我希望有人可以引导我解决重建/同步问题。我在 mdadm 4 个磁盘中构建了 3 个 raid 5，每个 md0（活动，降级）、md1（活动、降级）和 md2（干净）中没有数据，所以我不关心它。
所有 12 个驱动器均连接至 LSI 9750-8i 卡。所有潜水都作为单个“单元”附加到这张卡上。一个驱动器出现故障并显示为 LSI 3dm2 接口缺失。在 Mdadm 中，阵列还将驱动器显示为“已删除”。
更复杂的是，第二个阵列也显示为活动状态，由于潜水“删除”而降级
我已关闭系统并用另一个新驱动器更换了出现故障的 3TB 驱动器。由于我知道故障前存在哪些驱动器，因此我知道哪两个驱动器不再属于阵列。 sdh = 已跳出阵列之一的驱动器。 sd0 = 已安装的新物理驱动器。超级块是持久的。
问题#1。我可以查询潜水器的序列号，但我似乎无法找出 sdh 最初属于哪个阵列，希望我可以将其添加回正确的阵列。
问题#2。根据 sdf 属于哪一个，将 sdo 添加到 md'x' 数组中。
LSI 3dm2 中报告了一些物理驱动器错误，但重新扫描后这些错误消失了，并且此级别的所有驱动器现在都报告“正常”。然而，这可能是 sdf 最初从阵列中“掉出”的问题的一部分？
我想，我必须使用 gpart 格式化 3TB 驱动器，然后将其添加到另一个阵列吗？我有生产 NAS 的备份。我不想因为犯错误而导致重建......
如果有人可以就如何去做提出一些建议，那就太好了！ TIA
来自猫/proc
[root@pithos dev]# cat /proc/mdstat Personalities : [raid6] [raid5 [raid4]
md0 : active raid5 sdc1[0] sdd1[4] sde1[2]
8789025216 blocks super 1.2 level 5, 64k chunk, algorithm 2 [4/3] [U_UU]
md1 : active raid5 sdf1[0] sdi1[4] sdg1[1]
8789025216 blocks super 1.2 level 5, 64k chunk, algorithm 2 [4/3] [UU_U]
md2 : active raid5 sdj1[0] sdm1[4] sdl1[2] sdk1[1]
8789025216 blocks super 1.2 level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
unused devices: <none>
中度
[root@pithos dev]# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Fri May 31 10:46:54 2013
Raid Level : raid5
Array Size : 8789025216 (8381.87 GiB 8999.96 GB)
Used Dev Size : 2929675072 (2793.96 GiB 2999.99 GB)
Raid Devices : 4
Total Devices : 3
Persistence : Superblock is persistent
Update Time : Fri Jul 8 18:07:27 2016
State : active, degraded
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : pithos.dougallmedia.com:0 (local to host pithos.dougallmedia.com)
UUID : f1e42a86:7fc791f8:7cf63ab8:065ffa92
Events : 3543
Number Major Minor RaidDevice State
0 8 33 0 active sync /dev/sdc1
1 0 0 1 removed
2 8 65 2 active sync /dev/sde1
4 8 49 3 active sync /dev/sdd1
MD1
[root@pithos dev]# mdadm -D /dev/md1
/dev/md1:
Version : 1.2
Creation Time : Fri May 31 17:44:49 2013
Raid Level : raid5
Array Size : 8789025216 (8381.87 GiB 8999.96 GB)
Used Dev Size : 2929675072 (2793.96 GiB 2999.99 GB)
Raid Devices : 4
Total Devices : 3
Persistence : Superblock is persistent
Update Time : Tue Jul 12 11:31:52 2016
State : clean, degraded
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : pithos.dougallmedia.com:1 (local to host pithos.dougallmedia.com)
UUID : 58ba8949:bed7be0b:ba4dcc3e:8e6bc5e2
Events : 9779
Number Major Minor RaidDevice State
0 8 81 0 active sync /dev/sdf1
1 8 97 1 active sync /dev/sdg1
2 0 0 2 removed
4 8 129 3 active sync /dev/sdi1
[root@pithos dev]# mdadm --assemble --scan -v
mdadm: looking for devices for /dev/md2
mdadm: Cannot assemble mbr metadata on /dev/sdo
mdadm: cannot open device /dev/dm-10: Device or resource busy
mdadm: cannot open device /dev/dm-9: Device or resource busy
mdadm: cannot open device /dev/dm-8: Device or resource busy
mdadm: cannot open device /dev/dm-7: Device or resource busy
mdadm: cannot open device /dev/dm-6: Device or resource busy
mdadm: cannot open device /dev/dm-5: Device or resource busy
mdadm: cannot open device /dev/md0: Device or resource busy
mdadm: cannot open device /dev/md1: Device or resource busy
mdadm: no recogniseable superblock on /dev/md2
mdadm: Cannot assemble mbr metadata on /dev/sdn
mdadm: cannot open device /dev/dm-4: Device or resource busy
mdadm: cannot open device /dev/dm-3: Device or resource busy
