Using the STK SN6000
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resources are available to satisfy the job. The NetBackup job will encounter a resource
issue when the scheduler initiates a job resulting in an ACS tape mount request. The
mount request will then be re-queued within the ACS robotic process.
Should SN6000 Drives Be Configured as Shared Drives?
The answer depends on how you connect hosts to SN6000 ports. Each SN6000 port
presents a distinct set of logical drives. Drives accessed from different ports have different
ACS drive addresses (ACS, LSM, Panel, and Drive numbers) for each drive, as well as
different serial numbers.
You must enter the Shared Drives license key on each media server where ACS drives in
the SN6000 are configured.
Hosts Connected To a Single Port
If multiple hosts are connected to a single port, the logical drives accessible through that
port are shared among the hosts connected to that port. The drive address and serial
number is the same for each host on that port. In this type of configuration, the drives
should be configured as shared drives in the NetBackup device configuration.
Hosts Connected To Different Ports
If each host is connected to a different port, each host will have its own set of logical drives
and the drives should not be configured as shared drives in the NetBackup device
configuration.
With this type of configuration, the SN6000 hardware is providing drive sharing and the
NetBackup scheduler and robotic drive selection components are unable to avoid
oversubscribing the drives. Tuning of the media mount timeout and backup policy
windows may be needed to avoid backup, restore, or duplication delays, and media
mount time outs.
NetBackup Tuning When Using Different Ports
Since there is a fixed limit for the number of drives that can be in use at any one time in
this type of configuration, you should configure backup windows so the different
NetBackup storage units tied to the same physical drives are active only at
non-overlapping times. Also, raise or set the media mount timeout to infinite to prevent
job failures when the job cannot get a physical drive due to all the drives being busy.
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