System Administration Guide

Phase 5: Check Cylinder Groups Messages

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

The possible error messages displayed in this phase are referenced below.

BLK(S) MISSING IN BIT MAPS (SALVAGE)
CG character-for-command-option: BAD MAGIC NUMBER
SUMMARY INFORMATION BAD (SALVAGE)
number-of files, number-of-files used, number-of-files free (number-of frags, number-of blocks, percent fragmentation)
***** FILE SYSTEM WAS MODIFIED *****
filename FILE SYSTEM STATE SET TO OKAY
filename FILE SYSTEM STATE NOT SET TO OKAY

BLK(S) MISSING IN BIT MAPS (SALVAGE)

Reason Error Occurred	How to Solve the Problem
A cylinder group block map is missing some free blocks. During preening, `fsck` reconstructs the maps.	To reconstruct the free-block map, type `y` at the `SALVAGE` prompt. To ignore this error condition, type `n`.

CG character-for-command-option: BAD MAGIC NUMBER

Reason Error Occurred	How to Solve the Problem
The magic number of cylinder group `character-for-command-option` is wrong. This error usually indicates that the cylinder group maps have been destroyed. When running interactively, the cylinder group is marked as needing reconstruction. `fsck` terminates if the file system is being preened.	If this occurs, contact your local service provider or another qualified person.

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

Reason Error Occurred	How to Solve the Problem
The actual count of free blocks does not match the count of free blocks in the superblock of the file system. If the `-o p` option was specified, the free-block count in the superblock is fixed automatically.	To reconstruct the superblock free-block information, type `y` at the `SALVAGE` prompt. To ignore this error condition, type `n`.

SUMMARY INFORMATION BAD (SALVAGE)

Reason Error Occurred	How to Solve the Problem
The summary information is incorrect. When preening, `fsck` recomputes the summary information.	To reconstruct the summary information, type `y` at the `SALVAGE` prompt. To ignore this error condition, type `n`.