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Appendix A: Repairing EFS Filesystem ProblemsWith fsck


The fsck command checks EFS filesystem consistency and sometimes repairs problems that are found. It is not used on XFS filesystems. This appendix describes the messages that are produced by each phase of fsck, what they mean, and what you should do about each one.

The sections in this appendix are:

The following abbreviations are used in fsck error messages:

BLK

block number

DUP

duplicate block number

DIR

directory name

MTIME

time file was last modified

UNREF

unreferenced
The following sections use these single-letter abbreviations:

B

block number

F

file (or directory) name

I

inode number

M

file mode

O

user ID of a file's owner

S

file size

T

time file was last modified

X

link count, or number of BAD, DUP, or MISSING blocks, or number of files (depending on context)

Y

corrected link count number, or number of blocks in filesystem (depending on context)

Z

number of free blocks
In actual fsck output, these abbreviations are replaced by the appropriate numbers.


Initialization Phase
General Errors
Phase 1 Check Blocks and Sizes
Phase 2 Check Pathnames
Phase 3 Check Connectivity
Phase 4 Check Reference Counts
Phase 5 Check Free List
Phase 6 Salvage Free List
Cleanup Phase

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