Hello,
I recently noticed some errors in my system log, and had already found a directory
with a few files in it which could not be deleted.
So I downloaded the newest reiserfs tools, compiled them and had a shot at reiserfsck
--fix-fixable.
Big mistake. My 60GB filesystem had gone from slightly corrupt to becoming completely
unmountable by doing this.
Some further analysis led me to the conclusion that *all* fields for nlink had become
'0' (something I suppose shouldn't happen).
reiserfsprogs 3.6.3
filesystem version 3.6, created with something from 2.4.16 to .18
gcc used to compile: version 3.1.1 20020722 (prerelease) (SuSE Linux)
kernel 2.4.19 (compiled with same gcc)
What went wrong here?
Will reiserfsck --rebuild-tree fix this? Or is the error some compilation thing?
What are my chances to recover the filesystem?
Regards,
- Gerrit
--
luna:/ # mount /home
mount: Not a directory
-- /var/log/messages
Aug 15 19:40:51 luna kernel: reiserfs: found format "3.6" with standard journal
Aug 15 19:40:51 luna kernel: reiserfs: checking transaction log (ide0(3,9)) for
(ide0(3,9))
Aug 15 19:40:51 luna kernel: reiserfs: using ordered data mode
Aug 15 19:40:51 luna kernel: vs-13075: reiserfs_read_inode2: dead inode read from disk
[1 2 0x0 SD]. This is likely to be race with knfsd. Ign
ore
Aug 15 19:40:51 luna kernel: Using r5 hash to sort names
-- reiserfsck output
/ 1 (of 4)/ 1 (of 159)/ 1 (of 169)bad_stat_data: block 8232, [1 2 0x0 SD (0)],
directory SD has bad nlink number
bad_stat_data: block 8232, [2 3 0x0 SD (0)], directory SD has bad nlink number
bad_stat_data: block 8232, [2 13 0x0 SD (0)], directory SD has bad nlink number
bad_stat_data: block 8232, [2 14 0x0 SD (0)], directory SD has bad nlink number
/ 2 (of 169)bad_stat_data: block 8233, [2 132 0x0 SD (0)], directory SD has bad nlink
number
bad_stat_data: block 8233, [2 1855 0x0 SD (0)], directory SD has bad nlink number
/ 5 (of 169)bad_stat_data: block 8755, [2 3793 0x0 SD (0)], directory SD has bad
nlink number
-- ALL values of nlink are 0:
luna:/ # zcat /home.debugreiserfs.log.gz | grep "nlink" | awk '{print $8}' | sort |
uniq -c
382201 0,
-- debugreiserfs output
Filesystem state: consistency is not checked after last mounting
Reiserfs super block in block 16 on 0x309 of format 3.6 with standard journal
Count of blocks on the device: 17638606
Number of bitmaps: 539
Blocksize: 4096
Free blocks (count of blocks - used [journal, bitmaps, data, reserved] blocks): 4826281
Root block: 39819
Filesystem is cleanly umounted
Tree height: 5
Hash function used to sort names: "r5"
Objectid map size 972, max 972
Journal parameters:
Device [0x0]
Magic [0x38906a00]
Size 8193 blocks (including 1 for journal header) (first block 18)
Max transaction length 1024 blocks
Max batch size 900 blocks
Max commit age 30
Blocks reserved by journal: 0
Fs state field: 0x1
sb_version: 2
inode generation number: 12589619
UUID: 00000000-0000-0000-0000-000000000000
LABEL:
Set flags in SB:
INTERNAL NODE (39819) contains level=4, nr_items=3, free_space=3992 rdkey
PTR 0: [dc_number=8387, dc_size=3800] KEY 0: 68140 71445 0x1a07001 IND (1) PTR 1:
[dc_number=713991, dc_size=2864] KEY 1: 1671434 1672343 0x4a
...
===================================================================
LEAF NODE (8232) contains level=1, nr_items=8, free_space=128 rdkey (real items 8)
-------------------------------------------------------------------------------
|###|type|ilen|f/sp| loc|fmt|fsck| key |
| | | |e/cn| | |need| |
-------------------------------------------------------------------------------
| 0|1 2 0x0 SD (0), len 44, location 4052 entry count 0, fsck need 0, format new|
(NEW SD), mode drwxr-xr-x, size 1408, nlink 0, mtime 07/19/2002 03:02:40 blocks 3, uid 0
-------------------------------------------------------------------------------
| 1|1 2 0x1 DIR (3), len 1408, location 2644 entry count 51, fsck need 0, format old|
###: Name length Object key Hash Gen number
0: ". "( 1) 1 2 0 1, loc 1400,
state 4 not set
1: ".. "( 2) 0 1 0 2, loc 1392,
state 4 not set
...
49: "lost+found "( 10) 2 26247 2077744896 0, loc 832,
state 4 "r5"
50: "bigfiles.list "( 13) 2 2241662 2088467072 0, loc 816,
state 4 "r5"
-------------------------------------------------------------------------------
| 2|2 3 0x0 SD (0), len 44, location 2600 entry count 65535, fsck need 0, format new|
(NEW SD), mode drwxr-xr-x, size 264, nlink 0, mtime 06/25/2000 19:48:19 blocks 1, uid 0
-------------------------------------------------------------------------------
| 3|2 3 0x1 DIR (3), len 264, location 2336 entry count 11, fsck need 0, format old|
###: Name length Object key Hash Gen number
0: ". "( 1) 2 3 0 1, loc 256,
state 4 not set
1: ".. "( 2) 1 2 0 2, loc 248,
state 4 not set
2: "at "( 2) 3 5 208896 0, loc 240,
state 4 "r5"
3: "kbd "( 3) 3 8 2494720 0, loc 232,
state 4 "r5"
4: "bash "( 4) 3 6 25360384 0, loc 224,
state 4 "r5"
...
