Following is the procedure for creating a bootable tape, which you might use to maintain your AIX Version 4.3 Base Operating System (BOS). The tape works only with a copy of BOS that is the same version as the BOS used to create them. Earlier versions of BOS required bootable diskettes. To create bootable diskettes for an earlier version, refer to the documentation for that version.
cp /var/adm/ras/bosinst.data /bosinst.dataor enter:
cp /usr/lpp/bosinst/bosinst.template /bosinst.data
Note: This file is created by the mksysb command.
To check the Tape Device Block size, enter:
tctl -f /dev/rmtTapeDriveName statuswhere rmt TapeDriveName is the name of the tape drive you are using (for example, rmt0 ).
To change the Tape Device Block size, enter:
chdev -l rmtTapeDriveName -a block_size=512
tctl -f/dev/rmtTapeDriveName rewind
bosboot -ad /dev/rmtTapeDriveName.1
chdev -l rmtTapeDriveName -a block_size=BlockSizewhere BlockSize is the previous Tape Device Block size.