IBM RS/6000 - Manual (Page 111)

5.4.4.1 Restoring to Different Machines
Creating a mksysb on one machine and using the backup to install several other
machines can be useful and will save the time taken to perform multiple
installations. A problem with this is that the mksysb may not contain enough device
drivers to be able to run on the target machine. If you are going to restore a
mksysb from one machine to another, always check to see that all the required
device drivers are installed.
With regards to the E20 and F30, we used one of each machine with similar
configurations. Both machines had a PCI token-ring card, S15 graphics adapter,
CD-ROM, 4mm tape drive, and internal disk attached. We first installed the E20
with AIX Version 4.1.4 and the server bundle and configured TCP/IP. We then
created a mksysb on the E20 and restored it to the F30. After reconfiguring
TCP/IP and changing the /etc/hosts file, the F30 worked without any further
modifications to the operating system.
5.4.5 Creating System Backups on Microchannel-Based RS/6000
Systems
As previously mentioned, mksysb tapes created on microchannel-based RS/6000
systems will not boot on PCI-Based RS/6000 Systems. There is, however, a way
to get around this problem by editing the
mksysb script in /usr/bin. Although the
mksysb command is unable to create tapes which will restore to different RS/6000
architectures, the bosboot command has an option, -T , which allows you to specify
which type of boot image you wish to create. Normally, when the bosboot
command is run, it obtains the platform type from the bootinfo -T command
automatically. Using this platform type, it creates a boot image for the specific
platform type the command is run from. By editing the mksysb shell script, you can
change the line which calls the
bosboot command to include the -T flag and
therefore specify what type of boot image you wish to create.
To edit the mksysb script on a microchannel-based RS/6000 system, perform the
following steps:
1. Locate the mksysb script in /usr/bin. Make a backup copy of this file.
2. In the mksysb script, change the line:
${bosboot} -d$device -a $KERNEL
to
${bosboot} -d$device -a $KERNEL -T rspc
Figure 29 on page 88 shows the line, highlighted, to be edited in the mksysb
script:
Chapter 5. AIX Version 4.1.4 Support 87