Am 07.02.20 um 15:49 schrieb Ram Ramesh: >>> 4. Make both bootable. (I suppose I need to change UUID of md1 >>> partitions. I suppose that is easy) >> Yes it's easy. Yes it should have been done a LOOONG time ago. > Not if you break md0 into degraded md0 and md1. grub.cfg need to be > updated after that fact and UUID update is only doable after breakup. > Again not sure if I am missing something important implied by LOONG in > your answer grub itself is installed before the RAID and there is no need to change any UUID - you just spit out one of the disks from your RAID, work in degraded mode and if everyhting goes wrong you boot with a recue media and assemble that disk, zero the one with the damaged OS and resync
