Appendix A, Media Manager Reference Topics
Mounting and Unmounting of Media
303
◆
The recorded label may assist with media management in the cases where the media
is misplaced, or the barcode or external label is missing or damaged.
Mounting and Unmounting of Media
For robots, Media Manager automatically mounts and unmounts the volume. Operator
intervention is usually required only if the required volume is not in the robot.
For example, if a restore requires a volume that has been removed from a robot (or is
offsite), the Device Monitor will display a mount request. The operator can then locate
and insert the proper volume and resubmit the request using the Device Monitor.
Suspending Media Or Downing Devices
NetBackup can automatically suspend the use of volumes, or down a device if it suspects
failures are due to the volume or the device. The reason for the action is logged in the
NetBackup error catalog (viewable in the Media Logs report or the All Log Entries report).
If Media Manager downs a device it is logged in the system log.
Repeated write failures are usually the cause for setting a volume to the SUSPENDED
state or a device to DOWN. A volume is also set to SUSPENDED if the write failure occurs
in such a way that could make future attempts at positioning unreliable. Write failures are
frequently caused by a tape device with dirty write heads or deteriorating media.
▼
To reverse a suspend or down action
1.
Use the
bpmedia
command to unsuspend the volume.
2.
Use the NetBackup Device Monitor to set the device to Up.
How Media Manager Selects a Drive for a Robotic Mount
Request
When a robotic mount request is issued,
ltid
queries
vmd
on the volume database host(s)
for the media ID that was specified. If the media ID is found,
vmd
returns the location of
the media (which robotic library and the storage slot number, if applicable).
If a drive exists that meets the following criteria, the mount request is forwarded to the
appropriate robotic process.
◆
The drive is configured.
◆
The drive is in the robotic library that contains the media.
Summary of Contents for NetBackupTM 5.0
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