Oh carp, destroyed my MDADM array??

[Roland0]

I noticed That my Raid1 array was missing a Disk it appeared as .

So i didnt think anything of doing a quick

mdadm --grow /dev/mdX --raid-devices=2

and then:

mdadm --add /dev/mdx /dev/sdx

I then left it to sync up, happy days.

But I added the block device; i.e. /dev/sdb NOT the partition ie /dev/sdb1 (how did this work?)

Now when I attempt to mount the array, it fails as the partition ID is fd (linux raid autodetect ) and not 83 (linux).

will this have nuked my actual data, or can I change the partition id using sfdisk?

Any Gurus here any ideas? I'd rather have NOT lost it!

 

[Roland0]

Thanks KIA,

I'm gonna try those tools, and ad them to my arsenal if they're good, have you used them much ?? But I take it you think it's deffo destroyed, I've a feeling i might be able to change the partition ID and sort it?

And would those tools work with MDADM based RAID ?

Again thanks.