Seagate ST11200N Información técnica descargar pdf (Pagina 76)

Configuring Tape Drives

4. Create the device file as follows:

mknod /dev/spt/c1t3l0 c 137 0x013000

This command creates the /dev/spt/c1t3l0 device file. Specify this file as the

robot control path when configuring your device under Media Manager.

Configuring Tape Drives

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

Using Berkeley Style Close

The examples in this section show Berkeley-style close for tape drives as indicated by the

letter b after the compression specification. It is mandatory to 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 operations 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 on an HP9000.

Using the Passthru Driver for Tape Drives

The SCSI passthru driver and SCSI passthru device paths are required by NetBackup for

full feature support. Performance will be degraded if SCSI passthru is not provided. The

passthru driver is used

◆ By avrd and robotic processes to scan drives.

◆ By NetBackup and Storage Migrator for locate-block positioning.

◆ By NetBackup and Storage Migrator for SAN error recovery.

◆ By NetBackup and Storage Migrator for Quantum SDLT performance optimization.

◆ By NetBackup and Storage Migrator for SCSI reserve/release.

◆ To set the optical drive type (as explained in “Setting the HP Optical Drive Type in

Nonvolatile Memory” on page 25).

◆ By the NetBackup device configuration GUIs to collect robot and drive information.

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

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Seagate ST11200N Información técnica Pagina 76