mdadm: cannot open device /dev/dm-2: Device or resource busy
mdadm: cannot open device /dev/dm-1: Device or resource busy
mdadm: cannot open device /dev/dm-0: Device or resource busy
mdadm: cannot open device /dev/sdk1: Device or resource busy
mdadm: cannot open device /dev/sdk: Device or resource busy
mdadm: cannot open device /dev/sdm1: Device or resource busy
mdadm: cannot open device /dev/sdm: Device or resource busy
mdadm: cannot open device /dev/sdl1: Device or resource busy
mdadm: cannot open device /dev/sdl: Device or resource busy
mdadm: cannot open device /dev/sdj1: Device or resource busy
mdadm: cannot open device /dev/sdj: Device or resource busy
mdadm: cannot open device /dev/sdg1: Device or resource busy
mdadm: cannot open device /dev/sdg: Device or resource busy
mdadm: cannot open device /dev/sdi1: Device or resource busy
mdadm: cannot open device /dev/sdi: Device or resource busy
mdadm: /dev/sdh1 has wrong uuid.
mdadm: Cannot assemble mbr metadata on /dev/sdh
mdadm: cannot open device /dev/sdd1: Device or resource busy
mdadm: cannot open device /dev/sdd: Device or resource busy
mdadm: cannot open device /dev/sde1: Device or resource busy
mdadm: cannot open device /dev/sde: Device or resource busy
mdadm: cannot open device /dev/sdf1: Device or resource busy
mdadm: cannot open device /dev/sdf: Device or resource busy
mdadm: cannot open device /dev/sdc1: Device or resource busy
mdadm: cannot open device /dev/sdc: Device or resource busy
mdadm: cannot open device /dev/sdb: Device or resource busy
mdadm: cannot open device /dev/sda: Device or resource busy
mdadm: looking for devices for /dev/md1
mdadm: Cannot assemble mbr metadata on /dev/sdo
mdadm: cannot open device /dev/dm-10: Device or resource busy
mdadm: cannot open device /dev/dm-9: Device or resource busy
mdadm: cannot open device /dev/dm-8: Device or resource busy
mdadm: cannot open device /dev/dm-7: Device or resource busy
mdadm: cannot open device /dev/dm-6: Device or resource busy
mdadm: cannot open device /dev/dm-5: Device or resource busy
mdadm: cannot open device /dev/md0: Device or resource busy
mdadm: cannot open device /dev/md1: Device or resource busy
mdadm: no recogniseable superblock on /dev/md2
mdadm: Cannot assemble mbr metadata on /dev/sdn
mdadm: cannot open device /dev/dm-4: Device or resource busy
mdadm: cannot open device /dev/dm-3: Device or resource busy
mdadm: cannot open device /dev/dm-2: Device or resource busy
mdadm: cannot open device /dev/dm-1: Device or resource busy
mdadm: cannot open device /dev/dm-0: Device or resource busy
mdadm: cannot open device /dev/sdk1: Device or resource busy
mdadm: cannot open device /dev/sdk: Device or resource busy
mdadm: cannot open device /dev/sdm1: Device or resource busy
mdadm: cannot open device /dev/sdm: Device or resource busy
mdadm: cannot open device /dev/sdl1: Device or resource busy
mdadm: cannot open device /dev/sdl: Device or resource busy
mdadm: cannot open device /dev/sdj1: Device or resource busy
mdadm: cannot open device /dev/sdj: Device or resource busy
mdadm: cannot open device /dev/sdg1: Device or resource busy
mdadm: cannot open device /dev/sdg: Device or resource busy
mdadm: cannot open device /dev/sdi1: Device or resource busy
mdadm: cannot open device /dev/sdi: Device or resource busy
mdadm: /dev/sdh1 has wrong uuid.
