Lockups

[There can be only one.]

Hello there,

I'm experiencing random lockups; I previously thought it was my ethernet
card since major network transfers were origionally what sparked the
problems but now I'm thinking it's my disks (I've replaced the ethernet
card, and it did this during a major file copy without network stuff).
They're on a SCSI Adaptec AIC-7895 Ultra SCSI host adapter -- the sort
that
comes on the Intel dual-PentiumII motherboards.  I'm using kernal
2.0.34.
I have two disks, their information under /proc/scsi/scsi is as follows:


Host: scsi0 Channel: 00 Id: 05 Lun: 00
  Vendor: IBM      Model: DCAS-34330W      Rev: S65A
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 06 Lun: 00
  Vendor: IBM      Model: DCAS-34330W      Rev: S65A
  Type:   Direct-Access                    ANSI SCSI revision: 02

When the machine crashes, it locks -DEAD- and when rebooting sometimes
it does some severe fsck barfs (last time it did it, luckily, I had
sync'd
the disks not too long ago and didn't have any serious problems).


I get massive SCSI boot messages when I turn my computer on, here they
are
if this helps any:

Aug 29 12:48:01 paradox kernel: aic7xxx: Warning - detected
auto-termination on controller:
Aug 29 12:48:01 paradox kernel: aic7xxx: <Adaptec AIC-7895 Ultra SCSI
host adapter> at PCI9/0
Aug 29 12:48:01 paradox kernel: aic7xxx: Please verify driver detected
settings are correct.
Aug 29 12:48:01 paradox kernel: aic7xxx: If not, then please properly
set the device termination
Aug 29 12:48:01 paradox kernel: aic7xxx: in the Adaptec SCSI BIOS by
hitting CTRL-A when prompted
Aug 29 12:48:01 paradox kernel: aic7xxx: during machine bootup.
Aug 29 12:48:01 paradox kernel: aic7xxx: Cables present (Int-50 YES,
Int-68 YES Ext-68 YES)
Aug 29 12:48:01 paradox kernel: aic7xxx: Illegal cable configuration!! 
Only two
Aug 29 12:48:01 paradox kernel: aic7xxx: connectors on the SCSI
controller may be in use at a time!
Aug 29 12:48:01 paradox kernel: aic7xxx: Termination (Low OFF, High OFF)

(message is repeated again, just like that one, then)

Aug 29 12:48:01 paradox kernel: (scsi0) Wide Channel A, SCSI ID=7,
32/255 SCBs
Aug 29 12:48:01 paradox kernel: (scsi0) BIOS enabled, IO Port 0xf800,
IRQ 9
Aug 29 12:48:01 paradox kernel: (scsi0) IO Memory at 0xfecff000, MMAP
Memory at 0x10007000
Aug 29 12:48:01 paradox kernel: (scsi0) Resetting channel A
Aug 29 12:48:01 paradox kernel: (scsi0) Downloading sequencer code...
413 instructions downloaded
(message is repeated again)

Aug 29 12:48:01 paradox kernel: (scsi0:0:-1:-1) Scanning channel for
devices.
Aug 29 12:48:01 paradox kernel: (scsi0:0:5:0) Using wide (16 bit)
transfers.
Aug 29 12:48:01 paradox kernel: (scsi0:0:5:0) Synchronous at 20.0MHz,
offset 8.
Aug 29 12:48:01 paradox kernel: (scsi0:0:6:0) Using wide (16 bit)
transfers.
Aug 29 12:48:01 paradox kernel: (scsi0:0:6:0) Synchronous at 20.0MHz,
offset 8.
Aug 29 12:48:01 paradox kernel: (scsi1:0:-1:-1) Scanning channel for
devices.


The syslogs show no messages when the machine crashes.  PLease help me,
I'm
totally SCSI illiterate and I don't know anyone over here in Raleigh, NC
who
can help me :-(






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| Steve Conley     | System Administrator, Serpentine Network Industries
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