Comments on: RAID5 on two disks only http://tips.at.gg3.net/2006/12/20/raid5-on-two-disks-only/ Dumping ground for small tips and big papers Fri, 12 Mar 2010 17:12:44 +0000 http://wordpress.org/?v=2.5.1 By: chutz http://tips.at.gg3.net/2006/12/20/raid5-on-two-disks-only/#comment-320 chutz Thu, 02 Oct 2008 14:53:58 +0000 http://tips.at.gg3.net/2006/12/20/raid5-on-two-disks-only/#comment-320 @Anonymous: I agree with what you're saying and I would expect RAID5 to be slower when <strong>writing</strong>, though I would also expect to hardly be noticeable at all. The case with <strong>reading</strong> is quite different and <a href="http://tips.at.gg3.net/2007/02/12/raid-5-is-faster-than-raid-1-reading/" rel="nofollow">RAID5 is much faster</a>. @Anonymous: I agree with what you’re saying and I would expect RAID5 to be slower when writing, though I would also expect to hardly be noticeable at all.

The case with reading is quite different and RAID5 is much faster.

]]> By: Anonymous http://tips.at.gg3.net/2006/12/20/raid5-on-two-disks-only/#comment-319 Anonymous Thu, 02 Oct 2008 13:33:31 +0000 http://tips.at.gg3.net/2006/12/20/raid5-on-two-disks-only/#comment-319 RAID5 on two disks is NOT the same as RAID1 on two disks. Functionally, yes, but there are performance differences, somewhat dependant on implementation. RAID5 can never be faster than and is generally slower than RAID1, on two disks. Due to computational overhead, if nothing else. RAID5 on two disks is NOT the same as RAID1 on two disks. Functionally, yes, but there are performance differences, somewhat dependant on implementation. RAID5 can never be faster than and is generally slower than RAID1, on two disks. Due to computational overhead, if nothing else.

]]> By: chutz http://tips.at.gg3.net/2006/12/20/raid5-on-two-disks-only/#comment-234 chutz Sun, 13 Jul 2008 04:18:48 +0000 http://tips.at.gg3.net/2006/12/20/raid5-on-two-disks-only/#comment-234 As the linked article below shows, RAID5 on two disks is exactly the same as RAID1. http://www.n8gray.org/blog/2006/09/05/stupid-raid-tricks-with-evms-and-mdadm/ As the linked article below shows, RAID5 on two disks is exactly the same as RAID1.

http://www.n8gray.org/blog/2006/09/05/stupid-raid-tricks-with-evms-and-mdadm/

]]> By: chutz http://tips.at.gg3.net/2006/12/20/raid5-on-two-disks-only/#comment-51 chutz Sat, 16 Jun 2007 05:23:52 +0000 http://tips.at.gg3.net/2006/12/20/raid5-on-two-disks-only/#comment-51 The <a href="http://en.wikipedia.org/wiki/Standard_RAID_levels" rel="nofollow">wikipedia article</a> was corrected soon after I posted this article. The article that I was referring to looked like <a href="http://en.wikipedia.org/w/index.php?title=Standard_RAID_levels&oldid=99659647#RAID_5" rel="nofollow">this</a>. The wikipedia article was corrected soon after I posted this article. The article that I was referring to looked like this.

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