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Formating a bad jfslog

Troubleshooting

Formating a bad jfslog

by  MoshiachNow  Posted    (Edited  )
Format jfslog.

If the jfslog has been damaged for any reason, it will cause the filesystems to not be mounted.
Assume the filesystem /dataVolumes/proof7.2.0 fails to mount and fsck does not help.
Find out the name of the jfslog that belongs to this filesystem:

# lsvg -l svg2

svg2:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
slv2.0 jfs 1080 1080 2 open/syncd /dataVolumes/proof7.2.0
loglv02 jfslog 1 1 1 open/syncd N/A

we will reformat the jfslog. Enter:

1.all filesystems associated with the jfslog *must* be unmounted prior to running logform !

2. logform /dev/loglv02

This command will ask the horrible question "Do you wish to destroy the log?". Just say yes. This will get you a new, clean jfslog.
Then we'll run fsck on this filesystem to ensure it's back.
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