软raid10故障，求指点解决思路或恢复方法！！

ajim1000 · 发表于 2015-12-10 11:27:07

一、环境
共五块硬盘一块SSD 80G安装xenserver6.2系统，四块3T组成raid10软阵列（无阵列卡也未通过BIOS组阵列）。

二、现状
机房断电后，开机不能开启xencenter 6.2中的虚拟机，提示启动VM时出错，原因”从该服务器无法看到此VM需要的存储“。修复存储库 local raid10md0(LVM)时提示“存储库不可用”。进xenserver 查看有提示"SR未连接PBD"、“ this storage repository is unplugged and not usable by this host“
运行 mdadm -As /dev/md0/ 时提示”dev/md0 assembled from 2 drives - not enough to start the array“

三、mdadm得到的信息（如需其他信息会回帖补充）
mdadm -E /dev/sdb1
mdadm: metadata format 1.00 unknown, ignored.
/dev/sdb1:
      Magic : a92b4efc
      Version : 1.0
Feature Map : 0x0
   Array UUID : 688c2823:87a04118:3f7561ab:d7b7b63b
         Name : 0
  Creation Time : Mon May 26 23:36:57 2014
   Raid Level : raid10
Raid Devices : 4

Avail Dev Size : 5860528984 (2794.52 GiB 3000.59 GB)
   Array Size : 11721057792 (5589.04 GiB 6001.18 GB)
  Used Dev Size : 5860528896 (2794.52 GiB 3000.59 GB)
Super Offset : 5860529240 sectors
      State : active
Device UUID : 9a050f98:7e813887:ba88d045:ee556313

Update Time : Mon Dec  7 13:54:41 2015
   Checksum : 9e8b310 - correct
      Events : 65354381

      Layout : near=2
  Chunk Size : 64K

Array Slot : 0 (0, 1, failed, failed)
Array State : Uu__ 2 failed

root@XenServer1 ~]# mdadm -E /dev/sdc1
mdadm: metadata format 1.00 unknown, ignored.
/dev/sdc1:
      Magic : a92b4efc
      Version : 1.0
Feature Map : 0x0
   Array UUID : 688c2823:87a04118:3f7561ab:d7b7b63b
         Name : 0
  Creation Time : Mon May 26 23:36:57 2014
   Raid Level : raid10
Raid Devices : 4

Avail Dev Size : 5860528984 (2794.52 GiB 3000.59 GB)
   Array Size : 11721057792 (5589.04 GiB 6001.18 GB)
  Used Dev Size : 5860528896 (2794.52 GiB 3000.59 GB)
Super Offset : 5860529240 sectors
      State : active
Device UUID : af0ddce3:48fa6b6c:f7d1c6f7:be8c5c9a

Update Time : Mon Dec  7 13:54:41 2015
   Checksum : 73d886ee - correct
      Events : 65354381

      Layout : near=2
   Chunk Size : 64K
Array Slot : 1 (0, 1, failed, failed)
Array State : uU__ 2 failed

[root@XenServer1 ~]# mdadm -E /dev/sdd1
mdadm: metadata format 1.00 unknown, ignored.
/dev/sdd1:
      Magic : a92b4efc
      Version : 1.0
Feature Map : 0x0
   Array UUID : 688c2823:87a04118:3f7561ab:d7b7b63b
         Name : 0
  Creation Time : Mon May 26 23:36:57 2014
   Raid Level : raid10
Raid Devices : 4

Avail Dev Size : 5860528984 (2794.52 GiB 3000.59 GB)
   Array Size : 11721057792 (5589.04 GiB 6001.18 GB)
  Used Dev Size : 5860528896 (2794.52 GiB 3000.59 GB)
Super Offset : 5860529240 sectors
      State : active
Device UUID : e92e5b37:e2a87c36:aace631f:9dc6c414

Update Time : Sun Sep  7 05:45:46 2014
   Checksum : 2d32b5c9 - correct
      Events : 407
Layout : near=2
   Chunk Size : 64K

    Array Slot : 2 (0, 1, 2, 3)
Array State : uuUu

[root@XenServer1 ~]# mdadm -E /dev/sde1
mdadm: metadata format 1.00 unknown, ignored.
/dev/sde1:
      Magic : a92b4efc
      Version : 1.0
Feature Map : 0x0
   Array UUID : 688c2823:87a04118:3f7561ab:d7b7b63b
         Name : 0
  Creation Time : Mon May 26 23:36:57 2014
   Raid Level : raid10
Raid Devices : 4

Avail Dev Size : 5860528984 (2794.52 GiB 3000.59 GB)
   Array Size : 11721057792 (5589.04 GiB 6001.18 GB)
  Used Dev Size : 5860528896 (2794.52 GiB 3000.59 GB)
Super Offset : 5860529240 sectors
      State : active
Device UUID : 736d3d6f:e7e3578f:5d162d70:8877388c
Update Time : Mon Dec  7 13:40:29 2015
   Checksum : 8c6d6327 - correct
      Events : 65354375

      Layout : near=2
   Chunk Size : 64K

Array Slot : 3 (0, 1, failed, 3)
Array State : uu_U 1 failed

三、fdisk -l 可看到/dev/sda1(80G)