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Configuring Tape Drives

Example 7 (Fujitsu M8100 Stackers)

The robotic control for the Fujitsu M8100 stacker is TSH. The unit must be set up to run in

SYSTEM Mode and 2LUN Mode. See the M8100 Cartridge Tape Drive product guide

supplied with the unit for information on setting the library modes.

The robotic control is LUN 1 of the drive's SCSI ID. The SCSI ID's are viewed and

configured by using the front panel on the stacker.

Assume a configuration as follows:

# /usr/openv/volmgr/bin/sgscan

/dev/sg/c1t0l0: Tape (/dev/rmt/0): "FUJITSU M8100AA2"

/dev/sg/c1t0l1: Changer: "FUJITSU M8100AA2"

If the drive is SCSI ID 0, the robotic control for the stacker is /dev/sg/c1t0l1.

Configuring Tape Drives

Read the following topics if you plan to use any peripheral with physical or virtual tape

drives.

Using Berkeley-Style Close

The examples in this section use Berkeley-style close for tape drives. This is indicated by

the letter b after the density specification. You must specify Berkeley-style close for tape

devices that you configure under Media Manager.

The terms Berkeley-style close and AT&T style close refer to where a tape is left logically

positioned after a close operation (in relation to a tape mark). One style leaves an

application logically positioned before a tape mark and the other leaves it after.

Applications must assume where the tape is left after a close in order to establish the

correct orientation the next time they do a tape-position or read operation. Some

operating systems allow tape devices to be configured with either type of close.

NetBackup assumes it is using Berkeley-style close.

Fast-Tape Positioning (locate-block)

For AIT, DLT, Exabyte, DTF, and half-inch tape drives, Media Manager supports the SCSI

locate-block command for positioning to a specific block on a tape. This approach

improves tape-positioning greatly over the alternative method.

16 NetBackup Media Manager Device Configuration Guide for UNIX, Windows, and Linux

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