JFSファイルシステムの修復

今日仕事から帰ってきたらここ数日また気になっていたCPUの熱のせいかPCがフリーズしていた。
なにも出来ないのでハードリセットかけると、データ保存用のHDDがmountできない。
ということでJFSファイルシステムの修復を行ったのでメモ。

とりあえずdmesgを見てみるがよく分からない。

# dmesg |tail
[ 3047.460066] ata1.00: detaching (SCSI 0:0:0:0)
[ 3047.460287] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 3047.460700] sd 0:0:0:0: [sda] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK,SUGGEST_OK
[ 3047.460704] sd 0:0:0:0: [sda] Stopping disk
[ 3047.460711] sd 0:0:0:0: [sda] START_STOP FAILED
[ 3047.460712] sd 0:0:0:0: [sda] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK,SUGGEST_OK
[ 3050.381083] ata1: exception Emask 0x10 SAct 0x0 SErr 0x4040000 action 0xe frozen
[ 3050.381088] ata1: irq_stat 0x00000040, connection status changed
[ 3050.381091] ata1: SError: { CommWake DevExch }
[ 3050.381096] ata1: hard resetting link

パーティションは見えている。

# fdisk -l /dev/sda

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x6ac3085b

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1      121601   976760001   83  Linux

jfs_fsckと言うコマンドで修復できるのだけどパッケージが良く分からない。
とりあえずJFS関係で必要そうなのをインストールしてみる

# aptitude install jfsutils

チェックをしてみると、あきらかにエラーが出ている。

# jfs_fsck -n /dev/sda1
jfs_fsck version 1.1.12, 24-Aug-2007
processing started: 8/20/2009 19.32.6
The current device is:  /dev/sda1
Block size in bytes:  4096
Filesystem size in blocks:  244190000
 **Phase 1 - Check Blocks, Files/Directories, and  Directory Entries
 **Phase 2 - Count links
 **Phase 3 - Duplicate Block Rescan and Directory Connectedness
 **Phase 4 - Report Problems
 **Phase 5 - Check Connectivity
 **Phase 6 - Perform Approved Corrections
 **Phase 7 - Verify File/Directory Allocation Maps
Errors detected in the Fileset File/Directory Allocation Map control information. (F)
Errors detected in the Fileset File/Directory Allocation Map. (F)
 **Phase 8 - Verify Disk Allocation Maps
Incorrect data detected in disk allocation control structures.
976760000 kilobytes total disk space.
    10091 kilobytes in 1015 directories.
974728464 kilobytes in 87633 user files.
        0 kilobytes in extended attributes
   208075 kilobytes reserved for system use.
  1833552 kilobytes are available for use.
File system checked READ ONLY.
Filesystem is dirty.
Filesystem is dirty but is marked clean.  In its present state,
the results of accessing /dev/sda1 (except by this utility) are undefined.

修復を試みる。

# jfs_fsck -v -f /dev/sda1
jfs_fsck version 1.1.12, 24-Aug-2007
processing started: 8/20/2009 19.34.17
The current device is:  /dev/sda1
Open(...READ/WRITE EXCLUSIVE...) returned rc = 0
Primary superblock is valid.
The type of file system for the device is JFS.
Block size in bytes:  4096
Filesystem size in blocks:  244190000
 **Phase 0 - Replay Journal Log
LOGREDO:  Allocating for ReDoPage:  (d) 4096 bytes
LOGREDO:  Allocating for NoDoFile:  (d) 4096 bytes
LOGREDO:  Allocating for BMap:  (d) 502032 bytes
LOGREDO:  Allocating for IMap:  (d) 18464 bytes
LOGREDO:  Allocating for IMap:  (d) 2048 bytes
LOGREDO:  Allocating for IMap:  (d) 2048 bytes
LOGREDO:  Allocating for IMap:  (d) 2048 bytes
LOGREDO:  Allocating for IMap:  (d) 2048 bytes
LOGREDO:  Allocating for IMap:  (d) 2048 bytes
LOGREDO:  Allocating for IMap:  (d) 2048 bytes
LOGREDO:  Allocating for IMap:  (d) 2048 bytes
LOGREDO:  Allocating for IMap:  (d) 2048 bytes
LOGREDO:  Allocating for IMap:  (d) 2048 bytes
LOGREDO:  Allocating for IMap:  (d) 2048 bytes
〜略〜
LOGREDO:  Beginning to update the Inode Allocation Map.
LOGREDO:  Done updating the Inode Allocation Map.
LOGREDO:  Beginning to update the Block Map.
LOGREDO:  Done updating the Block Map.
LOGREDO:  End of log found at logend = 0x0164afe8
LOGREDO:  Synch point record number:  0x01637898
LOGREDO:  Synch point record address:  0x01622fc4
LOGREDO:  Number of log records:    (d) 1602
LOGREDO:  Number of Do blocks:    (d) 202
LOGREDO:  Number of NoDo blocks:    (d) 0
logredo returned rc = 0
 **Phase 1 - Check Blocks, Files/Directories, and  Directory Entries
 **Phase 2 - Count links
 **Phase 3 - Duplicate Block Rescan and Directory Connectedness
 **Phase 4 - Report Problems
 **Phase 5 - Check Connectivity
 **Phase 6 - Perform Approved Corrections
 **Phase 7 - Rebuild File/Directory Allocation Maps
 **Phase 8 - Rebuild Disk Allocation Maps
Filesystem Summary:
Blocks in use for inodes:  12020
Inode count:  96160
File count:  87633
Directory count:  1015
Block count:  244190000
Free block count:  458736
976760000 kilobytes total disk space.
    10091 kilobytes in 1015 directories.
974728464 kilobytes in 87633 user files.
        0 kilobytes in extended attributes
        0 kilobytes in access control lists
   206683 kilobytes reserved for system use.
  1834944 kilobytes are available for use.
Filesystem is clean.
All observed inconsistencies have been repaired.
Filesystem has been marked clean.
 **** Filesystem was modified. **** 
processing terminated:  8/20/2009 19:35:15  with return code: 0  exit code: 0.

再度チェックすると問題無し。

# jfs_fsck -n /dev/sda1
jfs_fsck version 1.1.12, 24-Aug-2007
processing started: 8/20/2009 19.35.25
The current device is:  /dev/sda1
Block size in bytes:  4096
Filesystem size in blocks:  244190000
 **Phase 1 - Check Blocks, Files/Directories, and  Directory Entries
 **Phase 2 - Count links
 **Phase 3 - Duplicate Block Rescan and Directory Connectedness
 **Phase 4 - Report Problems
 **Phase 5 - Check Connectivity
 **Phase 6 - Perform Approved Corrections
 **Phase 7 - Verify File/Directory Allocation Maps
 **Phase 8 - Verify Disk Allocation Maps
976760000 kilobytes total disk space.
    10091 kilobytes in 1015 directories.
974728464 kilobytes in 87633 user files.
        0 kilobytes in extended attributes
   206683 kilobytes reserved for system use.
  1834944 kilobytes are available for use.
File system checked READ ONLY.
Filesystem is clean.

マウントが成功してデータも無事。
よかった。

というわけで、金欠だけど急いでAmazonでCPUクーラを購入。
実は今月に片方のCPUクーラのファン部分が壊れたのでそっちはCPUクーラを買ったんだけど、こちらはなかなか優秀。
ただ、欠点としてスリムな奴を買ったので取り付けが非常にやりにくかった。
で今回は大きめのを買ってみた。
多分土日あたりにくるのでそれまで家のエアコンはつけっぱなしにしないと。

既に買ったクーラ