3 Apr
2014
3 Apr
'14
10:46 p.m.
If you dd, cat, dump, or skip-to-my-Lou the disk
you're running on,
you won't likely get a good result. You certainly won't get a
*reliable* result, [...]
Well, I've never worked with an AT&T Unix PC. But on every Unix
variant I _have_ used, if you snapshot a disk that way you will be just
fine _provided_ that no write activity occurs during the snapshot.
This generally means either booting with it mounted read-only (usually,
single-user) or making sure the system is totally quiescent. Under
such circumstances, it's as reliably good as the state you'd get from
an abrupt power-down.
Is the Unix PC any different in this respect?
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