Re: With 4 disks should I go for RAID 5 or RAID 10 - Mailing list pgsql-performance

From Mark Mielke
Subject Re: With 4 disks should I go for RAID 5 or RAID 10
Date
Msg-id 4772CA58.5050406@mark.mielke.cc
Whole thread Raw
In response to Re: With 4 disks should I go for RAID 5 or RAID 10  (Florian Weimer <fw@deneb.enyo.de>)
Responses Re: With 4 disks should I go for RAID 5 or RAID 10  (david@lang.hm)
List pgsql-performance
Florian Weimer wrote:
seek/read/calculate/seek/write since the drive moves on after the
read), when you read you must read _all_ drives in the set to check
the data integrity.   
I don't know of any RAID implementation that performs consistency
checking on each read operation. 8-( 

Dave had too much egg nog... :-)

Yep - checking consistency on read would eliminate the performance benefits of RAID under any redundant configuration.

Cheers,
mark

-- 
Mark Mielke <mark@mielke.cc>

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