something wrong with my machine? :(

[gangaskan]

ok, so i have a server that i upgraded recently from a dual p3 750 to a E6600. when i had it on the p3 rig my transferes were 64MBS burst and read was close to the same (i am running scsi.) my scsi raid controller is a Mylex ExtremeRaid 2000 and i have 2 18's in R0 and a 74 gig stand alone. each array gets the same transferes on each machine, however, when i upgraded to the e6600 my transfer rate cut in half.


is this due to me only having the one cpu? vs the dual slot system?

[knucklehead]

Check the card bios to make sure your drives are syncing at 160.
Your 64mb of seems a bit slow, and half that is downright suspect.
I have an Adaptec 29160 with a single U320 10K Fujitsu that is faster than your raid, but should be slower. Average transfer is 74mb for my single setup. It syncs at 160.

Is it possible you have a drive going bad?

[knucklehead]

More thoughts on this:

I'm not familiar with your card, mine is 2 channel and if I get a UW drive with a sync speed of 40mb on the same channel with my u160 all drives on that channel sync to the slowest drive. This can happen even with separate cables on my card.
Maybe your termination jumper fell off? The enable term power jumper fell off?
Cable got damaged somehow in the switch? Are the drives in the same order as on the old system?

There are so many reasons for scsi to slow down or not even work. I'm not sure why I stick with it other than I've been using scsi for 15 years. that and I like the durability of scsi drives. Prices are very good lately too. With a $30 card and a $40 drive (147Gb, 80 pin Fujutsu), I have performance rivaling that of all but the fastest sata drives, and it runs cool and is very quiet for a 10k drive.
I wouldn't think your problem has anything to do with the single socket MoBoard, but with scsi you just never know what will affect performance.

[gangaskan]

its something to do with the card i know it. i'm not sure what, however, due to me not being able to boot off my scsi's on my chipset, well, i'm looking at other solutions :P