Editing Solaris Boot CD slices.

Solaris boot iso's can contain several slices. Those slices are usually not acessable unless you burn the iso to a cd. But that is a waste of cd's, and I have to walk round to the server room to constantly insert in new discs.

I need to be able to modify the Solaris boot cd's to do some custom stuff during the boot process, so I need to be able to edit the disc, and then put it all back together into an iso again.

Using the info at Jumpstart server from ISO’s I created a slightly more complicated program to extract all the slices. This should produce an output with the same values that of prtvtoc does.


# ./extractslices.ksh ./sol-8-hw4-sparc-v1.iso ./sol-8-hw4-sparc-v1-s
Examining ./sol-8/sol-8-hw4-sparc-v1.iso
Partition       Start   Length  File
   0            0       1006720 ./sol-8-hw4-sparc-v1-s0
   1            1006720 184320  ./sol-8-hw4-sparc-v1-s1
   2            1191040 5120    ./sol-8-hw4-sparc-v1-s2
   3            1196160 5120    ./sol-8-hw4-sparc-v1-s3
   4            1201280 5120    ./sol-8-hw4-sparc-v1-s4
   5            1206400 5120    ./sol-8-hw4-sparc-v1-s5
   6            0       0       Zero Length Partition
   7            0       0       Zero Length Partition


Then to do the edits...


# lofiadm -a /sol-8-hw4-sparc-v1-s1 /dev/lofi/1
# mount -F ufs /dev/lofi/1 /mnt


Make edits to /mnt


# umount /mnt
# lofiadm -d /dev/lofi/1
# cat sol-8-hw4-sparc-v1-s* > newcd.iso


Burn and go!