About the NetBackup sg driver
NetBackup provides its own SCSI pass-through driver to communicate with SCSI-controlled robotic peripherals. This driver is called the SCSA (generic SCSI pass-through driver), also referred to as the sg driver.
For full feature support, NetBackup requires the sg driver and SCSI pass-through device paths.
Install the NetBackup sg driver on each Solaris NetBackup media server that hosts tape devices. Each time you add or remove a device, you should reinstall the sg driver again.
If you do not use a pass-through driver, performance suffers.
NetBackup uses the pass-through driver for the following:
By avrd and robotic processes to scan drives.
By NetBackup to position tapes by using the locate-block method.
By NetBackup for SAN error recovery.
By NetBackup for Quantum SDLT performance optimization.
By NetBackup for SCSI reservations.
By NetBackup device configuration to collect robot and drive information.
To collect Tape Alert information from tape devices allowing support of functions such as tape drive cleaning.
For WORM tape support.
Future NetBackup features and enhancements
Note:
Because NetBackup uses its own pass-through driver, NetBackup does not support the Solaris sgen SCSI pass-through driver.
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