So I'm R&D'ing a new SCSI raid server, and we're using ultra320 drives (15k RPM) and looking at two possible raid cards. One is the Adaptec 2200s ultra320 64bit raid card, the other is LSI's megaraid 320-2, which is also a 2 channel ultra 320 64bit raid card. The problem is the performance of both of these cards STINKS with the 2.4.20* kernels. At first, I thought it was a RHL9 issue. hdparm -t on a 3drive raid5 array only gives ~40M/s rates in RHL9. I installed RHL8 on the system, and the same test (hdparm -t) on the same drives with the 2.4.18-27 kernel gives me ~150M/s. This is fine, we could go with 8, but now the 2.4.20-13 kernel has been released to RHL8 as well. Using this kernel again, we get only ~40M/s with hdparm in both RHL9 and RHL8. I have to revert back to the 2.4.18-27 kernel. Could anybody speak to why the performance of both these cards suck in 2.4.20? it's not like there are any alternatives for ultra 320 raid in Linux. -- Jesse Keating RHCE MCSE http://geek.j2solutions.net Mondo DevTeam (http://www.microwerks.net/~hugo/) Was I helpful? Let others know: http://svcs.affero.net/rm.php?r=jkeating
