Agnello George wrote:
The requirement fro backup is not primarily for HDD failure , but human error failure . In case one of our user ( eg: the COO with huge mailbox size has delete all his certain very important mails, and he want to recover them , the contacts us as we are supposed to maintain his mail backup for a week, and we should restore his backup immediately ) this the main requirement for the backup and that too on the same server different partition .
Have you considered using a snapshot approach? By that, I mean one which uses hard links to create the "backup", and as files get added/ modified, the data are copied, and links are created. Usually, one has a snapshot directory with something like a daily snapshot, and 24 hourly ones, something like that.
Mike