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Aug 27th, 2013
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  1. rune@rune-desktop:~$ cat /proc/mdstat
  2. Personalities : [raid0] [linear] [multipath] [raid1] [raid6] [raid5] [raid4] [raid10]
  3. md0 : active raid0 sdd1[1] sdc1[0]
  4.       1953522688 blocks super 1.2 512k chunks
  5.      
  6. md2 : active (auto-read-only) raid1 sdb1[0]
  7.       1953382488 blocks super 1.2 [2/1] [U_]
  8.      
  9. unused devices: <none>
  10.  
  11. rune@rune-desktop:~$ sudo mdadm --detail /dev/md0
  12. /dev/md0:
  13.         Version : 1.2
  14.   Creation Time : Sun Aug 25 21:14:24 2013
  15.      Raid Level : raid0
  16.      Array Size : 1953522688 (1863.02 GiB 2000.41 GB)
  17.    Raid Devices : 2
  18.   Total Devices : 2
  19.     Persistence : Superblock is persistent
  20.  
  21.     Update Time : Sun Aug 25 21:14:24 2013
  22.           State : clean
  23.  Active Devices : 2
  24. Working Devices : 2
  25.  Failed Devices : 0
  26.   Spare Devices : 0
  27.  
  28.      Chunk Size : 512K
  29.  
  30.            Name : rune-desktop:0  (local to host rune-desktop)
  31.            UUID : 4d8bea96:08136ba8:75029197:fe2e2a4b
  32.          Events : 0
  33.  
  34.     Number   Major   Minor   RaidDevice State
  35.        0       8       33        0      active sync   /dev/sdc1
  36.        1       8       49        1      active sync   /dev/sdd1
  37.  
  38. rune@rune-desktop:~$ sudo mdadm --detail /dev/md2
  39. /dev/md2:
  40.         Version : 1.2
  41.   Creation Time : Sun Aug 25 11:13:35 2013
  42.      Raid Level : raid1
  43.      Array Size : 1953382488 (1862.89 GiB 2000.26 GB)
  44.   Used Dev Size : 1953382488 (1862.89 GiB 2000.26 GB)
  45.    Raid Devices : 2
  46.   Total Devices : 1
  47.     Persistence : Superblock is persistent
  48.  
  49.     Update Time : Tue Aug 27 13:53:26 2013
  50.           State : clean, degraded
  51.  Active Devices : 1
  52. Working Devices : 1
  53.  Failed Devices : 0
  54.   Spare Devices : 0
  55.  
  56.            Name : rune-desktop:2  (local to host rune-desktop)
  57.            UUID : 494e7219:c094f19f:97e26ffa:e09020d3
  58.          Events : 21572
  59.  
  60.     Number   Major   Minor   RaidDevice State
  61.        0       8       17        0      active sync   /dev/sdb1
  62.        1       0        0        1      removed
  63.  
  64. rune@rune-desktop:~$ cat /etc/mdadm/mdadm.conf |egrep -v "^#|^$"
  65. CREATE owner=root group=disk mode=0660 auto=yes
  66. HOMEHOST <system>
  67. ARRAY /dev/md/stripe UUID=4d8bea96:08136ba8:75029197:fe2e2a4b
  68. ARRAY /dev/md/mirror UUID=494e7219:c094f19f:97e26ffa:e09020d3
  69.  
  70. rune@rune-desktop:~$ ls -lR /dev/md*
  71. brw-rw---- 1 root disk 9, 0 Aug 27 13:53 /dev/md0
  72. brw-rw---- 1 root disk 9, 2 Aug 27 13:53 /dev/md2
  73.  
  74. /dev/md:
  75. total 0
  76. lrwxrwxrwx 1 root root 6 Aug 27 13:53 mirror -> ../md2
  77. lrwxrwxrwx 1 root root 6 Aug 27 13:53 stripe -> ../md0
  78.  
  79. rune@rune-desktop:~$ cat /var/log/syslog|grep md
  80. Aug 27 13:53:55 rune-desktop kernel: [    1.951554] md: bind<sdb1>
  81. Aug 27 13:53:55 rune-desktop kernel: [    1.963945] md: bind<sdc1>
  82. Aug 27 13:53:55 rune-desktop kernel: [    2.037996] md: bind<sdd1>
  83. Aug 27 13:53:55 rune-desktop kernel: [    2.039478] md: raid0 personality registered for level 0
  84. Aug 27 13:53:55 rune-desktop kernel: [    2.039587] md/raid0:md0: md_size is 3907045376 sectors.
  85. Aug 27 13:53:55 rune-desktop kernel: [    2.039594] md: RAID0 configuration for md0 - 1 zone
  86. Aug 27 13:53:55 rune-desktop kernel: [    2.039595] md: zone0=[sdc1/sdd1]
  87. Aug 27 13:53:55 rune-desktop kernel: [    2.039604] md0: detected capacity change from 0 to 2000407232512
  88. Aug 27 13:53:55 rune-desktop kernel: [    2.040887]  md0: unknown partition table
  89. Aug 27 13:53:55 rune-desktop kernel: [    2.431498] md: linear personality registered for level -1
  90. Aug 27 13:53:55 rune-desktop kernel: [    2.433330] md: multipath personality registered for level -4
  91. Aug 27 13:53:55 rune-desktop kernel: [    2.435846] md: raid1 personality registered for level 1
  92. Aug 27 13:53:55 rune-desktop kernel: [    2.680802] md: raid6 personality registered for level 6
  93. Aug 27 13:53:55 rune-desktop kernel: [    2.680804] md: raid5 personality registered for level 5
  94. Aug 27 13:53:55 rune-desktop kernel: [    2.680805] md: raid4 personality registered for level 4
  95. Aug 27 13:53:55 rune-desktop kernel: [    2.684732] md: raid10 personality registered for level 10
  96. Aug 27 13:53:55 rune-desktop kernel: [    4.733765] md/raid1:md2: active with 1 out of 2 mirrors
  97. Aug 27 13:53:55 rune-desktop kernel: [    4.733792] md2: detected capacity change from 0 to 2000263667712
  98. Aug 27 13:53:55 rune-desktop kernel: [    4.760451]  md2: unknown partition table
  99. Aug 27 13:53:56 rune-desktop mdadm[1646]: DegradedArray event detected on md device /dev/md/mirror
  100. Aug 27 13:53:56 rune-desktop mdadm[1646]: DeviceDisappeared event detected on md device /dev/md/stripe, component device Wrong-Level
  101. Aug 27 13:53:57 rune-desktop dbus[707]: [system] Activating service name='org.freedesktop.systemd1' (using servicehelper)
  102. Aug 27 13:53:57 rune-desktop dbus[707]: [system] Successfully activated service 'org.freedesktop.systemd1'
  103. Aug 27 13:54:02 rune-desktop udisksd[2697]: Error creating watch for file /sys/devices/virtual/block/md0/md/sync_action: No such file or directory (g-file-error-quark, 4)
  104. Aug 27 13:54:02 rune-desktop udisksd[2697]: Error creating watch for file /sys/devices/virtual/block/md0/md/degraded: No such file or directory (g-file-error-quark, 4)
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