I'm liking Simon's solution as a first step....

200 GB * 1024 = 204800 MB
204800 MB/3600 sec = 5.6 MB/sec

Assuming a 100 Mbit/sec LAN, and giving you the benefit of the doubt on
the bits per byte and protocol efficiency calculations, the best you can
hope for is 10 Mbytes/sec over the LAN, and you are getting 56% of that.
Factor in the inherent slowness of brick-level backup (getting away from
this is another good recommendation), think time on the client,
bandwidth contention (applications if you are using the corporate LAN,
and other backup traffic on a backup LAN), and your rates do not seem
unusual.

Back in the day when backup was my life, 200 GB was a fairly common
architectural threshold for SAN attaching a server for backup instead of
going over the net.

Mark

By the way - the comments above are  my own, and do not reflect the
opinions, policies, practices, thoughts, wisps of ideas, etc. of my
employer.  They have no idea I am even responding to this message, so
don't construe the merest thing about them from what I am writing.

  >   Failing this, backups over fiber?
  >   
  >   Regards
  >   
  >   Simon Weaver
  >   3rd Line Technical Support
  >   Windows Domain Administrator
  >   
  >   EADS Astrium Limited, B23AA IM (DCS)
  >   Anchorage Road, Portsmouth, PO3 5PU
  >   
  >   Email:  <mailto:Simon.Weaver at Astrium-eads.net>
Simon.Weaver at Astrium-
  >   eads.net
  >   
  >   -----Original Message-----
  >   From: veritas-bu-bounces at mailman.eng.auburn.edu
  >   [mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of
Anas
  >   Kayal
  >   Sent: 10 May 2007 13:17
  >   To: veritas-bu at mailman.eng.auburn.edu
  >   Subject: [Veritas-bu] Exchange Mailbox Backup
  >   
  >   
  >   
  >   Im backing up Exchange 2003 Mailboxes through my LAN. Backup
process
  >   takes
  >   about 10 hours for about 200GB of data. Does anyone know what I
can do
  >   to
  >   drop it down.
  >   
  >   
  >   
  >   Anas

Mark Hickey
Technical Consultant
Storage Management
HITACHI DATA SYSTEMS
Northeast Region
P 617-395-8568/M 781-254-6441
mark.hickey at hds.com