09-23-2012
You mention that there is now nothing in /dev/rmt.
Numerous times I have seen a patching operation wipe out network gateway and default router files information but I have not seen it affect tape library configurations. However I guess that it's possible that the /dev/rmt 'special node' files are all that is missing. Do you have any other backup of this system other than on the library that you cannot communicate with? If so, you could try restoring /dev/rmt/*
If it's only the /dev/rmt device node that's missing you might just be able to communicate with the library again.
What backup software are you using? Do you know how the tape library was configured in the first place and where its configuration files are?
I know that NetBackup can lose communication with a library but NetBackup provides a button within to rescan for devices and doing that normally fixes things.
As others have mentioned, recheck firmware levels, et al. Also, no harm in continuing with the full recommended patchset.
Also, as someone else has said, what about the library device firmware level; perhaps that's too old.
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LEARN ABOUT CENTOS
backup_delhost
BACKUP_DELHOST(8) AFS Command Reference BACKUP_DELHOST(8)
NAME
backup_delhost - Deletes a Tape Coordinator entry from the Backup Database
SYNOPSIS
backup delhost -tapehost <tape machine name>
[-portoffset <TC port offset>] [-localauth]
[-cell <cell name>] [-help]
backup delh -t <tape machine name>
[-p <TC port offset>]
[-l] [-c <cell name>] [-h]
DESCRIPTION
The backup delhost command deletes the indicated Tape Coordinator entry from the Backup Database. It is then impossible to submit backup
operations to that Tape Coordinator, even if it is still running. To keep configuration information consistent, also remove the
corresponding entry from the /var/lib/openafs/backup/tapeconfig file on the Tape Coordinator machine.
To list the Tape Coordinator machines and port offsets defined in the Backup Database, issue the backup listhosts command.
OPTIONS
-tapehost <tape machine name>
Specifies the hostname of the machine housing the Tape Coordinator to delete.
-portoffset <TC port offset>
Specifies the port offset number of the Tape Coordinator to delete. If omitted, it defaults to 0. If provided, it is an integer
between 0 (zero) and 58510, and must match the port offset number assigned to the same combination of Tape Coordinator and tape device
or file in the /var/lib/openafs/backup/tapeconfig file on the Tape Coordinator machine indicated by the -tapehost argument.
-localauth
Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. The backup command interpreter presents it to
the Backup Server, Volume Server and VL Server during mutual authentication. Do not combine this flag with the -cell argument. For more
details, see backup(8).
-cell <cell name>
Names the cell in which to run the command. Do not combine this argument with the -localauth flag. For more details, see backup(8).
-help
Prints the online help for this command. All other valid options are ignored.
EXAMPLES
The following command deletes the Backup Database entry for the Tape Coordinator with port offset 2 on the Tape Coordinator machine
"backup3.abc.com":
% backup delhost -tapehost backup3.abc.com -portoffset 2
PRIVILEGE REQUIRED
The issuer must be listed in the /etc/openafs/server/UserList file on every machine where the Backup Server is running, or must be logged
onto a server machine as the local superuser "root" if the -localauth flag is included.
SEE ALSO
backup(8), backup_addhost(8), backup_listhosts(8)
COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas
Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
OpenAFS 2012-03-26 BACKUP_DELHOST(8)