[mythtv-users] Rebuild raid array ?

[Jan Ceuleers]

On 23/11/10 18:07, John Drescher wrote:

> Are all of your arrays type fd in fdisk?

As an aside I need to mention that my arrays won't actually assemble 
properly at boot if I mark them as type fd (i.e. Linux RAID auto-detect) 
because of weird interference between the in-kernel RAID detection code 
and the initrd's RAID detection and assembly attempts using mdadm.

By "not assembling properly" I mean that the array members are 
misdetected. For example, a disk that contains two partitions, each of 
which are of type fd and are indeed members of (different) arrays might 
itself be detected as an array member. That's the whole disk, not any 
partition on it.

I can fix the above problem by making no other changes than setting the 
partitions to type 83.

My recommendation is therefore to steer clear of partition type fd and 
to ensure that your initrd contains what is required to assemble your 
arrays. Note that the system on which I experienced the above issues 
boots from RAID1 using grub2.

HTH, Jan