Re: [Fed-Talk] TimeMachine use in Fed space... opinions?
Re: [Fed-Talk] TimeMachine use in Fed space... opinions?
- Subject: Re: [Fed-Talk] TimeMachine use in Fed space... opinions?
- From: "Timothy J. Miller" <email@hidden>
- Date: Wed, 4 Mar 2009 17:03:43 -0600
Shawn A. Geddis wrote:
Time Machine does not allow for backup to a SAN. You can assign a
Time Machine backup to a network volume, but it must be one designated
by a Mac OS X Server specifically for TM.
Well, not really:
http://appleclinic.wordpress.com/2008/10/30/time-machine-on-nas/
Of course, such a thing is completely unsupported by Apple. And there
is a risk: Getting an ACK packet from the NAS is not the same as having
the data written to disk. So if you're using an unsupported network
drive and there's a failure, you could end up with incomplete data in
the backup. That's a Bad Thing.
Time Capsule gets around this problem by using a modified network stack.
In short, it doesn't send ACK data packets until the disk driver
confirms it's written to disk. This sort of coupling of disk driver to
network driver is, shall we say, unusual. :)
-- Tim
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