> There should be no read-only snapshot: it's just a writable snapshot where you don't happen to perform a write
So when malware comes along and goes after the live copy, and happens to find the 'snapshot', but is able to hose that snapshot data as well, the solution is to go to tape?
As opposed to any other file system that implements read-only snapshots, if the live copy is hosed, one can simply clone/revert to the read-only copy. (This is not a hypothetical: I've done this personally.)
(Certainly one should have off-device/site backups, but being able to do a quick revert is great for MTTR.)
So when malware comes along and goes after the live copy, and happens to find the 'snapshot', but is able to hose that snapshot data as well, the solution is to go to tape?
As opposed to any other file system that implements read-only snapshots, if the live copy is hosed, one can simply clone/revert to the read-only copy. (This is not a hypothetical: I've done this personally.)
(Certainly one should have off-device/site backups, but being able to do a quick revert is great for MTTR.)