RAID 10

Glued on February 25, 2009 at 22:34 EST

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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" [1] Quoted from archives.postgresql.org/pgsql-perform... [Published: Wed, 17 Jan 2007 11:57:55 -0400 (AST)] [589 characters, 125 words] [score: 301]	RAID 1+0 is the Cadillac of RAID | Storage Bits | ZDNet.com "What is RAID 1+0? Sometimes shortened to RAID 10, RAID 1+0 is a particular combination of two different RAID levels: mirroring (RAID 1) and striping (RAID 0). The appeal of RAID 1+0 is simple: mirroring gives you the highest level of availability RAID offers, with the fastest rebuild times when a disk fails; while striping - using the proper chunk size - is the basis for high-performance I/O. . Put the two together and you have the best of both worlds. Until George showed up with his facts. . What about the poor performance George found? We re coming to that, but first a word from our sponsor. . There is an important difference between RAID 1+0 and RAID 0+1 that not everyone appreciates. In RAI" [2] Quoted from http://blogs.zdnet.com/storage/?p=131 [Published: Dynamic Content on Thu, 26 Feb 2009 03:36:11 GMT] [704 characters, 126 words] [score: 177]	File:RAID 10.png - Wikimedia Commons "File:RAID 10.png File links . . . Afrikaans Alemannisch Aragonés العربية Asturianu Български Беларуская (тарашкевіца) Català Cebuano Česky Cymraeg Dansk Deutsch Ελληνικά English Español Esperanto Eesti Euskara Estremeñu فارسی Français Galego ქართული 한국어 हिन्दी Hrvatski Ido Bahasa Indonesia Íslenska Italiano עברית Kurdî / كوردی Latina Lietuvių Latviešu Magyar Македонски Bahasa Melayu Plattdüütsch Ne" [3] Quoted from commons.wikimedia.org/wiki/File:RAID_... [Published: Fri, 20 Feb 2009 12:15:39 GMT] [516 characters, 53 words] [score: 170]

What is RAID? "RAID 10 or 1+0 . RAID 10 is effectively a similar version to RAID 0+1. Rather than striping data between the disk sets and then mirroring them, the first two drives in the set are a mirrored together. The second two drives form another set of disks that is are mirror of one another but store striped data with the first pair. This is a form of nested RAID setup. Drives 1 and 2 are a RAID 1 mirror and drives 3 and 4 are also a mirror. These two sets are then setup as stripped array. . Below is an example of how data is written in a RAID 10 implementation. Each r" [4] Quoted from compreviews.about.com/od/storage/l/aa... [Published: Dynamic Content on Thu, 26 Feb 2009 03:36:12 GMT] [567 characters, 114 words] [score: 253]	Nested RAID levels - Wikipedia, the free encyclopedia "It is not as robust as RAID 10 and cannot tolerate two simultaneous disk failures, unless the second failed disk is from the same stripe as the first. That is, once a single disk fails, each of the mechanisms in the other stripe is single point of failure. Also, once the single failed mechanism is replaced, in order to rebuild its data all the disks in the array must participate in the rebuild. . The exception to this is if all the disks are hooked up to the same RAID controller in which case the controller can do the same error recovery as RAID 10 as it can still access the functional disks in each RAID 0 set. If you compare the diagrams between RAID 0+1 and RAID 10 and ignore the lines abo" [5] Quoted from en.wikipedia.org/wiki/Nested_RAID_lev... [Published: Tue, 17 Feb 2009 12:44:51 GMT] [701 characters, 134 words] [score: 244]	RAID - Wikipedia, the free encyclopedia "For example, RAID 10 (or RAID 1+0) consists of several level 1 arrays of physical drives, each of which is one of the "drives" of a level 0 array striped over the level 1 arrays. It is not called RAID 01, to avoid confusion with RAID 1, or indeed, RAID 01. When the top array is a RAID 0 (such as in RAID 10 and RAID 50) most vendors omit the "+", though RAID 5+0 is clearer. RAID 0+1: striped sets in a mirrored set (minimum four disks; even number of disks) provides fault tolerance and improved performance but increases complexity. The key difference from RAID 1+0 is that RAID 0+1 creates a second striped set to mirror a primary striped set. The array continues to operate with one or more drives failed in the same mirr" [6] Quoted from http://en.wikipedia.org/wiki/RAID [Published: Wed, 25 Feb 2009 10:02:45 GMT] [727 characters, 137 words] [score: 259]

