On Sunday, 13 July 2003 at 4:45:08 -0500, Andrea Venturoli wrote: > ** Reply to note from "Greg 'groggy' Lehey" <[EMAIL PROTECTED]> Sat, 12 Jul 2003 > 17:13:29 +0930 > > >> The real performance penalty for RAID-5 is simply that writes require >> so much I/O. Expect 25% of the write performance of RAID-0. > > Ok, I must ask this: > Shouldn't SCSI system allow paralell writes on different disks?
Yes, it does. > If so, why so much penalty? Take a look at the man page, section "Performance considerations". It's too long to repeat here. Greg -- When replying to this message, please copy the original recipients. If you don't, I may ignore the reply or reply to the original recipients. For more information, see http://www.lemis.com/questions.html See complete headers for address and phone numbers
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