Replacing a failed drive in an md raid1/raid10: Difference between revisions

Revision as of 20:15, 2 July 2015

Check if the kernel already removed the faild drive from the arrays: # mdadm --detail /dev/md0
- If not, remove it by hand: # mdadm /dev/md0 --remove /dev/sda1
- If in an array a partition of the failed drive is not marked as faulty, before removing run # mdadm --manage /dev/md1 --fail /dev/sda2
Insert a new physical disk
Copy the partition table to the new drive from its mirror:
- For gpt partition table:
  - # sgdisk -R /dev/sda /dev/sdb (from sdb to sda)
  - # sgdisk -G /dev/sdb (to make the new disk's GUID different the mirror's one)
- For mbr partition table: # sfdisk --dump /dev/sdb | sfdisk /dev/sda

@@ Line 5: / Line 5: @@
 *Copy the partition table to the new drive from its mirror:
 **For gpt partition table:
-***# <code>sgdisk -R /dev/sda /dev/sdb</code> (from <code>sdb</code> to <code>sda</code>)
+***<code># sgdisk -R /dev/sda /dev/sdb</code> (from <code>sdb</code> to <code>sda</code>)
-***# <code>sgdisk -G /dev/sdb</code> (to make the new disk's GUID different the mirror's one)
+***<code># sgdisk -G /dev/sdb</code> (to make the new disk's GUID different the mirror's one)
 ** For mbr partition table: <code># sfdisk --dump /dev/sdb | sfdisk /dev/sda</code>
 [[Category: Linux]]