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Topic Title: S2882 is slow- why ? Strange SCSI problem .... ?
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Created On: 07/19/2005 11:43 AM
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 07/19/2005 11:43 AM
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Durango2k
Junior Member

Posts: 2
Joined: 07/19/2005

Hi all,

I am new here, so please give me a pleasant start :-)

I have a server problem to solve on my desk. Trouble is as follows:

-S2882G3NR-Mainboard, 2*2Opteron 246, $GB RAM
-3Ware 9500S8 8 channel SATA, and 8* 250 GM Maxtor disks attached.
-Adaptec 29160 SCSI controller, anda Tandberg Ultrium LTO2 attached for backup.
-3com Gigabit 3csx ...nic.

Problem: All is fine, just when we do ANY SCSI-I/O, like restoring files from the tape, we get a performance drop by some 30x. I mean, the disks get by 30x slower, not just 30%, factor 30.

I will replug the 3ware into slot1, and the 29160 in slot 4, the gbit nic in slot 3
I'll also do a Bios upgrade to 3.03, we run 3.00.

Question why it drops so down when scsi i/O occurs. Any idea ? OS is W2k3 Server.

Thanks a lot for your help,

Carsten
 07/20/2005 10:25 AM
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Durango2k
Junior Member

Posts: 2
Joined: 07/19/2005

Hi,

today, I have been there, and it is as follows (little different):
-the main problem is that if one user does a big file copy job (load on the harddrives), then the whole system gets sluggish. Nothing to do with SCSI.

I will try to separate the PCI cards. At the moment, there is the 3ware on PCI1 (most right), then on 2 we have a 3com fiber, on 3 the 29160, 4 is empty. Tyan says to replug the 3ware in slot 1, and leave 2 free, net and scsi into 3&4, 3ware says the same.

tomorrow morning I'll know more on that :-)

Carsten
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