best way to move (sync) large data files around a network (adsl lines)

Hi, we have several sights around the country ranging from 512   to 2mb links  between them,

each sight has an array (file server) which needs to be an exact copy of our central file server.

there is no great rush for this to be done over a few days or over night is fine.

I would estimate 10 to 20 gigs of data to get transfed from the central site to the others each week as a minium  150 as a max.

we currently use novell4.11 for this data storage but can change to anything needed.

what would you suggest is the best way to go about it?  Microsoft solution prefered...

is theer anything which can monitor what is on each file server and refernce it back to the central file server and update where needed?
mhamerAsked:
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andyalderSaggar maker's bottom knockerCommented:
I'm confused, the data is on Netware but you want to use a microsoft solution?

Veritas Volume Replicator for Windows if you change to win2k, once initial replication has completed it is only the changes that get replicated so if someone edits a single line in a 10GB file it is only one diskblock that gets replicated, not the whole file.
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mhamerAuthor Commented:
we would rather use Microsoft, as the rest of our network is w2k,  netware is just for this specific job and was here when i started..

cheers
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NicholasSchoonoverCommented:
You should go to http://www.NSISoftware.com after your jaw hits the floor when Veritas quotes out VVR. The software alone will come in at around $8,000 per machine. NSI Double-Take does real-time replication for $2,500.
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mhamerAuthor Commented:
yes it did hit the floor :-) cheers
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