提前感谢任何帮助。
总结：我添加了3个新的磁盘raid 5arrays。 然后，认为他们没有添加，我删除了他们。 现在arrays不起作用。 我能做些什么来取回数组？
细节：
我使用“fd linux raid autodetect”格式化了3个新硬盘，并将它们添加到最初使用“ext4”设置的现有raid 5设置中。 当我发现可用的大小没有增加时，我意识到了我的不一致的mkfs，并且仓促并删除了3个新的驱动器（没有想到！），并对它们做了mkfs.ext4。 重新启动后，arrays不再会挂载。 在安装之前，md工作正常。 我正在踢自己….
由于我正在安装数组到/ home，所以我必须使用liveUSB。
我试图用三个驱动器强制组装和强制创build，因为数组的大小从来没有真正改变，所有的数据仍然应该在原来的三个磁盘上。 似乎没有任何工作。
将RAID设备的数量改为“3”是否足以让我的arrays恢复？ 如果是的话，我会怎么做呢？
任何帮助真的很感激。
这是我已经尝试过，可以看到：
sudo mdadm --grow /dev/md0 --raid-devices=3 mdadm: /dev/md0 is not an active md array - aborting ubuntu@ubuntu:~$ sudo mount /dev/md0 mount: can't find /dev/md0 in /etc/fstab or /etc/mtab ubuntu@ubuntu:~$ sudo mdadm -D /dev/md0 mdadm: md device /dev/md0 does not appear to be active. ubuntu@ubuntu:~$ sudo mdadm --examine --scan ARRAY /dev/md/0 metadata=1.2 UUID=eba025dd:a180e5f2:7b9be516:8710a212 name=ubuntu:0 ubuntu@ubuntu:~$ cat /proc/mdstat Personalities : md0 : inactive sda1[0](S) sdc1[3](S) sdb1[1](S) 5860537344 blocks super 1.2 unused devices: <none> ubuntu@ubuntu:~$ sudo mdadm -E /dev/sda1 /dev/sda1: Magic : a92b4efc Version : 1.2 Feature Map : 0x0 Array UUID : eba025dd:a180e5f2:7b9be516:8710a212 Name : ubuntu:0 (local to host ubuntu) Creation Time : Tue Dec 24 21:25:20 2013 Raid Level : raid5 Raid Devices : 6 Avail Dev Size : 3907024896 (1863.01 GiB 2000.40 GB) Array Size : 19535119360 (9315.07 GiB 10001.98 GB) Used Dev Size : 3907023872 (1863.01 GiB 2000.40 GB) Data Offset : 2048 sectors Super Offset : 8 sectors State : clean Device UUID : 44b40ccc:faf41272:21a6a41a:6f2c4798 Update Time : Wed Dec 10 22:50:15 2014 Checksum : 36b18224 - correct Events : 7953 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 0 Array State : AAA... ('A' == active, '.' == missing) 其他两个驱动器列表基本上类似的信息。
所以我尝试了一些其他的东西：
ubuntu@ubuntu:~$ sudo mdadm --create /dev/md0 --level=5 --raid-devices=3 /dev/sda1 /dev/sdb1 /dev/sdc1 mdadm: /dev/sda1 appears to contain an ext2fs file system size=1953513472K mtime=Thu Jan 1 00:00:00 1970 mdadm: /dev/sda1 appears to be part of a raid array: level=raid5 devices=6 ctime=Tue Dec 24 21:25:20 2013 mdadm: /dev/sdb1 appears to contain an ext2fs file system size=1953513472K mtime=Thu Jan 1 00:00:00 1970 mdadm: /dev/sdb1 appears to be part of a raid array: level=raid5 devices=6 ctime=Tue Dec 24 21:25:20 2013 mdadm: /dev/sdc1 appears to contain an ext2fs file system size=1953513472K mtime=Thu Jan 1 00:00:00 1970 mdadm: /dev/sdc1 appears to be part of a raid array: level=raid5 devices=6 ctime=Tue Dec 24 21:25:20 2013 Continue creating array? y mdadm: Defaulting to version 1.2 metadata mdadm: array /dev/md0 started. ubuntu@ubuntu:~$ sudo mount /dev/md0 /home mount: wrong fs type, bad option, bad superblock on /dev/md0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so ubuntu@ubuntu:~$ dmesg |tail -30 [173789.684714] md: bind<sdc1> [173789.690771] async_tx: api initialized (async) [173789.764322] raid6: sse2x1 3216 MB/s [173789.832280] raid6: sse2x2 4045 MB/s [173789.900231] raid6: sse2x4 4717 MB/s [173789.900233] raid6: using algorithm sse2x4 (4717 MB/s) [173789.900236] raid6: using ssse3x2 recovery algorithm [173789.908445] md: raid6 personality registered for level 6 [173789.908450] md: raid5 personality registered for level 5 [173789.908452] md: raid4 personality registered for level 4 [173789.909108] md/raid:md0: device sdb1 operational as raid disk 1 [173789.909114] md/raid:md0: device sda1 operational as raid disk 0 [173789.909798] md/raid:md0: allocated 3282kB [173789.909948] md/raid:md0: raid level 5 active with 2 out of 3 devices, algorithm 2 [173789.909952] RAID conf printout: [173789.909954] --- level:5 rd:3 wd:2 [173789.909956] disk 0, o:1, dev:sda1 [173789.909959] disk 1, o:1, dev:sdb1 [173789.909997] md0: detected capacity change from 0 to 4000792444928 [173789.910032] RAID conf printout: [173789.910038] --- level:5 rd:3 wd:2 [173789.910042] disk 0, o:1, dev:sda1 [173789.910045] disk 1, o:1, dev:sdb1 [173789.910047] disk 2, o:1, dev:sdc1 [173789.910176] md: recovery of RAID array md0 [173789.910183] md: minimum _guaranteed_ speed: 1000 KB/sec/disk. [173789.910187] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for recovery. [173789.910204] md: using 128k window, over a total of 1953511936k. [173790.155769] md0: unknown partition table [173803.332895] EXT4-fs (md0): bad geometry: block count 2441889920 exceeds size of device (976755968 blocks)