Blades - General Discussion - Controller LSI 1068E and raid 10 "I 'd like to create a raid 10 with raidctl on a Blade 6320. I have 4 disks of 146Gb. After I jumpstarted the blade I did as follow: . # raidctl -C "(0.0.0 0.1.0)(0.2.0 0.3.0)" -r 10 0 Creating RAID volume will destroy all data on spare space of member disks, proceed (yes/no)? y Operation not support with volume of this level. . Does anybody know if it's possible? Any clue/suggestions? TIA san2rini Sorry the LSI 1068E controller does not support RAID 10. Supported volume options on this controller are Raid 0, 1 or 1E. 1E is the closest thing to what you want. Search docs.sun.com" [7] Quoted from forums.sun.com/thread.jspa?threadID=5... [Published: Dynamic Content on Thu, 26 Feb 2009 03:36:19 GMT] [586 characters, 107 words] [score: 291]	IT Resource Center forums - How to setup Raid 10 array "I use Microsoft SCCM which uses SQL as its database and I've been told Raid 10 is the way to go. From what I've googled it appears that Raid 10 is just a stripe of Raid 1 (mirror) arrays. Therefore how would I set it up on a DL380 lets say for example. Assume there are 8 bays, Is it just as simple as saying 4 pairs as a C,D,E and F volume ?. What is the redundancy on this i.e can two disks go down (not in same mirror) and the system still work ok Also can you mix and match disk sizes e.g. 36gb for O/S and bigger for data drives ? Thanks ! Yes, RAID 10 is a stripe of mirros.You can create" [8] Quoted from forums13.itrc.hp.com/service/forums/q... [Published: Dynamic Content on Thu, 26 Feb 2009 03:36:21 GMT] [595 characters, 126 words] [score: 331]	Install RAID 10 on Ubuntu "Raid 10 is the fastest RAID level that also has good redundancy too. So I was disappointed that Ubuntu did not have it as a option for my new file server. I did not want shell out lots of money for a RAID controller, especially since benchmarks show little performance benefit using a Hardware controller configured for RAID 10 in a file server. read more score:9608 -falko, August 20, 2008 More Sysadmin articles.... Using Xen with LVM instead of Image VMs OpenVAS: Open source vulnerability assessment scanner Postfix Virtual Hosting with LDAP on Ubuntu How" [9] Quoted from http://librenix.com/?inode=12460 [Published: Dynamic Content on Thu, 26 Feb 2009 03:36:21 GMT] [561 characters, 95 words] [score: 266]

[CentOS] RAID 5 vs. RAID 10 "RAID 10 Bryan J. Smith b.j.smith at ieee.org . Mon Jul 25 11:49:10 UTC 2005 . . On Mon, 2005-07-25 at 17:57 +0800, Andrew Vong wrote: Hi, I am looking into purchasing a new server. This server will be mission-critical. What application(s)? That's the biggie. I have read and somewhat understood the theories behind RAIDs 0, 1, 5, 10 JBOD. However, I would like to get some feedback from those who have experience in implementing and recovering from a HDD failure using RAID. On a 3Ware card (no spare): - Pull out bad drive - Put in new dr" [10] Quoted from lists.centos.org/pipermail/centos/200... [Published: Wed, 13 Aug 2008 11:33:00 GMT] [540 characters, 99 words] [score: 208]	Re: Software vs Hardware RAID 10? "[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index] Re: Software vs Hardware RAID 10? . On Sat, Aug 25, 2007 at 08:37:33AM -0500, Neil Gunton wrote: I'm curious as to whether anyone has experience of software RAID in Linux giving better overall performance on RAID10 than a RAID card such as the Adaptec 2015S. Server: Dual Opteron 265, 1.8GHz, i.e. 4 cores total, 4GB RAM, 4x10k Fujitsu SCSI 73GB, Adaptec 2015S zero-channel RAID card. Currently I have the four drives in RAID10 using the Adaptec, i.e. it appears as one big drive to Linux. Then a few days ago I saw this video presentation on scaling from one of the" [11] Quoted from lists.debian.org/debian-amd64/2007/08... [Published: Sat, 08 Mar 2008 03:47:51 GMT] [645 characters, 112 words] [score: 208]	Linux-Kernel Archive: Re: 3ware 6410 RAID 10 performance? "Re: 3ware 6410 RAID 10 performance? From: Larry McVoy ( lm@bitmover.com ). Date: Fri May 04 2001 - 15:12:39 EST . Next message: Frank de Lange: "pegasus + MediaGX: Oops in khubd, the continuing story?" Previous message: Nico Schottelius: "Re: added a new feature: disable pc speaker" In reply to: Larry McVoy: "3ware 6410 RAID 10 performance?" Next in thread: Larry McVoy: "Re: 3ware 6410 RAID 10 performance?" Reply: Larry McVoy: "Re: 3ware 6410 RAID 10 performance?" Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] . . More data: . . the test file is 2GB in size. . When I d" [12] Quoted from lkml.indiana.edu/hypermail/linux/kern... [Published: Wed, 13 Aug 2003 22:01:36 GMT] [592 characters, 109 words] [score: 383]

