tape backup
John Horton found ontape -s -L 0 to a SCSI tape on /dev/st0 finished in seconds, reported 100 percent archived, yet nothing was on the tape. Rudy Fernandes suggested testing with a Unix file as TAPEDEV, Paul Watson suggested archecker, and Art Kagel suspected TAPEDEV pointed to /dev/null. No outcome was reported.
Auto-generated by Claude from the posts below — may be imperfect; read the full thread.
hi,
i am a little concerned about my tape backup device. i have it set up on
channel 4 off the scsi card (adaptec 2940) on dev/st0.
there are no errors when i perform an ontape -s -L 0 *but* the archive
only takes a few seconds and the program returns that the database is
100% archived. when checking the tape i see that ontape is quite clearly
lying as no backup has been made. has anyone else had this problem, or
problems generally with tape devices (surestore tape 6000), as i am a
little flumoxed :}
--
John Horton DBA Cognito (Informix on Linux)
john.horton@cognito.co.uk
...and now, you're gonna dance like you've never danced before...
1. How does the tape device respond to System backups?
2. Change TAPEDEV to a unix file (full path, 660, informix:informix) and
check whether ontape does its job.
Rudy
johnh wrote:
> hi,
> i am a little concerned about my tape backup device. i have it set up on
> channel 4 off the scsi card (adaptec 2940) on dev/st0.
> there are no errors when i perform an ontape -s -L 0 *but* the archive
> only takes a few seconds and the program returns that the database is
> 100% archived. when checking the tape i see that ontape is quite clearly
> lying as no backup has been made. has anyone else had this problem, or
> problems generally with tape devices (surestore tape 6000), as i am a
> little flumoxed :}
>
> --
> John Horton DBA Cognito (Informix on Linux)
> john.horton@cognito.co.uk
>
> ...and now, you're gonna dance like you've never danced before...
run archecker against the backup????
johnh wrote:
>
> hi,
> i am a little concerned about my tape backup device. i have it set up on
> channel 4 off the scsi card (adaptec 2940) on dev/st0.
> there are no errors when i perform an ontape -s -L 0 *but* the archive
> only takes a few seconds and the program returns that the database is
> 100% archived. when checking the tape i see that ontape is quite clearly
> lying as no backup has been made. has anyone else had this problem, or
> problems generally with tape devices (surestore tape 6000), as i am a
> little flumoxed :}
>
> --
> John Horton DBA Cognito (Informix on Linux)
> john.horton@cognito.co.uk
>
> ...and now, you're gonna dance like you've never danced before...
--
Paul Watson #
WF Software Ltd # You are only young once
Tel: +44 1436 674729 # but you can be immature
Fax: +44 1436 678693 # for ever
www.wfsoftware.com #
johnh wrote:
>
> hi,
> i am a little concerned about my tape backup device. i have it set up on
> channel 4 off the scsi card (adaptec 2940) on dev/st0.
> there are no errors when i perform an ontape -s -L 0 *but* the archive
> only takes a few seconds and the program returns that the database is
> 100% archived. when checking the tape i see that ontape is quite clearly
> lying as no backup has been made. has anyone else had this problem, or
> problems generally with tape devices (surestore tape 6000), as i am a
> little flumoxed :}
Looks to me like the ONCONFIG file parameter TAPEDEV is pointing to
/dev/null rather than to /dev/st0!
--
Art S. Kagel & Family
kagel@erols.com