[Gllug] RAID on RAID

[Tethys]

Rich Walker writes:

<various stuff about storage strategies>

Which reminded me that I'd been meaning to ask about that. As far as
I can see, the only way to do mirroring in Linux is with md, which
sits below LVM. This is a hideously broken design. Say I add a new
disk to my system, and decide I want to mirror the old disk. It can't
be done because the mirror needs to be created before the filesystem.

Does anyone know of a way of doing mirroring at the volume management
level, as can be done with other OSes?

Tet
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