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| 1 | hoferr@media-server:~$ sudo mdadm --detail /dev/md0 | |
| 2 | /dev/md0: | |
| 3 | Version : 0.90 | |
| 4 | Creation Time : Wed Dec 22 02:13:21 2010 | |
| 5 | Raid Level : raid5 | |
| 6 | Array Size : 4395411264 (4191.79 GiB 4500.90 GB) | |
| 7 | Used Dev Size : 1465137088 (1397.26 GiB 1500.30 GB) | |
| 8 | Raid Devices : 4 | |
| 9 | Total Devices : 4 | |
| 10 | Preferred Minor : 0 | |
| 11 | Persistence : Superblock is persistent | |
| 12 | ||
| 13 | Update Time : Wed Apr 18 11:16:32 2012 | |
| 14 | State : clean | |
| 15 | Active Devices : 4 | |
| 16 | Working Devices : 4 | |
| 17 | Failed Devices : 0 | |
| 18 | Spare Devices : 0 | |
| 19 | ||
| 20 | Layout : left-symmetric | |
| 21 | Chunk Size : 64K | |
| 22 | ||
| 23 | UUID : 426c0b3a:41ce01ea:d14afcea:0399e8b7 | |
| 24 | Events : 0.48731 | |
| 25 | ||
| 26 | Number Major Minor RaidDevice State | |
| 27 | 0 8 49 0 active sync /dev/sdd1 | |
| 28 | 1 8 65 1 active sync /dev/sde1 | |
| 29 | 2 8 17 2 active sync /dev/sdb1 | |
| 30 | 3 8 33 3 active sync /dev/sdc1 | |
| 31 | ||
| 32 | hoferr@media-server:~$ sudo mdadm --zero-superblock /dev/sdd | |
| 33 | mdadm: Couldn't open /dev/sdd for write - not zeroing | |
| 34 | ||
| 35 | hoferr@media-server:~$ sudo mdadm --stop /dev/md0 | |
| 36 | mdadm: stopped /dev/md0 | |
| 37 | ||
| 38 | hoferr@media-server:~$ sudo mdadm --zero-superblock /dev/sdd | |
| 39 | mdadm: Unrecognised md component device - /dev/sdd | |
| 40 | ||
| 41 | hoferr@media-server:~$ sudo mdadm --zero-superblock /dev/sdd1 | |
| 42 | hoferr@media-server:~$ sudo mdadm --zero-superblock /dev/sde1 | |
| 43 | hoferr@media-server:~$ sudo mdadm --zero-superblock /dev/sdb1 | |
| 44 | hoferr@media-server:~$ sudo mdadm --zero-superblock /dev/sdc1 | |
| 45 | ||
| 46 | hoferr@media-server:~$ sudo mdadm --create --verbose /dev/md0 --auto=yes --assume-clean --level=5 --raid-devices=4 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 | |
| 47 | mdadm: layout defaults to left-symmetric | |
| 48 | mdadm: chunk size defaults to 512K | |
| 49 | mdadm: layout defaults to left-symmetric | |
| 50 | mdadm: layout defaults to left-symmetric | |
| 51 | mdadm: layout defaults to left-symmetric | |
| 52 | mdadm: layout defaults to left-symmetric | |
| 53 | mdadm: layout defaults to left-symmetric | |
| 54 | mdadm: size set to 1465135616K | |
| 55 | mdadm: Defaulting to version 1.2 metadata | |
| 56 | mdadm: array /dev/md0 started. | |
| 57 | ||
| 58 | hoferr@media-server:~$ sudo mdadm --assemble /dev/md0 --update=resync | |
| 59 | ||
| 60 | hoferr@media-server:~$ sudo mdadm --detail /dev/md0 | |
| 61 | /dev/md0: | |
| 62 | Version : 1.2 | |
| 63 | Creation Time : Wed Apr 18 16:07:12 2012 | |
| 64 | Raid Level : raid5 | |
| 65 | Array Size : 4395406848 (4191.79 GiB 4500.90 GB) | |
| 66 | Used Dev Size : 1465135616 (1397.26 GiB 1500.30 GB) | |
| 67 | Raid Devices : 4 | |
| 68 | Total Devices : 4 | |
| 69 | Persistence : Superblock is persistent | |
| 70 | ||
| 71 | Update Time : Wed Apr 18 16:07:12 2012 | |
| 72 | State : clean | |
| 73 | Active Devices : 4 | |
| 74 | Working Devices : 4 | |
| 75 | Failed Devices : 0 | |
| 76 | Spare Devices : 0 | |
| 77 | ||
| 78 | Layout : left-symmetric | |
| 79 | Chunk Size : 512K | |
| 80 | ||
| 81 | Name : media-server:0 (local to host media-server) | |
| 82 | UUID : a6c5c588:47d9ce20:7cc3ca49:0d0bc7db | |
| 83 | Events : 0 | |
| 84 | ||
| 85 | Number Major Minor RaidDevice State | |
| 86 | 0 8 17 0 active sync /dev/sdb1 | |
| 87 | 1 8 33 1 active sync /dev/sdc1 | |
| 88 | 2 8 49 2 active sync /dev/sdd1 | |
| 89 | 3 8 65 3 active sync /dev/sde1 | |
| 90 | ||
| 91 | hoferr@media-server:~$ sudo mount /dev/md0 test/ | |
| 92 | mount: you must specify the filesystem type | |
| 93 | ||
| 94 | hoferr@media-server:~$ sudo mount -tjfs /dev/md0 test/ | |
| 95 | mount: wrong fs type, bad option, bad superblock on /dev/md0, | |
| 96 | missing codepage or helper program, or other error | |
| 97 | In some cases useful info is found in syslog - try | |
| 98 | dmesg | tail or so | |
| 99 | ||
| 100 | hoferr@media-server:~$ dmesg | tail | |
| 101 | [ 1211.116702] mdadm: sending ioctl 1261 to a partition! | |
| 102 | [ 1211.116707] mdadm: sending ioctl 1261 to a partition! | |
| 103 | [ 1322.605543] mdadm: sending ioctl 1261 to a partition! | |
| 104 | [ 1322.605549] mdadm: sending ioctl 1261 to a partition! | |
| 105 | [ 1381.917490] mdadm: sending ioctl 800c0910 to a partition! | |
| 106 | [ 1381.917495] mdadm: sending ioctl 800c0910 to a partition! | |
| 107 | [ 1381.917662] mdadm: sending ioctl 800c0910 to a partition! | |
| 108 | [ 1381.917668] mdadm: sending ioctl 800c0910 to a partition! | |
| 109 | [ 1385.126808] mdadm: sending ioctl 1261 to a partition! | |
| 110 | - | [ 1385.126814] mdadm: sending ioctl 1261 to a partition! |
| 110 | + | [ 1385.126814] mdadm: sending ioctl 1261 to a partition! |
| 111 | ||
| 112 | hoferr@media-server:~$ sudo fdisk -l /dev/md0 | |
| 113 | ||
| 114 | Disk /dev/md0: 4500.9 GB, 4500896612352 bytes | |
| 115 | 2 heads, 4 sectors/track, 1098851712 cylinders | |
| 116 | Units = cylinders of 8 * 512 = 4096 bytes | |
| 117 | Sector size (logical/physical): 512 bytes / 512 bytes | |
| 118 | I/O size (minimum/optimal): 524288 bytes / 1572864 bytes | |
| 119 | Disk identifier: 0x00000000 | |
| 120 | ||
| 121 | Disk /dev/md0 doesn't contain a valid partition table |
