I look forward using UnionFS for this purpose:
On a six disks array, 5 disks are remounted read-only, and the last one get all the writings, until we need to commit the changes to the first 5 disks.
The aim is to spin down those disks most of the time, waking them up for a batch write of the changes.
1st part:
I understand UnionFS can allow us to virtually write to a read-only FS on a hard disk.
2nd part:
Can someone tell us if there is any way to write back the changes to the source FS after a remount read-write ?
Thanks,
David G.M.
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