Seagate ST11200N Technical Information PDF herunterladen (Seite 77)

Configuring Tape Drives

◆ To collect TapeAlert information from tape devices allowing support of functions such

as tape drive cleaning.

◆ For WORM tape support.

◆ Future NetBackup features and enhancements

Note Passthru paths are not supported on HP-PB adapters such as HP 28696A - Wide

SCSI or HP 28655A - SE SCSI.

Automatic Configuration

Because using the passthru path is so important, NetBackup will automatically create the

corresponding passthru path whenever a tape drive is configured with a device file of the

format: /dev/rmt/cCONTROLLERtTARGETdUNITBESTnb.

These paths are created in the /dev/sctl directory, which will also be created if it does

not exist. Passthru paths will also be created automatically whenever the NetBackup

device configuration wizard is run. In either case, NetBackup will not modify or delete

any existing passthru paths. NetBackup assumes that any existing passthru paths were

created correctly.

NetBackup does not detect the type of adapter cards installed in the system, so it will also

create passthru paths for tape drives connected to adapter cards that do not support

passthru. This is expected and will not cause any problems.

It is normally not necessary to manually create passthru paths for tape drives, but the

steps for doing so are provided (see “Enabling Passthru Paths” on page 63).

Enabling Passthru Paths

To enable passthru paths, a device file in the directory /dev/sctl must exist for the tape

drives. Create the device files as shown in the following example.

Note When using the mknod command for tape drives, TARGET is the SCSI ID of the

tape drive not the SCSI ID of the robotic control.

Example:

In this example the robotic control for a ADIC Scalar 100 library is on a SCSI bus with a

instance number of 7 (ext_bus entry, I column), SCSI ID 2 and LUN 0, and the robotic

control for a IBM ULT3583-TL library is on the same SCSI bus at SCSI ID 3 and LUN 0.

The ADIC library contains 2 Quantum Super DLT drives, one with SCSI ID 0, SCSI LUN 0

and the other with SCSI ID 1, SCSI LUN 0.

Chapter 4, Hewlett-Packard HP-UX 63

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Seagate ST11200N Technical Information Seite 77