fsck_ufs Phase 5: check cylinder groups

This phase checks the free block and used inode maps. It reports error conditions resulting from:

• allocated blocks in the free block maps

• free blocks missing from free block maps

• incorrect total free block count

• free inodes in the used inode maps

• allocated inodes missing from used inode maps

• incorrect total used inode count

fsck_ufs Phase 5 error messages

CG C: BAD MAGIC NUMBER

The magic number of cylinder group C is wrong. This usually indicates that the cylinder group maps have been destroyed. When running interactively, the cylinder group is marked as needing reconstruction. This error is fatal if the filesystem is being preened.

BLK(S) MISSING IN BIT MAPS (SALVAGE)

A cylinder group block map is missing some free blocks. During preening, the maps are reconstructed.

Possible responses to the SALVAGE prompt are:

YES

Reconstruct the free block map.

NO

Ignore this error condition.

SUMMARY INFORMATION BAD (SALVAGE)

The summary information was found to be incorrect. When preening, the summary information is recomputed.

Possible responses to the SALVAGE prompt are:

YES

Reconstruct the summary information.

NO

Ignore this error condition.

FREE BLK COUNT(S) WRONG IN SUPERBLOCK (SALVAGE)

The superblock free block information was found to be incorrect. When preening, the superblock free block information is recomputed.

Possible responses to the SALVAGE prompt are:

YES

Reconstruct the superblock free block information.

NO

Ignore this error condition.