| | 1 | [[PageOutline]] |
| | 2 | |
| | 3 | = failure test = |
| | 4 | |
| | 5 | == 初期状態 == |
| | 6 | * cat /proc/mdstat |
| | 7 | {{{ |
| | 8 | Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] |
| | 9 | md1 : active raid1 sda2[0] sdc1[2](S) sdb2[1] |
| | 10 | 1461760 blocks [2/2] [UU] |
| | 11 | |
| | 12 | md0 : active raid0 sda1[0] sdb1[1] |
| | 13 | 192512 blocks 64k chunks |
| | 14 | |
| | 15 | unused devices: <none> |
| | 16 | }}} |
| | 17 | * sudo mdadm -D /dev/md1 |
| | 18 | {{{ |
| | 19 | /dev/md1: |
| | 20 | Version : 00.90.03 |
| | 21 | Creation Time : Thu Jun 11 22:27:07 2009 |
| | 22 | Raid Level : raid1 |
| | 23 | Array Size : 1461760 (1427.74 MiB 1496.84 MB) |
| | 24 | Used Dev Size : 1461760 (1427.74 MiB 1496.84 MB) |
| | 25 | Raid Devices : 2 |
| | 26 | Total Devices : 3 |
| | 27 | Preferred Minor : 1 |
| | 28 | Persistence : Superblock is persistent |
| | 29 | |
| | 30 | Update Time : Fri Jun 12 02:21:57 2009 |
| | 31 | State : clean |
| | 32 | Active Devices : 2 |
| | 33 | Working Devices : 3 |
| | 34 | Failed Devices : 0 |
| | 35 | Spare Devices : 1 |
| | 36 | |
| | 37 | UUID : 79c3f25a:e47a02f3:9bb41f43:b191cd1a |
| | 38 | Events : 0.5 |
| | 39 | |
| | 40 | Number Major Minor RaidDevice State |
| | 41 | 0 8 2 0 active sync /dev/sda2 |
| | 42 | 1 8 18 1 active sync /dev/sdb2 |
| | 43 | |
| | 44 | 2 8 33 - spare /dev/sdc1 |
| | 45 | }}} |
| | 46 | |
| | 47 | == hot-remove spare disk == |
| | 48 | * sudo mdadm /dev/md1 -r /dev/sdc1 |
| | 49 | {{{ |
| | 50 | mdadm: hot removed /dev/sdc1 |
| | 51 | }}} |
| | 52 | * sudo mdadm -D /dev/md1 |
| | 53 | {{{ |
| | 54 | Number Major Minor RaidDevice State |
| | 55 | 0 8 2 0 active sync /dev/sda2 |
| | 56 | 1 8 18 1 active sync /dev/sdb2 |
| | 57 | }}} |
| | 58 | * sudo mdadm /dev/md1 -a /dev/sdc1 |
| | 59 | {{{ |
| | 60 | mdadm: re-added /dev/sdc1 |
| | 61 | }}} |
| | 62 | * sudo mdadm -D /dev/md1 |
| | 63 | {{{ |
| | 64 | Number Major Minor RaidDevice State |
| | 65 | 0 8 2 0 active sync /dev/sda2 |
| | 66 | 1 8 18 1 active sync /dev/sdb2 |
| | 67 | |
| | 68 | 2 8 33 - spare /dev/sdc1 |
| | 69 | }}} |
| | 70 | |
| | 71 | == fail, remove and re-add == |
| | 72 | * man mdadm |
| | 73 | {{{ |
| | 74 | MANAGE MODE |
| | 75 | Usage: mdadm device options... devices... |
| | 76 | |
| | 77 | This usage will allow individual devices in an array to be failed, |
| | 78 | removed or added. It is possible to perform multiple operations with |
| | 79 | on command. For example: |
| | 80 | mdadm /dev/md0 -f /dev/hda1 -r /dev/hda1 -a /dev/hda1 |
| | 81 | will firstly mark /dev/hda1 as faulty in /dev/md0 and will then remove |
| | 82 | it from the array and finally add it back in as a spare. However only |