Storage Advisors » Blog Archive » Databases, cages and RAID-10, oh my! "Databases, cages and RAID-10, oh my! Posted in Storage Interconnects RAID, Advisor - Tom by Tom Treadway . Question to the Storage Advisors, from Chris: Need some quick insight if you have a moment. This is for an Oracle db server btw. We re buying 2 cages that use a PCIe interface and 24 146G 15K drives. We re going to use RAID 10. Each cage only holds 12 drives. We ll be using 2 spares in each cage (since we have to have 1 spare and can t use RAID 10 on 11 drives). So that s a stripe of 5 disk groups. At 175 IOPs that s approx 875 IOPs across the stripe (if I m using the correct terminology). If we go higher than 875 IOPs we begin seeing higher q" [13] Quoted from storageadvisors.adaptec.com/2007/03/2... [Published: Dynamic Content on Thu, 26 Feb 2009 02:35:46 GMT] [657 characters, 134 words] [score: 175]	RAID Levels 0+1 (01) and 1+0 (10) "RAID 01 is a mirrored configuration of two striped sets; RAID 10 is a stripe across a number of mirrored sets. RAID 10 and 01 have been increasing dramatically in popularity as hard disks become cheaper and the four-drive minimum is legitimately seen as much less of an obstacle. RAID 10 provides better fault tolerance and rebuild performance than RAID 01. Both array types provide very good to excellent overall performance by combining the speed of RAID 0 with the redundancy of RAID 1 without requiring parity calculations. . . This illustration shows how files of different sizes are distributed between the drives on an eight-disk RAID 0+" [14] Quoted from www.pcguide.com/ref/hdd/perf/raid/lev... [Published: Dynamic Content on Thu, 26 Feb 2009 03:36:27 GMT] [645 characters, 108 words] [score: 266]	RAID Data Recovery - RAID - 0 - RAID 1 - RAID 5 - RAID 10 - RAID 0+1 - AS/400 - Buffalo - DELL - HP - Linux - Macintosh - NAS - SAN - Novell - Snap "RAID Data Recovery AS/400 data recovery Buffalo data recovery DELL data recovery HP data recovery Linux data recovery NAS data recovery Novell data recovery RAID 0 data recovery RAID 5 data recovery RAID 10 and 0+1 data recovery SAN data recovery SNAP Server data recovery . RAID Recovery Labs was founded by a team of mathematicians, computer scientists and engineers specializing in RAID data recovery. Our team has developed some of the most sophisticated software and processes dedicated to the recovery of mass storage data. We have extensive experience in RAID controller technologies, operating systems, file systems and their related data structures like no other recovery company. . We offer professional and cost effective RAID data recovery engineering. If your serious about recovering your RAID mass storage sy" [15] Quoted from http://www.raidrecoverylabs.com/ [Published: Dynamic Content on Thu, 26 Feb 2009 03:36:31 GMT] [824 characters, 128 words] [score: 254]

Valcato Hosting - RAID 5 vs RAID 10 "You are here: Home Managed Servers RAID 5 vs RAID 10 RAID 5 vs RAID 10 . RAID is a technology which allows your data to be stored across multiple hard drives, allowing the operating system to use the drives as though they were one larger disk. In addition to allowing larger storage capacity, this allows data redundancy and improved performance. There are different RAID levels, which provide differing levels of redundancy, performance and storage capacity. . We offer a choice of either RAID 5 or RAID 10 RAID 10 offers better performance and better redundancy, but with a lower total capacity than RAID 5 with the sa" [16] Quoted from http://www.valcatohosting.com/servers/raid [Published: Dynamic Content on Thu, 26 Feb 2009 03:36:29 GMT] [621 characters, 108 words] [score: 443]