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"John" == John Robinson [off-list ref] writes:
John> Even sadder, when a raid 0/4/5/6 is reshaped over more discs (and
John> probably other scenarios outwith md),
I'm not sure I agree with the whole "sad" sentiment. Just because
ext[234] doesn't query devices automatically doesn't mean the technology
doesn't exist. I wrote the MD/LVM extraction code for XFS in 2001.
John> both stripe-width and stride-size change. Is there any prospect
John> this new stacking could give us the opportunity to tell our client
John> (LVM, filesystem, whatever) about the change, or that they'll be
John> able to take advantage of it?
When you resize the fs it would have to compare the new topology to the
old one and adjust accordingly.
--
Martin K. Petersen Oracle Linux Engineering