Linux
如何從 RAID1 中的工作驅動程序掛載分區
陣列中的一個硬碟驅動器已死，我不確定它是 raid0 還是 raid1，我想要實現的是安裝工作驅動器並備份剩餘的驅動器。
如果我掛載
/dev/md127，那麼我只能看到一些 grub 文件，總大小約為 100mb。如果我嘗試
mount /dev/md1我得到：root@rescue:~# mount /dev/md1 /mnt mount: /dev/md1: can't read superblock一些輸出：
root@rescue:~# fdisk -l Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes 255 heads, 63 sectors/track, 182401 cylinders, total 2930277168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0001f015 Device Boot Start End Blocks Id System /dev/sdb1 * 63 208844 104391 fd Linux raid autodetect /dev/sdb2 208845 16787924 8289540 fd Linux raid autodetect /dev/sdb3 16787925 2930272064 1456742070 fd Linux raid autodetect Disk /dev/md127: 106 MB, 106823680 bytes 2 heads, 4 sectors/track, 26080 cylinders, total 208640 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/md127 doesn't contain a valid partition table root@rescue:~# cat /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty] md127 : active raid1 sdb1[1] 104320 blocks [2/1] [_U] unused devices: <none> root@rescue:~# mdadm --examine /dev/sdb2 /dev/sdb2: Magic : a92b4efc Version : 0.90.00 UUID : fca66a1e:c6aba1f7:ace437e0:ae545265 Creation Time : Thu Oct 21 01:57:07 2010 Raid Level : raid0 Raid Devices : 2 Total Devices : 2 Preferred Minor : 1 Update Time : Thu Oct 21 01:57:07 2010 State : active Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Checksum : 6138e9b8 - correct Events : 1 Chunk Size : 256K Number Major Minor RaidDevice State this 1 8 18 1 active sync /dev/sdb2 0 0 8 2 0 active sync 1 1 8 18 1 active sync /dev/sdb2如果有人可以分享，如何正確安裝驅動程序以便能夠訪問數據（最好是只讀模式，所以如果可能的話，我不會搞砸任何事情）……
root@rescue:~# mdadm --examine --scan ARRAY /dev/md127 UUID=0464b5c4:d777ef5e:17b64c46:2e5e61c3 ARRAY /dev/md1 UUID=fca66a1e:c6aba1f7:ace437e0:ae545265 ARRAY /dev/md2 UUID=46c22b6d:dc9668a4:13d0e329:c7b8b0ca和
root@rescue:~# mdadm --detail /dev/md126 mdadm: cannot open /dev/md126: No such file or directory和
root@rescue:~/dd_rescue# mdadm --detail /dev/md1 mdadm: md device /dev/md1 does not appear to be active. root@rescue:~/dd_rescue# root@rescue:~/dd_rescue# root@rescue:~/dd_rescue# root@rescue:~/dd_rescue# mdadm --detail /dev/md2 mdadm: md device /dev/md2 does not appear to be active.聰明的
root@rescue:~# smartctl -a /dev/sda smartctl 5.41 2011-06-09 r3365 [i686-linux-3.2.2-xxxx-std-ipv6-32] (local build) Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Device Model: ST_M13FQBL Serial Number: QNR_BFW Firmware Version: 1117F38F User Capacity: 4,142,054,400 bytes [4.14 GB] Sector Size: 512 bytes logical/physical Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 6 ATA Standard is: ATA/ATAPI-6 T13 1410D revision 2 Local Time is: Thu May 16 01:37:37 2013 CEST SMART support is: Available - device has SMART capability. SMART support is: Enabled Error SMART Values Read failed: scsi error aborted command Smartctl: SMART Read Values failed. === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: UNKNOWN! SMART Status, Attributes and Thresholds cannot be read. Error SMART Error Log Read failed: scsi error aborted command Smartctl: SMART Error Log Read Failed Error SMART Error Self-Test Log Read failed: scsi error aborted command Smartctl: SMART Self Test Log Read Failed Device does not support Selective Self Tests/Logging
如果其中一個驅動器死了，您將無法再掛載 /dev/md1 - 您必須在仍然活動的驅動器上掛載一個分區：/dev/sdb2 或 /dev/sdb3
您可以使用獲取更多資訊
mdadm --examine /dev/sdb2如果 sdb2 和 sdb3 執行 RAID0，則這些分區上的所有數據都將失去。
掛載分區時必須指定文件系統類型，例如
mount -o ro -t ext3 /dev/sdb2 /mnt如果你知道它的 ext3。ro - 用於只讀安裝。