[TUHS] Whence 1st Edition Unix Kernel Assembly?
Larry McVoy
lm at bitmover.com
Fri Apr 25 05:02:39 AEST 2008
On Thu, Apr 24, 2008 at 12:57:12PM -0600, M. Warner Losh wrote:
> In message: <4810D417.8040005 at bitsavers.org>
> Al Kossow <aek at bitsavers.org> writes:
> : The critical point to add to this is that the data integrity needs to be
> : constantly verified, even on presumed stable storage, and it is migrated
> : to what at that time is easily to deal with storage, so you CAN easily
> : verify it.
>
> I keep my archives on a series of disks. There's always at least 2
> copies, often times more, and the underlying disks get swapped out on
> a round-robin basis. Helps limit my exposure to one or two
> failures... I've had horrible luck with all other methods...
We do the same thing here. For /home which has all the stuff we really
care about we have
/nightly - last night's copy of the data
/nightly2 - same thing, night before
/weekly - last Sunday's copy of the data
/weekly2 - same thing, week before
and we do it so that
diff foo /nightly/$PWD
works. Handy, that.
--
---
Larry McVoy lm at bitmover.com http://www.bitkeeper.com
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