if you're looking for RAID performance tuning you might want to post a little more information than your buffer tuning commands. details like the RAID level you're running in and what the stripes look like and the drive layout would go a long ways toward letting folks provide some feedback to you. i've used the (A|D)1k's a few times and i've been quite impressed with their throughput. upwards of 40MB/s throughput, iirc. i think you've got something horribly misconfigured there. when last we saw our hero (Wednesday, May 08, 2002), Mike Hicks was madly tapping out: > I'm curious if anyone has experience tuning Sun A1000 (or similar) RAID > arrays on Solaris. I discovered today that the arrays we've been using > have apparently been running at about the slowest possible speed. I > used bonnie++ to test, and it recorded speeds of about 4MB/s for reading > and writing. That's an absolutely pathetic speed -- I've got a > Linux/Sparc box right next to it doing software RAID on 3 disks, and it > can push around 30MB/s. > > After hunting through some documentation, I tried enabling some caches, > which appeared to help, bringing read/write speeds up to about 10MB/s. > I figure there's plenty more I can do, though.. > > Here's what I've done so far. (The 0,1,2,3,4 bit is specifying which > LUNs to operate on, and c2t5d0s0 is the controller name) > > # enable cache read-ahead > raidutil -c c2t5d0s0 -p enable 0,1,2,3,4 > # enable write cache > raidutil -c c2t5d0s0 -w on 0,1,2,3,4 > # enable read cache > raidutil -c c2t5d0s0 -C on 0,1,2,3,4 > # set cache block size to 32 blocks > raidutil -c c2t5d0s0 -S 32 -- steve ulrich sulrich at botwerks.org PGP: 8D0B 0EE9 E700 A6CF ABA7 AE5F 4FD4 07C9 133B FAFC -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 232 bytes Desc: not available Url : http://shadowknight.real-time.com/pipermail/tclug-list/attachments/20020508/76dbe20e/attachment.pgp