Replacing a failed drive in an md raid1/raid10: Difference between revisions
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*Check | *Check <code># mdadm --detail /dev/md0</code> | ||
**If not, | **If in an array a partition of the failed drive is not marked as faulty, run <code># mdadm --manage /dev/md1 --fail /dev/sda2</code> | ||
**If | **If the kernel doesn't already removed the faild drive from the arrays, remove it by hand: <code># mdadm /dev/md0 --remove /dev/sda1</code> | ||
*Insert a new physical disk | *Insert a new physical disk | ||
*Copy the partition table to the new drive from its mirror: | *Copy the partition table to the new drive from its mirror: | ||
**For gpt partition table: | **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/ | ***<code># sgdisk -G /dev/sda</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> | ** For mbr partition table: <code># sfdisk --dump /dev/sdb | sfdisk /dev/sda</code> | ||
*Add the new drive into the arrays: <code># mdadm /dev/md0 --add /dev/sda1</code> | *Add the new drive into the arrays: <code># mdadm /dev/md0 --add /dev/sda1</code> | ||
** In case of error | |||
<pre>mdadm: Cannot open /dev/sda1: Device or resource busy</pre> | |||
check if the md subsystem created <code>/dev/md127</code> from <code>/dev/sda1</code>. In this case run <code>mdadm --stop /dev/md127</code> and then re-run <code>mdadm /dev/md0 --add /dev/sda1</code> | |||
* Update <code>/etc/smartd.conf</code> | |||
*Observe the mirroring process with <code>$ watch cat /proc/mdstat</code> | *Observe the mirroring process with <code>$ watch cat /proc/mdstat</code> | ||
[[Category: Linux]] | [[Category: Linux]] | ||
[[Category: Hardware]] | [[Category: Hardware]] | ||
Latest revision as of 21:05, 18 January 2023
- Check
# mdadm --detail /dev/md0- If in an array a partition of the failed drive is not marked as faulty, run
# mdadm --manage /dev/md1 --fail /dev/sda2 - If the kernel doesn't already removed the faild drive from the arrays, 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, run
- 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(fromsdbtosda)# sgdisk -G /dev/sda(to make the new disk's GUID different the mirror's one)
- For mbr partition table:
# sfdisk --dump /dev/sdb | sfdisk /dev/sda
- For gpt partition table:
- Add the new drive into the arrays:
# mdadm /dev/md0 --add /dev/sda1- In case of error
mdadm: Cannot open /dev/sda1: Device or resource busy
check if the md subsystem created /dev/md127 from /dev/sda1. In this case run mdadm --stop /dev/md127 and then re-run mdadm /dev/md0 --add /dev/sda1
- Update
/etc/smartd.conf - Observe the mirroring process with
$ watch cat /proc/mdstat