEdge 2850 RAID Config Questions [A...

"Is it possible to add a 6th hard drive and create a third RAID-1 array using the embedded RAID controller for use as /home2? If not, is it possible to recreate the second RAID-1 array as /home2 and add a 6th drive that is not in a RAID config for use as /backup (since it doesn't need to be in a RAID array), while keeping the global hot spare? If the above two options are not possible, will I have to explore using RAID-5 or RAID-10 for the last 4 drives, keep the initial RAID-1 array? Thanks for your help! So it's a 1x6 backplane? I'd do a Raid 10 on the last four if you don't intend to change the primary raid 1 either. Raid 5 would give you another 60GB of space but wouldn't do anything really for performance vs raid 10. I'm curious as to why he recommended you split up the drives like that when it wasn't a split 2x4 backplane. dell 2850 should have 6x hot-swap SCA bays, so adding the 6th HDD shouldn't be a problem. why not just add a 146G/10k (big enough to cover 2x RAID1, 10k drive is good enough for backup ) and mounted as /backup , convert the 2nd RAID1 as" [41]

Quoted from
www.webhostingtalk.com/archive/index.... [Published: Dynamic Content on Fri, 19 Jun 2009 02:13:04 GMT] [1078 characters, 212 words] [score: 268]

RE: Dell-Oracle-Linux: Anyone else run this...because its not working for us!

"A week ago last Monday, a single failed hard drive in a hardware RAID 10 configuration took down a server running Oracle 10g R1 on a Dell PE 2650. Yes, that RAID volume supported the OS mount points but isn't thepoint of (hardware) RAID 10 to handle the fault and not propagate the failure to the OS? . A replacement of the failed drive and a system restart kicked in the auto-rebuild of the volume, but still I was unhappy that the unit didn't take the hit and kept ticking. I haven't had a window yet to upgrade the firmware and drivers and see if that alleviates the problem. . Months ago, a refurbished Dell PE 2800 repeatedly threw errors when running a large import job. The internal RAID" [42]

Quoted from
www.orafaq.com/maillist/oracle-l/2005... [Published: Sat, 02 Jun 2007 13:15:24 GMT] [696 characters, 129 words] [score: 172]

Glossary: Dell PowerEdge 400SC Systems User's Guide

"Some common implementations of RAID include RAID 0, RAID 1, RAID 5, RAID 10, and RAID 50. See also guarding, mirroring, and striping. ROM . Read-only memory. Your system contains some programs essential to its operation in ROM code. A ROM chip retains its contents even after you turn off your system. Examples of code in ROM include the program that initiates your system's boot routine and the POST. SMART . Self-Monitoring Analysis and Reporting Technology, which allows hard drives to report errors and failures to the system BIOS and then display an error message on the" [43]

Quoted from
www.webmadeeasy.net/ComputerDocs/Dell... [Published: Fri, 18 Apr 2003 15:42:04 GMT] [576 characters, 97 words] [score: 123]

Can't Restore Dell PowerEdge 2950 RAID 10* - Wilders Security Forums*

"Identically configured with PERC6 RAID controllers in RAID 10 configuration with six 450GB SAS drives for a total usable space of 1.22 TB. I have the latest TrueImage Server product. I created a boot CD as well as a boot USB drive. The same problem occurs with both. The OS is Windows Server 2003. The Dell Utility that is used to install the OS creates a small FAT16 utility partition. I can't backup or restore when booting from the CD-ROM or the USB drive. It says Analyzing partition C: and then spontaneously reboots. I can backup from within Windows, but the restore fails after it reboots to restore the partitions. What am I doing wrong? Does TI support RAID 10 in the confi" [44]

Quoted from
www.wilderssecurity.com/showthread.ph... [Published: Dynamic Content on Fri, 19 Jun 2009 02:13:04 GMT] [683 characters, 123 words] [score: 260]

	RAID 10
Page			Popularity
	1.	RAID 10	1294
	2.	RAID 10 in context with: +2003+answer+gigabyte+least+many+needed+preferred+resiliency+default+said+depends+accomplished+admin+then+external+total+firmware+vendor+window	235
	3.	RAID 10 in context with: +postgresql+apache+application+cellular+comparisons+consultant+dell+director+engine+epoch+heaviest+hello+2950+internet+michael+miki+million+4848113+poweredge+product+products+recommended+weaving+analyze	217
	4.	RAID 10 in context with: +george+everyone+facts+fastest+found+about+gives+highest+important+appeal+offers+particular+appreciates+poor+availability+shortened+showed+sponsor+basis+best+times+until+using+chunk+word+worlds+coming	163
	5.	RAID 10 in context with: +list+poweredge+dell+would	156
	6.	RAID 10 in context with: +blocks+calculated+confused+follows+identical+among+layout+limitations+noted+administrative+preferable+purely+replicating+setups+sharing+smallest+software+splitting+stripes+these+thus+advantages+typical+where	112
	7.	RAID 10 in context with: +drives+mirror+have+server+stripe+four+disk+array+minimum+this+create+when+2003+from+answer+gigabyte+just+least+many+method+mirroring+mirrors+must+needed+number+configurations+preferred+read+resiliency+default+said+depends	86
	8.	RAID 10 Operation not support with volume of this level	72
	9.	RAID 10 in context with: +failed+improved+increases+indeed+avoid+mirr+omit+clearer+operate+complexity+physical+confusion+second+consists+several+continues+creates+though+vendors	1
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RAID 10