Seagate ST11200N Technical Information PDF herunterladen (Seite 89)

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Configuring Tape Drives

Creating SCSI Robotic Control Device Files

Media Manager requires that device files from the /dev/changer directory are used to

configure SCSI robotic control. These files are created by the operating system at boot

time.

To display devices that are available on the system, use the following command:

# hwmgr -view devices

HWID: Device Name Mfg Model Location

3: /dev/kevm

34: /dev/disk/floppy0c 3.5in floppy fdi0-unit-0

55: /dev/disk/cdrom0c COMPAQ CDR-8435 bus-1-targ-0-lun-0

56: /dev/disk/dsk0c DEC RZ2DD-KS (C) DEC bus-2-targ-0-lun-0

57: /dev/disk/dsk1c DEC RZ2DD-KS (C) DEC bus-2-targ-1-lun-0

58: /dev/disk/dsk2c DEC RZ2DD-KS (C) DEC bus-2-targ-2-lun-0

70: /dev/changer/mc0 C6280-4000 bus-2-targ-3-lun-0

71: /dev/ntape/tape6 Quantum DLT4000 bus-2-targ-4-lun-0

Example of SCSI Robotic Control Device File

The previous output the from hwmgr command shows an HP C6280 robot connected on

bus 2 at SCSI ID 3, lun 0. The corresponding device file is /dev/changer/mc0. This file

should be used to configure the device in Media Manager.

Configuring Tape Drives

Read the following topics if you plan to use tape drives:

Fast-Tape Positioning (locate-block)

For most drive types, Media Manager supports the SCSI locate-block command for

positioning a tape to a specific block.

NetBackup uses the locate-block command by default unless you disable it by

executing the following:

touch /usr/openv/volmgr/database/NO_LOCATEBLOCK

With locate-block positioning disabled, NetBackup uses the

forward-space-file/record method of tape positioning.

Chapter 5, Hewlett-Packard Tru64 75

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Seagate ST11200N Technical Information Seite 89