What is considered an acceptable backup data transfer rate, given today's solutions, measured in GB/hr per drive?To further define the parameters, say I had 10 LTO 1 drives in a robotic library, backing up a 10TB FC SAN (80% NAS hosting W2K data and 20% server hosts, MS and Notes apps.). No UNIX. Factor in a weekly full for all 10TB (1.43TB per night avg.) and a data change rate of 20% (300GB of incremental per night avg.).
2. Tweaking multiplexing (how many backups go to a given drive at once).
3. Adding disk to the mix to deal with low bandwidth networks.
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This was first published in November 2003