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Hints and Tips 239
8. Check the following files for any modification or problems with
permissions:
/.profile
/etc/environment
/etc/profile
/etc/inittab
In addition, check that the files can be executed without problems, for
example:
/usr/bin/sh /etc/environment
9. Recreate the bootimage:
bosboot -a -d /dev/hdiskx
Where hdiskx is the hard disk containing the boot logical volume. You can
determine which disk has the boot logical volume by running:
lslv -m hd5
The boot disk will be shown in the PV1 column.
If, after trying the above the problem persists, then either contact your
support organization or restore from a system backup.
8.7.3 Recovering a System with No Bootable Media
If your system hangs during the AIX boot process, you can use the CD-ROM
or tape drive to boot into Maintenance mode using suitable media. If your
system hangs and you do not have media, then you can still gain access to a
limited maintenance shell.
By using the hardware diagnostics on the hard drive, you can access an AIX
shell which will allow you access to the file systems in the system. The file
systems will, however, be mounted so you will be unable to run
fsck. From
this shell, you can edit /etc/inittab or do whatever is necessary and possible
to fix the problem. To access the shell, perform the following:
1. Turn on the RS/6000.
2. Press F5 during the firmware boot-up sequence (or 5 on an ASCII
terminal) to enter Service mode.
3. If diagnostics loads, select Service Aids.
4. Select AIX Shell Prompt.
5. Enter the root password.