December 2001
Intermediate to advanced
506 pages
10h 4m
English
book
IBM eServer Certification Study Guide - pSeries AIX System Administration
by Christian Pruett, Kristian Strickland, Scott Vetter
Content preview from IBM eServer Certification Study Guide - pSeries AIX System Administration
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6.7. Troubleshooting file system problems
This section will discuss some of the problems encountered while managing LVM and how to resolve them.
6.7.1. Recovering from super block errors
If you receive one of the following errors from the fsck or mount commands, the problem may be a corrupted (or dirty) superblock.
fsck: Not an AIX3 file system fsck: Not an AIXV3 file system fsck: Not an AIX4 file system fsck: Not an AIXV4 file system fsck: Not a recognized file system type mount: invalid argument
The problem can be resolved by restoring the backup of the superblock over the primary superblock using one of the following commands:
dd count=1 bs=4k skip=31 seek=1 if=/dev/lv00 of=/dev/lv00
The following command works only for AIX Version 4: ...
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