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mdadm chaos

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Mar 9th, 2014
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  1. root@petra:~# cat /proc/mdstat
  2. Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
  3. md1 : active raid1 sdd[3]
  4.       2930135360 blocks super 1.2 [2/1] [U_]
  5.      
  6. md0 : active linear sda[1] sdb[0]
  7.       2930277152 blocks super 1.2 0k rounding
  8.      
  9. unused devices: <none>
  10.  
  11. root@petra:~# mdadm -E /dev/md0
  12. /dev/md0:
  13.           Magic : a92b4efc
  14.         Version : 1.2
  15.     Feature Map : 0x0
  16.      Array UUID : 03c85017:15cecfb6:13d059bc:a8ff8779
  17.            Name : petra:md1  (local to host petra)
  18.   Creation Time : Sun Feb 16 12:21:56 2014
  19.      Raid Level : raid1
  20.    Raid Devices : 2
  21.  
  22.  Avail Dev Size : 5860292160 (2794.41 GiB 3000.47 GB)
  23.      Array Size : 2930135360 (2794.39 GiB 3000.46 GB)
  24.   Used Dev Size : 5860270720 (2794.39 GiB 3000.46 GB)
  25.     Data Offset : 262144 sectors
  26.    Super Offset : 8 sectors
  27.           State : clean
  28.     Device UUID : ae9da3ed:c4d422cb:06cf927d:b75bfc36
  29.  
  30.     Update Time : Sat Mar  8 18:14:00 2014
  31.        Checksum : 51e09d97 - correct
  32.          Events : 74578
  33.  
  34.  
  35.    Device Role : Active device 1
  36.    Array State : AA ('A' == active, '.' == missing)
  37.  
  38. root@petra:~# mdadm -E /dev/md1
  39. mdadm: No md superblock detected on /dev/md1.
  40.  
  41. root@petra:~# mdadm -E /dev/sda
  42. /dev/sda:
  43.           Magic : a92b4efc
  44.         Version : 1.2
  45.     Feature Map : 0x0
  46.      Array UUID : 952ad074:4039f24a:2ec1808e:d555a88c
  47.            Name : petra:0  (local to host petra)
  48.   Creation Time : Sat Feb 22 10:41:46 2014
  49.      Raid Level : linear
  50.    Raid Devices : 2
  51.  
  52.  Avail Dev Size : 2930277152 (1397.27 GiB 1500.30 GB)
  53.   Used Dev Size : 0
  54.     Data Offset : 16 sectors
  55.    Super Offset : 8 sectors
  56.           State : clean
  57.     Device UUID : 06cbac66:fdfd5c9c:ca28e6bd:bf0ce319
  58.  
  59.     Update Time : Sat Feb 22 10:41:46 2014
  60.        Checksum : 2648c5a7 - correct
  61.          Events : 0
  62.  
  63.        Rounding : 0K
  64.  
  65.    Device Role : Active device 1
  66.    Array State : AA ('A' == active, '.' == missing)
  67.  
  68. root@petra:~# mdadm -E /dev/sdb
  69. /dev/sdb:
  70.           Magic : a92b4efc
  71.         Version : 1.2
  72.     Feature Map : 0x0
  73.      Array UUID : 952ad074:4039f24a:2ec1808e:d555a88c
  74.            Name : petra:0  (local to host petra)
  75.   Creation Time : Sat Feb 22 10:41:46 2014
  76.      Raid Level : linear
  77.    Raid Devices : 2
  78.  
  79.  Avail Dev Size : 2930277152 (1397.27 GiB 1500.30 GB)
  80.   Used Dev Size : 0
  81.     Data Offset : 16 sectors
  82.    Super Offset : 8 sectors
  83.           State : clean
  84.     Device UUID : f73ccc16:8287c269:cc550726:1ac5c62c
  85.  
  86.     Update Time : Sat Feb 22 10:41:46 2014
  87.        Checksum : 1ed2a678 - correct
  88.          Events : 0
  89.  
  90.        Rounding : 0K
  91.  
  92.    Device Role : Active device 0
  93.    Array State : AA ('A' == active, '.' == missing)
  94.  
  95. root@petra:~# mdadm -E /dev/sdd
  96. /dev/sdd:
  97.           Magic : a92b4efc
  98.         Version : 1.2
  99.     Feature Map : 0x0
  100.      Array UUID : 03c85017:15cecfb6:13d059bc:a8ff8779
  101.            Name : petra:md1  (local to host petra)
  102.   Creation Time : Sun Feb 16 12:21:56 2014
  103.      Raid Level : raid1
  104.    Raid Devices : 2
  105.  
  106.  Avail Dev Size : 5860271024 (2794.40 GiB 3000.46 GB)
  107.      Array Size : 2930135360 (2794.39 GiB 3000.46 GB)
  108.   Used Dev Size : 5860270720 (2794.39 GiB 3000.46 GB)
  109.     Data Offset : 262144 sectors
  110.    Super Offset : 8 sectors
  111.           State : clean
  112.     Device UUID : 51b0511c:71b76da6:656c74a4:b017364c
  113.  
  114.     Update Time : Sun Mar  9 11:21:33 2014
  115.        Checksum : 97f68a83 - correct
  116.          Events : 74580
  117.  
  118.  
  119.    Device Role : Active device 0
  120.    Array State : A. ('A' == active, '.' == missing)
  121.  
  122. root@petra:~# mdadm -E /dev/sda1
  123. /dev/sda1:
  124.           Magic : a92b4efc
  125.         Version : 0.90.00
  126.            UUID : e151ea2f:37b942a4:e368bf24:bd0fce41
  127.   Creation Time : Sat Dec 19 12:23:07 2009
  128.      Raid Level : raid1
  129.   Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
  130.      Array Size : 1465135936 (1397.26 GiB 1500.30 GB)
  131.    Raid Devices : 2
  132.   Total Devices : 2
  133. Preferred Minor : 0
  134.  
  135.     Update Time : Sat Feb 22 10:39:34 2014
  136.           State : clean
  137.  Active Devices : 2
  138. Working Devices : 2
  139.  Failed Devices : 0
  140.   Spare Devices : 0
  141.        Checksum : 583868a2 - correct
  142.          Events : 451
  143.  
  144.  
  145.       Number   Major   Minor   RaidDevice State
  146. this     0       8       17        0      active sync   /dev/sdb1
  147.  
  148.    0     0       8       17        0      active sync   /dev/sdb1
  149.    1     1       8        1        1      active sync   /dev/sda1
  150.  
  151. root@petra:~# mdadm -E /dev/sdb1
  152. mdadm: No md superblock detected on /dev/sdb1.
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