On 8/16/07, Michael Ben-Nes <miki@xxxxxxxxxxx> wrote: > Hi > > I wanted to know if the integrated perc 5/i which come with Dell 2950 will > yield maximum performance from RAID 10 ( 15K SAS ). > Or should I ask for different card ? > > I read an old post that shows that RAID 10 does not work eficently under > perc 5/i > http://groups.google.com/group/pgsql.performance/browse_thread/thread/b85926fe6de1f6c2/38837995887b6033?lnk=st&q=perc+5%2Fi+performance&rnum=6&hl=en#38837995887b6033 > > Does any one have any experience with RAID 10 & perc 5/i ? no, I've tested raid 10 on a few different perc 5/i and never had those results. raid 10 often gives poor sequential read performance relative to a raid 5 but better random performance generally, which is usually more important. That said, the perc 5/e (never done raid 5 on the 5/i) has posted some of the best raid 5 numbers I've ever seen in terms of random performance on sata. merlin ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