| | 83 | one md array can be affected by a single command. |
| | 84 | }}} |
| | 85 | |
| | 86 | * sudo mdadm /dev/md1 -f /dev/sda2 -r /dev/sda2 -a /dev/sda2 |
| | 87 | {{{ |
| | 88 | mdadm: set /dev/sda2 faulty in /dev/md1 |
| | 89 | mdadm: hot removed /dev/sda2 |
| | 90 | mdadm: re-added /dev/sda2 |
| | 91 | }}} |
| | 92 | * cat /proc/mdstat |
| | 93 | {{{ |
| | 94 | Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] |
| | 95 | md1 : active raid1 sda2[2](S) sdc1[3] sdb2[1] |
| | 96 | 1461760 blocks [2/1] [_U] |
| | 97 | [>....................] recovery = 0.5% (8448/1461760) finish=2.8min speed=8448K/sec |
| | 98 | |
| | 99 | md0 : active raid0 sda1[0] sdb1[1] |
| | 100 | 192512 blocks 64k chunks |
| | 101 | |
| | 102 | unused devices: <none> |
| | 103 | }}} |
| | 104 | * sudo mdadm -D /dev/md1 |
| | 105 | {{{ |
| | 106 | /dev/md1: |
| | 107 | Version : 00.90.03 |
| | 108 | Creation Time : Thu Jun 11 22:27:07 2009 |
| | 109 | Raid Level : raid1 |
| | 110 | Array Size : 1461760 (1427.74 MiB 1496.84 MB) |
| | 111 | Used Dev Size : 1461760 (1427.74 MiB 1496.84 MB) |
| | 112 | Raid Devices : 2 |
| | 113 | Total Devices : 3 |
| | 114 | Preferred Minor : 1 |
| | 115 | Persistence : Superblock is persistent |
| | 116 | |
| | 117 | Update Time : Fri Jun 12 02:28:20 2009 |
| | 118 | State : clean, degraded, recovering |
| | 119 | Active Devices : 1 |
| | 120 | Working Devices : 3 |
| | 121 | Failed Devices : 0 |
| | 122 | Spare Devices : 2 |
| | 123 | |
| | 124 | Rebuild Status : 8% complete |
| | 125 | |
| | 126 | UUID : 79c3f25a:e47a02f3:9bb41f43:b191cd1a |
| | 127 | Events : 0.17 |
| | 128 | |
| | 129 | Number Major Minor RaidDevice State |
| | 130 | 3 8 33 0 spare rebuilding /dev/sdc1 |
| | 131 | 1 8 18 1 active sync /dev/sdb2 |
| | 132 | |
| | 133 | 2 8 2 - spare /dev/sda2 |
| | 134 | }}} |
| | 135 | |
| | 136 | === recovering === |
| | 137 | * dmesg |
| | 138 | {{{ |
| | 139 | [ 6932.978126] raid1: Disk failure on sda2, disabling device. |
| | 140 | [ 6932.978134] Operation continuing on 1 devices |
| | 141 | [ 6932.994568] RAID1 conf printout: |
| | 142 | [ 6932.994603] --- wd:1 rd:2 |
| | 143 | [ 6932.995107] disk 0, wo:1, o:0, dev:sda2 |
| | 144 | [ 6932.995127] disk 1, wo:0, o:1, dev:sdb2 |
| | 145 | [ 6933.022454] RAID1 conf printout: |
| | 146 | [ 6933.022462] --- wd:1 rd:2 |
| | 147 | [ 6933.022476] disk 1, wo:0, o:1, dev:sdb2 |
| | 148 | [ 6933.056753] RAID1 conf printout: |
| | 149 | [ 6933.056758] --- wd:1 rd:2 |
| | 150 | [ 6933.056762] disk 0, wo:1, o:1, dev:sdc1 |
| | 151 | [ 6933.056764] disk 1, wo:0, o:1, dev:sdb2 |
| | 152 | [ 6933.061349] md: recovery of RAID array md1 |
