Re: Poor SCSI drive performance on SMP machine, 2.2.16

paradox3 (
Mon, 29 Jan 2001 00:02:35 -0500

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Here is the output from dmesg. How do I tell if it is improperly terminated?

Thanks, Para-dox (

----- Original Message -----
From: "Michael Brown" <>
To: <>
Sent: Sunday, January 28, 2001 11:12 PM
Subject: Re: Poor SCSI drive performance on SMP machine, 2.2.16

> Your problem appears to be improper SCSI termination.
> You need to either
> 1) make sure your SCSI drive has termination enabled
> or
> 2) move your SCSI drive to the middle connector and put a terminator on
> the last connector
> Check your syslog and post to l-k the part where it detects your drives.
> I'll bet the adapter is throttling back quite dramatically in the presence
> of improper termination.
> --
> Michael Brown
> _________________________________________________________________
> Get your FREE download of MSN Explorer at

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(scsi0) <Adaptec AIC-7890/1 Ultra2 SCSI host adapter> found at PCI 0/12/0=0A=
(scsi0) Wide Channel, SCSI ID=3D7, 32/255 SCBs=0A=
(scsi0) Downloading sequencer code... 392 instructions downloaded=0A=
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.31/3.2.4=0A=
<Adaptec AIC-7890/1 Ultra2 SCSI host adapter>=0A=
scsi : 1 host.=0A=
(scsi0:0:0:0) Synchronous at 40.0 Mbyte/sec, offset 15.=0A=
Vendor: IBM Model: DGHS09U Rev: 0350=0A=
Type: Direct-Access ANSI SCSI revision: 03=0A=
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0=0A=
scsi : detected 1 SCSI disk total.=0A=
SCSI device sda: hdwr sector=3D 512 bytes. Sectors=3D 17916240 [8748 MB] =
[8.7 GB]=0A=
Partition check:=0A=
sda: sda1 sda2 sda3=0A=


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