Create a mksysb tape manually

In preparation for this procedure, perform the following in a different volume group other than rootvg. I used backupsvg with a filesystem called /backups. Make sure you do the following commands in order so that the proper files like /bosinst.data and /image.data are created.

First we create the necessary boot image, bos install image and mksysb image.
mksysb -i -p /backups/xxxxx.mksysb
bosboot -ad /dev/rmt0 -b /backups/codeman.boot
mkinsttape /backups/xxxxx.2nd

Next we restore the mksysb image in preparation for stacking the files onto the tape.
mkdir /backups/root_dir
cd /backups/root_dir
dd if=../xxxxx.mksysb |restore -x -v -f -

Finally we cut the tape placing the boot image(generated by bosboot -b), bosinst image(generated by mkinsttape), dummy image and the mksysb files on it.
tctl -f /dev/rmt0.1 rewind
dd if=/backups/xxxxx.boot of=/dev/rmt0.1 bs=512
dd if=/backups/xxxxx.2nd of=/dev/rmt0.1 bs=512
echo "Dummy Install Image" |dd of=/dev/rmt0.1 bs=512 conv=sync
cd /backups/root_dir
find . -print |backup -i -q -v -f /dev/rmt0.1
tctl -f /dev/rmt0.1 rewind


mksysb -i <filename>
mkinsttape <Full path to file name>
bosboot -ad /dev/rmt0 -b <Full path to file name>

tctl rewind
dd if=<boot file name> of=/dev/rmt0.1 bs=512
dd if=<mkinsttape file name> of=/dev/rmt0.1 bs=512
echo "Dummy Image" |dd of=/dev/rmt0.1 bs=512 conv=sync



To put the 2nd.image on tape that is created using the mkinsttape command use the following. This has been verified.
dd if=/<pathname>/<filename> of=/dev/rmt0.1 bs=512

# chdev -l rmt0 -a block_size=512
# echo "Dummy Install Image" |dd of=/dev/rmt0 bs=512 conv=sync
# tctl rewind
# tctl -f /dev/rmt0.1 fsf 1
# dd if=/tmp/2nd.image of=/dev/rmt0 bs=512
# tctl rewind
# tctl -f /dev/rmt0.1 fsf 2
# echo "Dummy Install Image" |dd of=/dev/rmt0 bs=512 conv=sync
# tctl rewind
# tctl -f /dev/rmt0.1 fsf 3
# dd if=/backup/mksysb.image of=/dev/rmt0 bs=512



some info:
[root@buxxx] /home/mdismail>
 # mkinsttape /tmp/tempmksysbtape
[root@buxxx] /home/mdismail>
 # ls -l /tmp/tempmksysbtape
-rw-------   1 root     system      6144000 Oct 06 05:57 /tmp/tempmksysbtape
[root@buxxx] /home/mdismail>
 # du -sk /tmp/tempmksysbtape
6000    /tmp/tempmksysbtape
[root@buxxx] /home/mdismail>
 # file /tmp/tempmksysbtape
/tmp/tempmksysbtape: backup/restore format file
[root@buxxx] /home/mdismail>
 #


##############
note sure of these steps

mksysb -i <filename>
mkinsttape <Full path to file name>
bosboot -ad /dev/rmt0 -b <Full path to file name>                 /* file generated by mkinsttape  */

tctl rewind
dd if=<boot file name> of=/dev/rmt0.1 bs=512
dd if=<mkinsttape file name> of=/dev/rmt0.1 bs=512
echo "Dummy Image" |dd of=/dev/rmt0.1 bs=512 conv=sync


#########

  2. To create a bootable image called /tmp/tape.bootimage for a tape device,
     type:

     bosboot -ad /dev/rmt0 -b /tmp/tape.bootimage

[root@buxxx] /home/mdismail>
 # bosboot -ad /dev/rmt0 -b /tmp/tape.bootimage

bosboot: Boot image is 30200 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 *****
[root@buxxx] /home/mdismail>
 #

[root@buxxx] /home/mdismail>
 # ls -l /tmp/tape.bootimage
-rw-------   1 root     system     15462339 Oct 06 06:10 /tmp/tape.bootimage
[root@buxxx] /home/mdismail>
 #

[root@buxxx] /home/mdismail>
 # file /tmp/tape.bootimage
/tmp/tape.bootimage: ELF 32-bit MSB version 1 executable PowerPC
[root@buxxx] /home/mdismail>
 #