| | 153 | [ 6933.061379] md: minimum _guaranteed_ speed: 1000 KB/sec/disk. |
| | 154 | [ 6933.061403] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for recovery. |
| | 155 | [ 6933.062332] md: using 128k window, over a total of 1461760 blocks. |
| | 156 | [ 6933.173690] md: unbind<sda2> |
| | 157 | [ 6933.173708] md: export_rdev(sda2) |
| | 158 | [ 6933.945635] md: bind<sda2> |
| | 159 | [ 7066.932827] md: md1: recovery done. |
| | 160 | [ 7067.055469] RAID1 conf printout: |
| | 161 | [ 7067.055475] --- wd:2 rd:2 |
| | 162 | [ 7067.055479] disk 0, wo:0, o:1, dev:sdc1 |
| | 163 | [ 7067.055481] disk 1, wo:0, o:1, dev:sdb2 |
| | 164 | }}} |
| | 165 | * cat /proc/mdstat |
| | 166 | {{{ |
| | 167 | Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] |
| | 168 | md1 : active raid1 sda2[2](S) sdc1[0] sdb2[1] |
| | 169 | 1461760 blocks [2/2] [UU] |
| | 170 | |
| | 171 | md0 : active raid0 sda1[0] sdb1[1] |
| | 172 | 192512 blocks 64k chunks |
| | 173 | |
| | 174 | unused devices: <none> |
| | 175 | }}} |
| | 176 | * sudo mdadm -D /dev/md1 |
| | 177 | {{{ |
| | 178 | /dev/md1: |
| | 179 | Version : 00.90.03 |
| | 180 | Creation Time : Thu Jun 11 22:27:07 2009 |
| | 181 | Raid Level : raid1 |
| | 182 | Array Size : 1461760 (1427.74 MiB 1496.84 MB) |
| | 183 | Used Dev Size : 1461760 (1427.74 MiB 1496.84 MB) |
| | 184 | Raid Devices : 2 |
| | 185 | Total Devices : 3 |
| | 186 | Preferred Minor : 1 |
| | 187 | Persistence : Superblock is persistent |
| | 188 | |
| | 189 | Update Time : Fri Jun 12 02:31:09 2009 |
| | 190 | State : active |
| | 191 | Active Devices : 2 |
| | 192 | Working Devices : 3 |
| | 193 | Failed Devices : 0 |
| | 194 | Spare Devices : 1 |
| | 195 | |
| | 196 | UUID : 79c3f25a:e47a02f3:9bb41f43:b191cd1a |
| | 197 | Events : 0.45 |
| | 198 | |
| | 199 | Number Major Minor RaidDevice State |
| | 200 | 0 8 33 0 active sync /dev/sdc1 |
| | 201 | 1 8 18 1 active sync /dev/sdb2 |
| | 202 | |
| | 203 | 2 8 2 - spare /dev/sda2 |
| | 204 | }}} |
| | 205 | |
| | 206 | == reboot with degraded 1 disk == |
| | 207 | * sudo mdadm /dev/md1 -f /dev/sdc1 /dev/sda2 |
| | 208 | {{{ |
| | 209 | mdadm: set /dev/sdc1 faulty in /dev/md1 |
| | 210 | mdadm: set /dev/sda2 faulty in /dev/md1 |
| | 211 | }}} |
| | 212 | * sudo mdadm /dev/md1 -r /dev/sdc1 /dev/sda2 |
| | 213 | {{{ |
| | 214 | mdadm: hot removed /dev/sdc1 |
| | 215 | mdadm: hot removed /dev/sda2 |
| | 216 | }}} |
| | 217 | * sudo mdadm -D /dev/md1 |
| | 218 | {{{ |
| | 219 | Number Major Minor RaidDevice State |
| | 220 | 0 0 0 0 removed |
| | 221 | 1 8 18 1 active sync /dev/sdb2 |
| | 222 | }}} |
| | 223 | * sudo reboot |
| | 224 | * /dev/sdb2 のみで正常に起動する |
