by Mark Schoonover & Mike Hiraga
Introduction
I had requirements to develop a multi-terabyte disk to disk backup system. I’ve used the usual backup to tape options, but once my company got past the 1 TB threshold, it was too demanding for tape. Some of the problems going to tape were:
1.Tape Libraries, big and expensive.
2.Backup window too long.
3.Restoration took a very long time.
4.Storage, and inventory of tapes too time consuming.
5.Very difficult for offsite storage with large amounts of data.
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