2.2.16 on alpha, SCSI problems

[Stephen Williams]

I have an Intraserver SCSI card with a couple SCSI disks, and a phasewriter
rewriteable optical drive I use for backups. Under 2.2.14 this arrangement
works fine, but with the 2.2.16 the dumps to the PD drive lock up. Below are
some pertinent lines from the system logs.

These are the driver discovering the devices:

Jun 28 10:46:02 icarus kernel: sym53c875-0-<0,*>: WIDE SCSI (16 bit) enabled.
Jun 28 10:46:03 icarus kernel: sym53c875-0-<0,*>: FAST-10 WIDE SCSI 20.0 MB/s (100 ns, offset 15)
Jun 28 10:46:03 icarus kernel: SCSI device sda: hdwr sector= 512 bytes. Sectors= 4406960 [2151 MB] [2.2 GB]
Jun 28 10:46:03 icarus kernel: sym53c875-0-<1,*>: WIDE SCSI (16 bit) enabled.
Jun 28 10:46:03 icarus kernel: sym53c875-0-<1,*>: FAST-20 WIDE SCSI 40.0 MB/s (50 ns, offset 16)
Jun 28 10:46:03 icarus kernel: SCSI device sdb: hdwr sector= 512 bytes. Sectors= 17774160 [8678 MB] [8.7 GB]
Jun 28 10:46:03 icarus kernel: sym53c875-0-<2,*>: FAST-5 SCSI 5.0 MB/s (200 ns, offset 16)
Jun 28 10:46:03 icarus kernel: SCSI device sdc: hdwr sector= 512 bytes. Sectors= 1298496 [634 MB] [0.6 GB]
Jun 28 10:46:03 icarus kernel: sdc: Write Protect is off

I find these in the log at the time when the dump process hangs:

Jun 29 03:10:00 icarus kernel: sym53c875-0-<0,0>: QUEUE FULL! 8 busy, 7 disconnected CCBs
Jun 29 03:10:00 icarus kernel: sym53c875-0-<0,0>: tagged command queue depth set to 7
Jun 29 03:10:00 icarus kernel: sym53c875-0-<0,0>: QUEUE FULL! 7 busy, 6 disconnected CCBs
Jun 29 03:10:00 icarus kernel: sym53c875-0-<0,0>: tagged command queue depth set to 6
Jun 29 03:10:00 icarus kernel: sym53c875-0-<0,0>: QUEUE FULL! 6 busy, 5 disconnected CCBs
Jun 29 03:10:00 icarus kernel: sym53c875-0-<0,0>: tagged command queue depth set to 5
Jun 29 03:10:00 icarus kernel: sym53c875-0-<0,0>: QUEUE FULL! 5 busy, 4 disconnected CCBs
Jun 29 03:10:00 icarus kernel: sym53c875-0-<0,0>: tagged command queue depth set to 4
Jun 29 03:10:00 icarus kernel: sym53c875-0-<0,0>: QUEUE FULL! 4 busy, 3 disconnected CCBs
Jun 29 03:10:00 icarus kernel: sym53c875-0-<0,0>: tagged command queue depth set to 3
Jun 29 03:10:08 icarus kernel: sym53c875-0-<0,0>: QUEUE FULL! 3 busy, 2 disconnected CCBs
Jun 29 03:10:18 icarus kernel: sym53c875-0-<0,0>: tagged command queue depth set to 2
Jun 29 03:10:20 icarus kernel: sym53c875-0-<0,0>: QUEUE FULL! 2 busy, 1 disconnected CCBs
Jun 29 03:10:27 icarus kernel: sym53c875-0-<0,0>: QUEUE FULL! 2 busy, 1 disconnected CCBs
Jun 29 03:10:27 icarus kernel: sym53c875-0-<0,0>: tagged command queueing disabled

-- 
Steve Williams                "The woods are lovely, dark and deep.
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