3-56 IBM Informix OnLine Database Server Administrator’s Guide

Change Tape Size of Archive Tape Device

From the Command Line
1. To change the value ofTAPEBLK from the command line, use an
editor to edit the file specified by$ INFORMIXDIR/etc/$TBCONFIG.
2. Change the value of TAPEBLKto the new block size, expressed in
kilobytes.
Change Tape Size of Archive Tape Device
Thetape size of the archive tape device is specified as TAPESIZE in the config-
uration file. Tape size refers to the maximum amount of data that should be
written to this tape, expressed in kilobytes.
You can change the value ofTAPESIZE while OnLine is in online mode. The
change takes effect immediately.
If the tape device pathname is/dev/null, the tape size is ignored.
Ifyou are logged in as user informix, you can make this change from within
DB-Monitoror from the command line. If you are logged in as root, you must
use the command-line option.
Important: Anytime you change the physical characteristics of the tape device, you
mustcreate a level-0 archive. Otherwise, you might be unable to restore the complete
setof tapes. OnLine cannot switch tape devices during a restore. OnLine will expect
allarchive tapes to have the same block size and tape size as were specified at the time
of the most recent level-0 archive.
From DB-Monitor
1. Fromwithin DB-Monitor, select the Archive menu, Tape-Parameters
option to change the value of TAPESIZE.DB-Monitor displays the
current value.
2. Enterthe new tape size expressed in kilobytes in the Tape Sizefield
that is associated with the Tape Device field.