[CentOS] strategy/technology to backup 20TB or more user's data

Hi Friends,

I am currently using Samba on Centos 4.4 as a domain member of AD 2003 with each user having a quota of 2GB(no of users is around 2,000). Now the management wants to increase the quota to 10GB with this there will be more than 20TB of data to be backup weekly which will take lots of hours. Currently Veritas backup software is used to backup data on tapes.

There is a concept of snapshots of Samba with LVM where snapshots of samba are taken at the given interval but so far haven't found any good article or how-to on that and also what is the experience of users using this technology and also what other technologies are being to handle TBs of data.

Kindly let me know if you need any further inputs

Thanks & Regards

Ankush