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Re: how to install grub to non-bootable RAID-formatted drive?



On Fri, Jan 23, 2026 at 09:05:20AM +0000, David wrote:

> But, crucially, if RAID made the two disks identical, then the code that
> grub is looking for is very likely already present on the drive you have.

Be careful: there are 2 ways of setting up RAID-1 (mirror) for a partitioned disk:

• mirror the entire disk, ie sda & sdb

• mirror partition by partition, ie sda1 & sdb1; sda2 & sdb2; ...

If the second way then unless grub-install is run on both disks then it might
only be present on one of them.

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Alain Williams
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