HP B6960-96035 manual Standalone devices, Physical device collision, Preventing collision

Physical device collision

When specifying a device used for backup, you may specify one device name in one backup specification and another device name of the same physical device in a different backup specification. Depending on the backup schedule, this may result in Data Protector trying to use the same physical device in several backup sessions at the same time, thus creating a collision.

Preventing collision

To prevent this collision, specify a virtual lockname in both device configurations. Data Protector checks if the devices have the same lockname and prevents collision.

For example, a DDS device is configured as a compressed device named DDS_C, and as a non-compressed device DDS_NC as shown in Figure 46 on page 160. Specify the same lockname, DDS, for both devices.

Figure 46 Device locking and device names

Standalone devices

What are standalone devices?

Standalone devices are devices with one drive that reads/writes to one medium at time.

Standalone devices are used for small scale backups or special backups. When the medium is full, the operator must manually replace it with a new medium for the backup to proceed.

Data Protector and standalone devices

Once you have connected a device to the system, you use the Data Protector user interface to configure the device for use with Data Protector. To do this, you must first

160 Media management and devices