IBM 000-8697 Manual Do Utilizador

Installation and Initial Configuration

The default value of

TAPEDEV

 is /dev/tapedev.

You can set the value of

TAPEDEV

 to /dev/null if you are testing or proto-

typing an application, or if you are using OnLine in a learning environment.
During OnLine operation, some tasks require that you create an archive. If
you set

TAPEDEV

 to /dev/null, you can create an archive instantly, without

overhead. However, you are not archiving your OnLine data. You cannot
perform a restore.

You can set the value of

TAPEDEV

 to specify a tape device on another host

machine and create archives across your network. For instructions on how to
do this, refer to

Tape devices that do not rewind automatically before opening and on closing
are considered incompatible with OnLine operation.

TAPEBLK

 specifies the block size of the archive tape device, in kilobytes.

Specify the largest block size permitted by your tape device. If the tape device
pathname is /dev/null, the block size is ignored. The default value of

TAPEBLK

 is 16

KB

.

TAPESIZE

 specifies the maximum amount of data that should be written to

each tape, expressed in kilobytes. If the tape device pathname is /dev/null,
the tape size is ignored. The default value of

TAPESIZE

 is 10,240

KB

.

This section describes how to assign values to the logical log backup tape
device parameters. Refer to

for a complete list of logical log admin-

istration topics related to logical log backups.

As OnLine administrator, you are responsible for the prompt back up of the
logical log files. The logical log backup tapes, along with the archive tapes,
constitute a complete copy of your OnLine data.