Date: Wed, 3 Nov 2004 18:22:45 +0100 From: Ben Stuyts <ben@altesco.nl> To: freebsd-stable@freebsd.org Subject: mt stuck in cbwait Message-ID: <FA1C884C-2DBC-11D9-9256-000A959CFF76@altesco.nl>
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Hi,
During the nightly backup the tape drive gave some errors and now the
mt process seems to be stuck in cbwait mode. ps -axl says:
0 44326 1 0 -6 0 916 348 cbwait D ?? 0:00.00 mt
-f /dev/nsa0 rewind
I tried several different KILL's but got nowhere. I manually ejected
the tape and put another back in again, but that didn't wake it up
either. Is there anything else I can try before rebooting the server
and killing 198 days of uptime?
uname -a:
FreeBSD earth.altus-escon.com 4.10-BETA FreeBSD 4.10-BETA #12: Mon Apr
19 06:48:13 CEST 2004
root@earth.altus-escon.com:/home2/obj/usr/src/sys/EARTH i386
Drive:
sa0 at ahc0 bus 0 target 3 lun 0
sa0: <BNCHMARK DLT1 5032> Removable Sequential Access SCSI-2 device
sa0: 20.000MB/s transfers (10.000MHz, offset 15, 16bit)
SCSI controller:
ahc0: <Adaptec 29160N Ultra160 SCSI adapter> port 0xa800-0xa8ff mem
0xdfffa000-0xdfffafff irq 11 at device 9.0 on pci0
Errors:
Nov 3 02:46:22 <kern.crit> earth /kernel: (sa0:ahc0:0:3:0): WRITE
FILEMARKS. CDB: 10 0 0 0 2 0
Nov 3 02:46:22 <kern.crit> earth /kernel: (sa0:ahc0:0:3:0): MEDIUM
ERROR info:2 csi:0,0,87,42 asc:15,2
Nov 3 02:46:22 <kern.crit> earth /kernel: (sa0:ahc0:0:3:0):
Positioning error detected by read of medium
Nov 3 02:46:22 <kern.crit> earth /kernel: (sa0:ahc0:0:3:0): failed to
write terminating filemark(s)
...
Nov 3 03:02:37 <kern.crit> earth /kernel: (sa0:ahc0:0:3:0): tape is
now frozen- use an OFFLINE, REWIND or MTEOM command to clear this
state.
Nov 3 05:02:49 <kern.crit> earth /kernel: (sa0:ahc0:0:3:0): SCB 0x6 -
timed out
Nov 3 05:02:49 <kern.crit> earth /kernel: (sa0:ahc0:0:3:0): Queuing a
BDR SCB
Nov 3 05:02:49 <kern.crit> earth /kernel: (sa0:ahc0:0:3:0): Bus Device
Reset Message Sent
Nov 3 05:02:49 <kern.crit> earth /kernel: (sa0:ahc0:0:3:0): no longer
in timeout, status = 34b
Nov 3 07:02:49 <kern.crit> earth /kernel: (sa0:ahc0:0:3:0): SCB 0xe -
timed out
etc...
With kind regards,
Ben
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