How to deal with NBU freezing media

When dealing with frozen tapes, you should first understand:

Yes. The frozen state is stored in MediaServer's MediaDB, and each MasterSErver and MediaServer has its own MediaDB.

. You can obtain MEdiaDB information through the bpmedialist command, including (frozen, full, active).

Freezing can only be performed by the bpmedia command.

Just because a tape is frozen doesn't mean it is defective. Freezing tapes is NBU's security measure, which can prevent further errors, equipment damage or possible data loss.

Learn about the relevant tapes, drives or media servers.

These logs are useful when dealing with frozen tapes:

Bptm login. MediaServer:/usr/openv/net backup/logs/bptm。

. Operating system system log

These codes may cause or be caused by belt freezing:

84-Media Write Error

This status code appears when the media freezes if the tape unit cannot read or write to the tape correctly.

86-Media location error

This status code appears when the media freezes if the tape unit cannot read or write to the tape correctly.

96-Unable to allocate new media.

If the media continues to freeze, the backup job may end in state 96 because there is no more media available for mounting.

Possible reasons for freezing:

1. Too many backup errors (dirty drive, scsi communication, hardware compatibility, tape compatibility ...) are reported on the same media.

2. Unexpected tape in the drive (wrong tape, unconfigured drive ...)

3. The tape contains non-NBU format.

(It can be defined in/usr/openv/netbackup/bp.conf..

Allow _ Media _ Overwrite = DBR

Allow media overwrite = TAR

Allow _ Media _ Overwrite = CPIO

Allow _ Media _ Overwrite = ANSI

ALLOW _ MEDIA _ OVERWRITE = MTF 1

ALLOW _ MEDIA _ OVERWRITE = BE-MTF 1

4. Cataloging backup tapes with NBU.

In this case, you need to use the bplabel command to reset the lead.

5. Artificial freezing

For example, for administrative reasons, use the bpmedia command to freeze the band.

6. The tape is write-protected

Writing will be blocked and Netbackup will freeze it.

How to thaw a frozen belt?

. Use the bpmedia command:

For UNIX

/usr/openv/net backup/bin/admin cmd/BP media-unfreeze-m & lt； mediaID & gt-h & lt； Name of the media server where the media is frozen & gt

For Windows

& lt installation path & gt \ VERITAS \ netbackup \ bin \ admincmd \ bpmedia-unfreeze-m < mediaID & gt-h & lt； Name of the media server where the media is frozen & gt

. You can use the bpmedialist command to see which server is frozen:

For UNIX

/usr/openv/net backup/bin/admin cmd/bpmedialist-m & lt； mediaID & gt

For Windows

& lt installation path & gt \ VERITAS \ netbackup \ bin \ admincmd \ BP media list-m < mediaID & gt