mdadm: Cannot assemble mbr metadata on /dev/sdh
mdadm: cannot open device /dev/sdd1: Device or resource busy
mdadm: cannot open device /dev/sdd: Device or resource busy
mdadm: cannot open device /dev/sde1: Device or resource busy
mdadm: cannot open device /dev/sde: Device or resource busy
mdadm: cannot open device /dev/sdf1: Device or resource busy
mdadm: cannot open device /dev/sdf: Device or resource busy
mdadm: cannot open device /dev/sdc1: Device or resource busy
mdadm: cannot open device /dev/sdc: Device or resource busy
mdadm: cannot open device /dev/sdb: Device or resource busy
mdadm: cannot open device /dev/sda: Device or resource busy
mdadm: looking for devices for /dev/md0
mdadm: Cannot assemble mbr metadata on /dev/sdo
mdadm: cannot open device /dev/dm-10: Device or resource busy
mdadm: cannot open device /dev/dm-9: Device or resource busy
mdadm: cannot open device /dev/dm-8: Device or resource busy
mdadm: cannot open device /dev/dm-7: Device or resource busy
mdadm: cannot open device /dev/dm-6: Device or resource busy
mdadm: cannot open device /dev/dm-5: Device or resource busy
mdadm: cannot open device /dev/md0: Device or resource busy
mdadm: cannot open device /dev/md1: Device or resource busy
mdadm: no recogniseable superblock on /dev/md2
mdadm: Cannot assemble mbr metadata on /dev/sdn
mdadm: cannot open device /dev/dm-4: Device or resource busy
mdadm: cannot open device /dev/dm-3: Device or resource busy
mdadm: cannot open device /dev/dm-2: Device or resource busy
mdadm: cannot open device /dev/dm-1: Device or resource busy
mdadm: cannot open device /dev/dm-0: Device or resource busy
mdadm: cannot open device /dev/sdk1: Device or resource busy
mdadm: cannot open device /dev/sdk: Device or resource busy
mdadm: cannot open device /dev/sdm1: Device or resource busy
mdadm: cannot open device /dev/sdm: Device or resource busy
mdadm: cannot open device /dev/sdl1: Device or resource busy
mdadm: cannot open device /dev/sdl: Device or resource busy
mdadm: cannot open device /dev/sdj1: Device or resource busy
mdadm: cannot open device /dev/sdj: Device or resource busy
mdadm: cannot open device /dev/sdg1: Device or resource busy
mdadm: cannot open device /dev/sdg: Device or resource busy
mdadm: cannot open device /dev/sdi1: Device or resource busy
mdadm: cannot open device /dev/sdi: Device or resource busy
mdadm: no recogniseable superblock on /dev/sdh1
mdadm: Cannot assemble mbr metadata on /dev/sdh
mdadm: cannot open device /dev/sdd1: Device or resource busy
mdadm: cannot open device /dev/sdd: Device or resource busy
mdadm: cannot open device /dev/sde1: Device or resource busy
mdadm: cannot open device /dev/sde: Device or resource busy
mdadm: cannot open device /dev/sdf1: Device or resource busy
mdadm: cannot open device /dev/sdf: Device or resource busy
mdadm: cannot open device /dev/sdc1: Device or resource busy
mdadm: cannot open device /dev/sdc: Device or resource busy
mdadm: cannot open device /dev/sdb: Device or resource busy
mdadm: cannot open device /dev/sda: Device or resource busy
答案1
问题#1。我可以查询潜水器的序列号，但我似乎无法找出 sdh 最初属于哪个阵列，希望我可以将其添加回正确的阵列。
使用mdadm -E /dev/sdh1（检查）。然后你可以使用mdadm --re-add ...或--add。
此外，如果您的其他磁盘运行状况良好，您可以简单地重建该磁盘，即使它已经有数据。
如果这不起作用，您可能必须mdadm --create --assume-clean ...在旧数据之上创建一个新数组，重新使用数据，这是危险的。请务必保存您的详细信息 ( -D) 并首先检查所有磁盘的输出。您必须显式设置在检查或详细输出中看到的许多内容，例如布局、级别、驱动器顺序、块大小等。为了安全使用--create，一定要好好测试一下覆盖层而不是让您的数据面临风险。使用--assume-clean意味着它将保留您的旧数据。
问题#2。根据 sdf 属于哪一个，将 sdo 添加到 md'x' 数组中。
mdadm -E即使您没有完成覆盖，您也可以在知道要将其添加到哪个数组后执行此步骤，而且它也只是mdadm --add /dev/md0 /dev/sdo
我还建议您经常在磁盘上运行智能长测试，这样您就可以在磁盘引起 raid 问题之前更换磁盘。 （希捷 Barracuda 3TB 磁盘也是非常不可靠...我的猜测是，这就是你所拥有的，这不是 mdadm 的错；添加智能测试也将有助于解决这些类型的问题。）
我建议您访问 irc.freenode.net #linux-raid 以获得针对此类问题的最佳实时帮助。