mdadm --fail and superblock

Kernels & Hardware, configuring network, installing services

mdadm --fail and superblock

Postby ctrl » 2017-11-22 21:53

Hi, I was wondering what happens to the superblock of a disk manually failed and removed with mdadm. Does that prevent the disk to be used again as a valid member? I mean: if I move the failed HDD to another system, would I be theoretically able to rebuild an array starting from it? Like a bizarre and dangerous way of cloning the array...
ctrl
 
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Re: mdadm --fail and superblock

Postby p.H » 2017-11-23 12:33

ctrl wrote: what happens to the superblock of a disk manually failed and removed with mdadm.

Nothing. Only the superblocks of the remaining members are updated.

ctrl wrote:if I move the failed HDD to another system, would I be theoretically able to rebuild an array starting from it?

Yes, if it is RAID 1.
p.H
 
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