Bug 24233

This may also need to be cross filed against kernel ...
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Doing an Upgrade from 6.1 to 7.1B2, the upgrade died about 60% through the
upgrade, seemingly due to an uncorrectible media error with the MM media.

Kernel 2.4.0-0.43-12 had been 'upgraded', and as part of the upgrade had 
"rpm -e oldkernel".

This of course removed the old /lib/modules/* tree.

It had NOT done the mkinitrd for the new kernel; this of course requires
the presence of a loop device. (loop driver is present with the upgrade
.img, but was unavailable becuase of the irrecoverable media error -- I
could not get to console 2.)

As such, when I rebooted (the old kernel) in recovery, I was unable to
insmod loop, and walk it through the mkinitrd, and use lilo to recover.  

COMPOUNDING this, the module drivers needed had been prematurely removed.

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This was discussed on tester's list, but seems not to have been RFE'd
formally.

As part of postinst, an immediate (at tome of kernel transfer) four
stepprocess is needed:

1.  ADD, as with an RPM -i a new kernel, and set is as the "lilo.conf"
'default'; spawn out to mkinitrd, and build /boot/initrd-xxx.img, and using
links, link it is as '/boot/initrd-default.img'

[2. option for extra credit -- run mkbootdisk, and save at: 
/boot/recoverydisk-xxx.img; link it as well as: 
'/bootrecoverydisk-default.img ]

3.  RUN lilo, and recover from errors, as needed.

4.  THEN and only then rpm -e the old kernel, and re-fixup lilo.conf --
re-run lilo again with error recovery as needed.

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Link updating logic as needed in /boot/*