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Cc: anders.odberg@usit.uio.no
Subject: scsi errors and crash
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From: Anders Odberg <anders.odberg@usit.uio.no>
Date: 03 Jul 1998 15:52:55 +0200
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Hi,

I have a Dell Poweredge 2200 with a scsi-scsi CMD raid-box (consisting of 3
Seagate Cheetah 4.5GB disks striped together) attatched to a 2940
controller, the relevant output from dmesg are :

  ahc1 <Adaptec 2940 Ultra SCSI host adapter> rev 0 int a irq 15 on pci0:18:0
  ahc1: aic7880 Wide Channel, SCSI Id=7, 16 SCBs
  ahc1 waiting for scsi devices to settle
  (ahc1:2:0): "CMD TECH CRD-5330 C1-2" type 0 fixed SCSI 2
  sd1(ahc1:2:0): Direct-Access 13017MB (26658816 512 byte sectors)

I'm running FreeBSD-2.2.6. The system has crashed twice with these messages :

  Jun 27 00:29:41 feedme /kernel: sd1(ahc1:2:0): SCB 0x1 - timed out in
  dataout phase, SCSISIGI == 0x4
  Jun 27 00:29:41 feedme /kernel: SEQADDR = 0x41 SCSISEQ = 0x12 SSTAT0 = 0x7
  SSTAT1 = 0x2
  Jun 27 00:29:41 feedme /kernel: sd1(ahc1:2:0): abort message in message
  buffer
  Jun 27 00:29:42 feedme /kernel: Unexpected busfree.  LASTPHASE == 0x0
  Jun 27 00:29:42 feedme /kernel: SEQADDR == 0x41
  Jun 27 00:29:42 feedme /kernel: sd1(ahc1:2:0): no longer in timeout
  Jun 27 00:29:51 feedme /kernel: Timedout SCB handled by another timeout
  ...
  Jul  1 21:12:04 feedme /kernel: sd1(ahc1:2:0): SCB 0x1 - timed out in
  dataout phase, SCSISIGI == 0x4
  Jul  1 21:12:04 feedme /kernel: SEQADDR = 0x121 SCSISEQ = 0x12 SSTAT0 = 0x0
  SSTAT1 = 0x2
  Jul  1 21:12:04 feedme /kernel: sd1(ahc1:2:0): abort message in message
  buffer
  Jul  1 21:12:06 feedme /kernel: Unexpected busfree.  LASTPHASE == 0x0
  Jul  1 21:12:06 feedme /kernel: SEQADDR == 0x122
  Jul  1 21:12:06 feedme /kernel: sd1(ahc1:2:0): no longer in timeout
  Jul  1 21:12:14 feedme /kernel: Timedout SCB handled by another timeout

The machine won't respond to anything other than ping until I reset it,
then it boots fine (apart from some output from fsck, of course). I've
searched the mailinglist archives, but still have no clear idea as to what
could have caused these crashes. The AWRE and ARRE settings were 0 before the
first crash, but were set to 1 before the second crash.

Any hints as to how to fix this would be most welcome.

Regards,
	-Anders.

-- 
  Anders Odberg, <odberg@usit.uio.no>
  Center for Information Technology Services
  University of Oslo, Norway

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