03-01-2008
Tape Library on Aix
I am having my 14 Aix 5.3 servers on bladecenters connected with my Tape Library.
I had a backup scheduled on tape library but after taking backup successfully,
Now,
Question 1:-
I wanted to restore backup but tape library could not recognize the tape and I get I/O error in TSM. I think it is not recognizing the barcode Label on tape though I think it just check in the tape blindly while backup starts. Whats your suggestion on this any solution..?
Question 2:-
Due to above issue I removed my tape drive rmt0 from TSM Server using command
#rmdev –dl rmt0
After that I wanted to reconfigure my tape library so I fired
#cfgmgr
But it does not detects my tape library rmt0
Then I restarted my tape library and issued same commands but same result
#lsdev –Cc tape
does not throw any output
Also in /dev/, rmt0 directory is absent
What can I do to reactivate my tape drives other than rebooting my server (Aix 5.3)?
Please help immediately, thanks in advance.
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st(1M) st(1M)
NAME
st - shared tape administration
SYNOPSIS
device_file
DESCRIPTION
The command provides users with a command-line interface to check the status of a shared tape device or to reclaim a shared tape device
from a host system that has failed while holding a reservation on the shared tape device. The command can also be used for the same pur-
pose on shared library robotic devices. To use the command you must have root user id.
Please see examples below for usage.
Options
recognizes the following options and arguments:
Specifies the tape device file or sctl/esctl pass-through device
file for the shared tape/library device. This parameter is mandatory and will report an error if device_file is omitted.
Allows the user to reclaim a shared tape device or shared
library robotic device in the case where a host failed while holding a reservation on the shared device. This option causes
a bus device reset to be issued to the device specified by the option.
Prints out the current status of the shared tape/library
device specified by the option.
RETURN VALUE
returns 0 upon successful completion and 1 otherwise.
EXAMPLES
The following shows three examples of output from the above command.
The above output indicates that the shared device is reserved by another host and is therefore unavailable at this time.
The above output indicates that the shared device is not ready for use at this time.
The above output indicates that the shared device is ready for use at this time.
To reclaim a shared tape/library device from a failed host, the following command can be used:
WARNINGS
The option must be used with care. When reclaiming devices, it must be ensured that the host from which the device is being reclaimed has
in fact failed, as data may be lost as the result of reclaiming a device that is currently in use by another host.
AUTHOR
was developed by Hewlett-Packard.
SEE ALSO
mt(1), scsi(7), scsi_ctl(7).
st(1M)