RE: GRUB warning after replacing disk drive in RAID1

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>{ Convention on kernel.org is to reply-to-all, trim unneeded quoted material, and bottom post or interleave.  Please do so. }

Yes.  thank you.

>Grub1 needs its boot partitions to use v0.90 or v1.0 superblocks.  Grub2 needs the md module in its core to boot from v1.1 or v1.2 superblocks.
>Anyways, because the content of a v1.2 array does not start at the beginning of the member devices, stupid grub doesn't connect sd[abc]1 with your /boot mount >and therefore delivers 'null'.
>And then doesn't know how to link the core together.

can't say I understand all that but does this mean the server can't boot from the replacement drive?  



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