Date: Sat, 25 Oct 1997 09:58:59 -0700 (PDT) From: lmc@chpc.utah.edu To: freebsd-gnats-submit@FreeBSD.ORG Subject: kern/4851: adaptec 2940U hangs system if scsi tape device attached Message-ID: <199710251658.JAA11009@hub.freebsd.org> Resent-Message-ID: <199710251700.KAA11106@hub.freebsd.org>
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>Number: 4851
>Category: kern
>Synopsis: adaptec 2940U hangs system if scsi tape device attached
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Oct 25 10:00:00 PDT 1997
>Last-Modified:
>Originator: Lloyd M Caldwell
>Organization:
UofU Center for High Performance Computing
>Release: FreeBSD 2.2.2-RELEASE
>Environment:
FreeBSD net.chpc.utah.edu 2.2.2-RELEASE FreeBSD 2.2.2-RELEASE #0: Sat Aug 9 16:16:41 MDT 1997 root@net.chpc.utah.edu:/usr/src/sys/compile/NETPP i386
>Description:
If scsi tape device:
"EXABYTE EXB8500C8CQANXR4 0730" type 1 removable SCSI 2
attached to adaptec 2940U:
ahc0 <Adaptec 2940 Ultra SCSI host adapter> rev 0 int a irq 9 on pci0:16
ahc0: aic7880 Single Channel, SCSI Id=7, 16 SCBs
the console shows the following:
sd0(ahc0:0:0): SCB 0x1 - timed out in dataout phase, SCSISIGI == 0x4
SEQADDR = 0x12c SCSISEQ = 0x12 SSTAT0 = 0x0 SSTAT1 = 0x2
sd0(ahc0:0:0): abort message in message buffer
sd0(ahc0:0:0): SCB 0x1 - timed out in dataout phase, SCSISIGI == 0x14
SEQADDR = 0x12c SCSISEQ = 0x12 SSTAT0 = 0x0 SSTAT1 = 0x2
ahc0: Issued Channel A Bus Reset. 1 SCBs aborted
Clearing bus reset
Clearing 'in-reset' flag
sd0(ahc0:0:0): no longer in timeout
sd0(ahc0:0:0): UNIT ATTENTION asc:29,2 field replaceable unit: 2
, retries:3
sd0(ahc0:0:0): SCB 0x1 - timed out in dataout phase, SCSISIGI == 0x4
SEQADDR = 0x12c SCSISEQ = 0x12 SSTAT0 = 0x0 SSTAT1 = 0x2
sd0(ahc0:0:0): abort message in message buffer
sd0(ahc0:0:0): SCB 0x1 - timed out in dataout phase, SCSISIGI == 0x14
SEQADDR = 0x12b SCSISEQ = 0x12 SSTAT0 = 0x0 SSTAT1 = 0x2
ahc0: Issued Channel A Bus Reset. 1 SCBs aborted
Clearing bus reset
Clearing 'in-reset' flag
sd0(ahc0:0:0): no longer in timeout
sd0(ahc0:0:0): UNIT ATTENTION asc:29,2 field replaceable unit: 2
, retries:3
>How-To-Repeat:
scsi tape device hooked up to the adaptec 2940U,
access files on any of the scsi disks or try to perform
a backup.
Note: I moved the tape device to other machines, both freebsd
with different scsi controllers and different unix's.
The tape drive performed flawlessly.
Because of the easy repeatability I would assume it's easy
too fix. If I had any expertise with SCSI programming I would
be glad to pursue this :(
>Fix:
>Audit-Trail:
>Unformatted:
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