Shweta,
I am backing up to Tape, HP Ultrium 3-SCSI.
I have reviewed those documents, as well as several others prior to posting my request.
Backing up files on the named server is very fast and efficient. It lags when backing up Microsoft Exchange Mailboxes. Do not give me the related article, etc about how backing up of Microsoft Exchange Mailboxes is very slow, etc etc. Read all the articles. This JUST started 2 weeks ago (read in prior posting), prior to this lag, the backup speed was much quicker and very efficient. 6-7 hours compared to 20-22 for the most recent backup (Last night)