Bernhard Brunner's Blog

Link to this comparison view

--- blog:replace_faulty_disk_in_linux_md [2011-08-31 17:10] – brb
+++ blog:replace_faulty_disk_in_linux_md [2014-01-04 11:56] (current) – brb
@@ Line 2: / Line 2: @@
 Replacing a faulty drive in an mdadm managed RAID array.
-  - Use "mdadm --manage /dev/md0 -r /dev/sdd" to remove the drive that was marked as faulty from the array.
+  - Use 'mdadm --manage /dev/mdX -r /dev/sdF' to remove the drive that was marked as faulty from the array.
   - Power down and replace the drive with a good drive.
+  - Power up and set the partition table on the new drive to match those of the other drives in the array. Here we used 'sfdisk -d /dev/sdN | sfdisk /dev/sdF'.
+  - Add the proper partition on the new drive into the array, 'mdadm --manage /dev/mdX -a /dev/sdN2'
+  - Sit back and wait for the recovery to happen. The system will be a bit slow but usable.
-  - Power up and set the partition table on the new drive to match those of the other drives in the array. Here we used "sfdisk -d /dev/sda | sfdisk /dev/sdd".
+Ref:
+  * http://www.linuxquestions.org/questions/linux-server-73/mdadm-raid-5-single-drive-failure-644325/#post3173822
-  - Add the proper partition on the new drive into the array, "mdadm --manage /dev/md0 -a /dev/sdd2"
+  * http://askubuntu.com/questions/57908/how-can-i-quickly-copy-a-gpt-partition-scheme-from-one-hard-drive-to-another/57922#57922
+  * http://www.cyberciti.biz/tips/re-read-the-partition-table-without-rebooting-linux-system.html
-  - Sit back and wait for the recovery to happen, you can "cat /proc/mdstat" to watch its progress; you should see something like:
-Ref: http://www.linuxquestions.org/questions/linux-server-73/mdadm-raid-5-single-drive-failure-644325/#post3173822
 {{tag>linux raid}}