AIX LUN increase in 7 easy steps :)

1. Check rootvg disks:

# lsvg -p rootvg

2. Check bootlist:

# bootlist -m normal -o

3. For each disk do the following steps:

X and Y has to be replaced by correct numbers (for hdisk and dumplv)

a. Check LVs from one of the disks:

# lspv -l hdiskX

b. Unmirror the disk:

# unmirrorvg -c 1 rootvg hdiskX

c. Check remaining LVs on the disk:

# lspv -l hdiskX
- only dump LV should remain on the PV
- if there are onther LV's move them to the other disk:
# migratepv -l LVNAME hdiskX hdiskY

d. Deactivate the dumplv from this disk:

- view the current configuarion:
# sysdumpdev -l
- in case of primary dumplv is on this disk:
# sysdumpdev -P -p /dev/sysdumpnull
- in case of secondary dumplv is on this disk:
# sysdumpdev -P -s /dev/sysdumpnull

e. Remove the dumplv:

# rmlv lvdumpX

f. Remove hdisk from rootvg:

# reducevg rootvg hdiskX

g. Check disk size:

# bootinfo -s hdiskX

h. Integrate the disk back rootvg:

# extendvg rootvg hdiskX

i. Mirror rootvg (the syncking will be done in the background):

# mirrorvg -S -c 2 -m rootvg hdiskX

j. Verify that all LV's are synked:

# lsvg -l rootvg
- this operation could take a long time
- repeat this checking untill all LV's are open/syncd
- to force the sync of an LV you can use:
# syncvg -l lvname

k. Recreate the dump LV:

# mklv -t sysdump -u 1 -y lvdumpX rootvg 12 hdiskX
- size can be different depending on the estiomation:
# sysdumpdev -e

l. Enable dumplv:

# sysdumpdev -l
- in case of primary dumplv is on this disk:
# sysdumpdev -P -p /dev/dumplvX
- in case of secondary dumplv is on this disk:
# sysdumpdev -P -s /dev/dumplvX

m. Check that rootvg is fully mirrored ansd syncked:

# lsvg -l rootvg

4. Repeat steps 3 for the other disk

5. Correct bootlist like it was before:

# bootlist -m normal hdiskX hdiskY

6. Verify bootlist:

# bootlist -m normal -o

7. Rebuild bosboot to be sure:

# bosboot -a