i386/91236: /dev/nsa0 generates an error on write of second tape
file
Steve Davidson
stevedav at sonic.net
Mon Jan 2 12:10:28 PST 2006
>Number: 91236
>Category: i386
>Synopsis: /dev/nsa0 generates an error on write of second tape file
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-i386
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Jan 02 20:10:04 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Steve Davidson
>Release: 5.4 BETA1
>Organization:
>Environment:
FreeBSD 5.4 BETA1 (default kernal; no kernel builds)
>Description:
If you try to write a second tape file to the tape no-rewind device after you have completed the first write, you will get the error messages listed below and you will not get a second tape file.
% tar cvf /dev/nsa0 file ...works
% tar cvf /dev/nsa0 file ...error, as below
% tail -f /var/log/messages
Jan 1 17:46:09 bayside kernel: (sa0:umass-sim0:0:0:0): WRITE FILEMARKS. CDB: 10 0 0 0 2 0
Jan 1 17:46:09 bayside kernel: (sa0:umass-sim0:0:0:0): CAM Status: SCSI Status Error
Jan 1 17:46:09 bayside kernel: (sa0:umass-sim0:0:0:0): SCSI Status: Check Condition
Jan 1 17:46:09 bayside kernel: (sa0:umass-sim0:0:0:0): ILLEGAL REQUEST asc:50,0
Jan 1 17:46:09 bayside kernel: (sa0:umass-sim0:0:0:0): Write append error
Jan 1 17:46:09 bayside kernel: (sa0:umass-sim0:0:0:0): Retries Exhausted
Jan 1 17:46:09 bayside kernel: (sa0:umass-sim0:0:0:0): failed to write terminating filemark(s)
Jan 1 17:46:09 bayside kernel: (sa0:umass-sim0:0:0:0): tape is now frozen- use an OFFLINE, REWIND or MTEOM command to clear this state.
An 'mt -f /dev/nsa0 rewind' command "unfreezes" the tape for future operations.
Also, an 'mt -f /dev/nsa0 weof' does not create an EOF mark on the tape.
>How-To-Repeat:
Issue two write commands to the '/dev/nsa0' device. E.g. two tar commands to the tape no-rewind device.
>Fix:
Probably, this is a device driver problem. It could be in the tape unit implementation. Check it out.
>Release-Note:
>Audit-Trail:
>Unformatted:
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