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RAID故障后如何启动（软件RAID）？

tag-icon • tag-icon grub mdadm
RAID故障后如何启动（软件RAID）？

之前我使用 ( mdadm) 驱动器sda和sdb.sdb失败，重新启动系统的唯一方法是拔掉第二个硬盘驱动器。

现在我已将新的sdb和添加sdc到我的 RAID 设置中。sda是最旧的（因此最有可能失败），并且它是我们启动的驱动器（我想，我该如何检查？）。

我如何确保和测试（通过 GRUB 配置等）如果sda失败，我仍然能够启动我的机器。

fdisk -l:

Disk /dev/sda: 250.0 GB, 250000000000 bytes
255 heads, 63 sectors/track, 30394 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000080

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1       30064   241489048+  fd  Linux raid autodetect
/dev/sda2           30065       30394     2650725    5  Extended
/dev/sda5           30065       30394     2650693+  fd  Linux raid autodetect

Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1       30064   241489048+  fd  Linux raid autodetect
Partition 1 does not start on physical sector boundary.
/dev/sdb2           30065       30394     2650725    5  Extended
/dev/sdb5           30065       30394     2650693+  fd  Linux raid autodetect
Partition 5 does not start on physical sector boundary.

Disk /dev/sdc: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1   *           1       30064   241489048+  fd  Linux raid autodetect
Partition 1 does not start on physical sector boundary.
/dev/sdc2           30065       30394     2650725    5  Extended
/dev/sdc5           30065       30394     2650693+  fd  Linux raid autodetect
Partition 5 does not start on physical sector boundary.

Disk /dev/md0: 247.3 GB, 247284695040 bytes
2 heads, 4 sectors/track, 60372240 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Alignment offset: 512 bytes
Disk identifier: 0x00000000

Disk /dev/md0 doesn't contain a valid partition table

Disk /dev/md1: 2714 MB, 2714238976 bytes
2 heads, 4 sectors/track, 662656 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Alignment offset: 512 bytes
Disk identifier: 0x00000000

Disk /dev/md1 doesn't contain a valid partition table

答案1

你不能。在这种情况下，只有拔掉 sda 会有帮助。在这种情况下，sdb 将是 sda...（令人头疼的 Linux 设备编号 - Solaris 和 HP-Unix 使用 SCSI-ID。）

因此，对于引导加载程序，您应该将其安装在 sda 上，然后将其复制dd到 sdb 和 sdc。

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