For (c) we can use device-mapper snapshots to mount a ramdisk above
the disks themselves. This allows us to make non-destructive changes
to files, and still see the "modified" block device (d). A hairy
For (c) we can use device-mapper snapshots to mount a ramdisk above
the disks themselves. This allows us to make non-destructive changes
to files, and still see the "modified" block device (d). A hairy