Changes between Version 3 and Version 4 of TipAndDoc/storage/filesystem

Timestamp:

May 13, 2010 1:34:05 PM (15 years ago)

Author:

mitty

Comment:

--

TipAndDoc/storage/filesystem

@@ -398 +398 @@
 
  * 全くmount出来なくなる
+
+ ==== 適当(と思われる)方法 ====
+ 1. mount
+   * sudo fdisk -l /dev/sdb
+{{{
+/dev/sdb1               1         132     1060258+  83  Linux
+/dev/sdb2             133         522     3132675   83  Linux
+}}}
+   * sudo fdisk -lu /dev/sdb
+{{{
+/dev/sdb1              63     2120579     1060258+  83  Linux
+/dev/sdb2         2120580     8385929     3132675   83  Linux
+}}}
+   * sudo mount /dev/sdb1 /mnt/sdb1
+   * sudo mount /dev/sdb2 /mnt/sdb2
+   * df -h
+{{{
+/dev/sdb1             1.1G   15M 1012M   2% /mnt/sdb1
+/dev/sdb2             3.0G   15M  3.0G   1% /mnt/sdb2
+}}}
+   * sha1sum -b /mnt/sdb*/rand*.10M
+{{{
+11b2836d9c88f3890224f5d4250e2dd86ddca3e6 */mnt/sdb1/rand1.10M
+3b2fb16c6416b5c6314c396f03275fd20ff8f24b */mnt/sdb2/rand2.10M
+}}}
+ 1. テストデータの用意
+   * sudo dd if=/dev/urandom of=/mnt/sdb1/rand1.900M bs=512 count=921600
+   * sudo dd if=/dev/urandom of=/mnt/sdb2/rand2.2900M bs=1024 count=2969600
+   * sudo dd if=/dev/urandom of=/mnt/sdb1/rand1.max bs=512
+   * sudo dd if=/dev/urandom of=/mnt/sdb2/rand2.max bs=512 &
+   * df -h
+{{{
+/dev/sdb1             1.1G  1.1G   20K 100% /mnt/sdb1
+/dev/sdb2             3.0G  3.0G   20K 100% /mnt/sdb2
+}}}
+   * sha1sum -b /mnt/sdb*/rand* > checksum.sha1
+ 1. remake partition
+   * sudo umount /dev/sdb![123]
+   * sudo fdisk /dev/sdb
+{{{
+Command (m for help): d
+Partition number (1-4): 1
+
+Command (m for help): d
+Selected partition 2
+
+Command (m for help): n
+Command action
+   e   extended
+   p   primary partition (1-4)
+p
+Partition number (1-4): 1
+First cylinder (1-522, default 1):
+Using default value 1
+Last cylinder, +cylinders or +size{K,M,G} (1-522, default 522):
+Using default value 522
+
+/dev/sdb1               1         522     4192933+  83  Linux
+}}}
+   * sudo mount /dev/sdb1 /mnt/sdb1
+   * sha1sum -c checksum.sha1
+{{{
+/mnt/sdb1/rand1.10M: OK
+/mnt/sdb1/rand1.900M: OK
+/mnt/sdb1/rand1.max: OK
+sha1sum: /mnt/sdb2/rand2.10M: No such file or directory
+/mnt/sdb2/rand2.10M: FAILED open or read
+sha1sum: /mnt/sdb2/rand2.2900M: No such file or directory
+/mnt/sdb2/rand2.2900M: FAILED open or read
+sha1sum: /mnt/sdb2/rand2.max: No such file or directory
+/mnt/sdb2/rand2.max: FAILED open or read
+sha1sum: WARNING: 3 of 6 listed files could not be read
+}}}
+     * 旧sdb1の内容がmountされる
+ 1. copy sdb2 to sdb1 with dd
+   * sudo umount /dev/sdb![123]
+   * sudo dd if=/dev/sdb of=/dev/sdb bs=512 count=6265350 seek=63 skip=2120580 &
+     * seek=BLOCKS
+       * skip BLOCKS obs-sized blocks at start of output
+     * skip=BLOCKS
+       * skip BLOCKS ibs-sized blocks at start of input
+     * 6265350 = 8385929 - 2120580 + 1
+ 1. re-mount
+   * sudo mount /dev/sdb1 /mnt/sdb2
+   * df -h
+{{{
+/dev/sdb1             3.0G  3.0G   20K 100% /mnt/sdb2
+}}}
+ 1. verify data
+   * sha1sum -c checksum.sha1
+{{{
+sha1sum: /mnt/sdb1/rand1.10M: No such file or directory
+/mnt/sdb1/rand1.10M: FAILED open or read
+sha1sum: /mnt/sdb1/rand1.900M: No such file or directory
+/mnt/sdb1/rand1.900M: FAILED open or read
+sha1sum: /mnt/sdb1/rand1.max: No such file or directory
+/mnt/sdb1/rand1.max: FAILED open or read
+/mnt/sdb2/rand2.10M: OK
+/mnt/sdb2/rand2.2900M: OK
+/mnt/sdb2/rand2.max: OK
+sha1sum: WARNING: 3 of 6 listed files could not be read
+}}}
+   * 問題なく旧sdb2の内容になっている
+ 1. resize xfs filesystem
+   * sudo xfs_growfs /mnt/sdb2
+{{{
+meta-data=/dev/sdb1              isize=256    agcount=6, agsize=131532 blks
+         =                       sectsz=512   attr=2
+data     =                       bsize=4096   blocks=783168, imaxpct=25
+         =                       sunit=0      swidth=0 blks
+naming   =version 2              bsize=4096   ascii-ci=0
+log      =internal               bsize=4096   blocks=2560, version=2
+         =                       sectsz=512   sunit=0 blks, lazy-count=1
+realtime =none                   extsz=4096   blocks=0, rtextents=0
+data blocks changed from 783168 to 1048233
+}}}
+   * df -h
+{{{
+/dev/sdb1             4.0G  3.0G  1.1G  75% /mnt/sdb2
+}}}