Re: Informix on Raid 5

David Williams wrote } }In article <01bc0fdb$eeed12e0$1d6a93c0@dashforcash.chrims.com>, * }<smitty@chrims.com> writes }>Hello }> I have a question regarding increased performance from the informix engine }>when used on a RAID 5 system in a sco unix environment .... } } I believe RAID 5 is the version which has very poor write performance. } This is because all of the parity info is stored on one disk. This } means that EVERY write involves one write to the parity disk. Wrong - RAID4 holds parity data on one drive, RAID5 stripped over all drives. RAID4 is the poor one with write performance ... } You would get better peformance with RAID 1 (i.e. mirroring) where } not all writes involve writing to the same disk drive which becomes } a bottleneck. More spindles, faster engine :-) -- Chris Drauch <cdr@xteam.co.at> ... just speaking for myself ...