Re: Hot swapping failed disk /dev/sda in RAID 1 array
Hi Urs,
On Tue, Jul 19, 2016 at 04:01:39PM +0200, Urs Thuermann wrote:
> 2. Can I hotplug the new drive and rebuild the RAID array?
It should work, if your SATA port supports hotplug. Plug the new
drive in and see if the new device node appears. If it does then
you're probably good to go.
You can dump out the partition table from an existing drive with
something like:
# sfdisk -d /dev/sdb > sdb.out
And then partition the new drive the same with something like:
# sfdisk /dev/sdc < sdb.out
(assuming sdb is your working existing drive and sdc is the device
node of the new drive)
Then add the new device to the md with something like:
# mdadm /dev/md0 --add /dev/sdc1
(assuming your array is md0; adjust to suit)
At that point /proc/mdstat should show a rebuild taking place.
If you run into difficulty try asking on the linux-raid mailing list
- it's very good for support and it's best to ask there before doing
anything that you have the slightest doubt about!
Cheers,
Andy
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