Here is the Procedure to Fix a Corrupted BLV (boot logical volume).
AIX Server stop booting if the your BLV is corrupted .By showing the LED value 557.
To fix this Problem , you must boot your machine in maintenance mode, from a CD or tape. If NIM has been set up for a machine, you can also boot the machine from a NIM master in maintenance mode.
We can set the boot list by “ bootlist” Command , or by SMS program.
Some machines support a normal and service boot list. If your model supports this, you will use a function key during bootup to select the appropriate list.
Normally, pressing F5 when you hear the first tones during bootup, will force the machine to check for a bootable CD.
Press the F5 continually ..................
After booting from CD, tape or NIM an Installation and Maintenance Menu is shown and you can startup the maintenance mode.
Access the rootvg,
Then you can repair the boot logical volume with the bosboot command.
Please specify the disk device, for example hdisk0:
Command : -- # bosboot -ad /dev/hdisk0
It is important that you do a proper shutdown. All changes need to be written from memory to disk.
The bosboot command requires that the boot logical volume hd5 exists.
If the BLV not existing ( deleted mistakenly ) you can create it from the scratch.
Please follow the below steps.
1. Boot your machine in maintenance mode (from CD or tape).
2. Create a new hd5 logical volume: one physical partition in size, must be in rootvg. Specify boot as logical volume type.
3. Run the bosboot command as described.
4. Reboot the server run command
# shutdown -Fr
Procedure of re-creating boot logical volume (BLV)
1. Boot your machine in maintenance mode (from CD, tape, or NIM).
2. Create a new hd5 logical volume: one physical partition in size, must be in rootvg. Specify boot as logical volume type. if needed, remove hd5 using # rmlv -f hd5
# mklv -y hd5 -t boot -a e rootvg 1
3. Run the bosboot command as described below.
# bosboot -ad /dev/hdisk0
4. Shutdown -Fr.
