RAID 3 / RAID 5

Posted in 1993

Richard Dribbly — Wed, 7 Apr 93 12:51:58 +0800 — source: Informix-list mailing list archive (1991-1998)

%UNIPLEX %TO informix-list@rmy.emory.edu %FROM rridley %SYSTEM DHLNET %SUBJECT RAID 3 / RAID 5 %VERIFY y %DATE 07/04/93 12:51 %REFERENCE 17771 RE: | Yes - if you are planning to use disk striping , unless you are using | them mainly for graphic data and/or BLOBS, my advice is : don't! :) | We have been told that they are not designed for normal database | access but are good for sequential data access. We have found that, | using normal Informix databases, the performance is miserable | compared to using independent disks. The only thing that we could do | to try and improve performance was to minimize disk head movement. >Um, was this with RAID 3 or RAID 5? It sounds like RAID 3's >performance characteristics. Yup - this was with RAID 3 - hadn't actually heard of RAID 5 before and am checking on that one. Could you (or any-one else) perhaps help with some info on the differences between the two ? Cheers, Richard Ridley %UEND