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*If there is no appendable volume of the appropriate pool available (and if you
enabled auto media management), Backup recycles and then writes to a
mounted, recyclable volume from the appropriate pool as a second choice.
(Backup does not consider writing to a mounted, recyclable volume that
belongs to a different pool.)
*If no volumes of the pool are available (and if you did not enable auto media
management), Backup labels, mounts, and writes to a new, unlabeled volume
or a volume that does not have a Backup label.
The volume label time, which is the time when the volume was labeled
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*
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Volumes with the oldest label time are selected before volumes that were labeled
more recently.
*The number of sessions currently writing to the device
If Backup cannot find a mounted volume from the appropriate pool, a mount
request is initiated. If auto media management is not enabled or if Backup has only
standalone devices available, mount requests continue to be generated until a
volume is mounted and backup can begin.
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The auto media management feature gives Backup automatic control over media
loaded in the storage device. If you enable the auto media management feature in
the Devices resource, Backup automatically labels, mounts, and overwrites a volume
it considers unlabeled, and automatically recycles volumes eligible for reuse that are
loaded into the device. The auto media management feature is only enabled for
standalone devices in the Devices resource. To enable auto media management for
devices in an autochanger, see "Auto Media Management With Autochanger
Devices" on page 136.
Backup considers a volume unlabeled in the following conditions:
*The volume has no internal label.
*The volume is labeled with information other than a recognizable Backup label.
*The volume is labeled with a Backup label, but the density indicated on the
internal label differs from the density of the device where the volume is mounted.
Because the auto media management feature can relabel a volume with a different
density, it is possible to inadvertently overwrite data that still has value. For this
reason, be careful if Backup volumes are shared between devices with different
densities.
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If you do not enable the auto media management feature,
media and does not consider it for backup.
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Backup ignores unlabeled
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Solstice Backup 5.1 Administration Guide*April 1998
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76
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