[CentOS] Replacing SW RAID-1 with SSD RAID-1

Tue Nov 24 16:43:57 UTC 2020
Kenneth Porter <shiva at sewingwitch.com>

--On Monday, November 23, 2020 4:46 PM +0100 Simon Matter 
<simon.matter at invoca.ch> wrote:

> I suggest to "mdadm --fail" one drive, then "mdadm --remove" it. After
> replacing the drive you can "mdadm --add" it.

Does it make sense to dd or ddrescue from the removed drive to the 
replacement? My md RAID set is on primary partitions, not raw drives, so 
I'm assuming the replacement drive needs at least the boot sector from the 
old drive to copy the partition data.