Hello All,

I was able to succesfully backup bare AIX5.2 (no ML installed) with
mksysb -i -vmX /dev/rmt0 command.


After system upgrade to ML4 an attemt to create a bootable bakup
resulted in the following message:

# lsdev -Cc tape
rmt0 Available 10-89-00-0,0 Other SCSI Tape Drive
# mksysb -i -m -v -X /dev/rmt0

Creating information file (/image.data) for rootvg..

Creating tape boot image............................................. ......
bosboot: Boot image is 25356 512 byte blocks.

***** ATTENTION *****
The boot image you just created might fail to boot because
the size exceeds the system limit. For information about
fixes or workarounds, see /usr/lpp/bos.sysmgt/README.
***** ATTENTION *****

0301-161 bosboot: dd failed to copy /dev/rmt0.1.

0301-165 bosboot: WARNING! bosboot failed - do not attempt to boot
device.

0512-016 mksysb: Attempt to create a bootable tape failed:
bosboot -d /dev/rmt0.1 -a failed with return code 48.


# mt -f /dev/rmt0 rewind
/dev/rmt0: There is a request to a device or address that does not
exist.
You have mail in /usr/spool/mail/root
# lsdev -Cc tape
rmt0 Defined 10-89-00-0,0 Other SCSI Tape Drive
# mgrcfg
# lsdev -Cc tape
rmt0 Defined 10-89-00-0,0 Other SCSI Tape Drive
# cfgmgr -i /dev/rmt0
cannot open /dev/rmt0: No such device or address
Please mount volume 1 on /dev/rmt0
....and press Enter to continue installp: The specified device
/dev/rmt0
is not a valid device or file.
# lsdev -Cc tape
rmt0 Defined 10-89-00-0,0 Other SCSI Tape Drive

Does anyone has an idea of what is going on and what should be done to
make /dev/rmt0 available? Why whould bootable image exceed system
limit?


Thank you,
Alona