What's New?
One popular feature, a disk for D2D2T (disk-to-disk-to-tape) operations, is showing up in the newest tape autoloaders. With D2D2T, you use a disk as an intermediate step in tiered storage. To your backup software, a disk is no different than tape. However, backing up or transferring to a disk is much faster than doing the same to tape. You'll have the time, between backups, to get the data from the disk to tape. And you can do this without adding load to your production servers.
Another advantage of D2D2T is that you can restore your most recent backup from disk much faster than you can from tape. But if you're going to rely on disk to extend your backup window, factor in the expandability of that disk to account for your five-year data growth.
The real key to purchasing a tape autoloader is understanding your current needs and considering your future needs. An inaccurate projection leads to either an anemic autoloader or money wasted on a unit you will never fully utilize.
Steven J. Schuchart Jr. covers storage and servers for NETWORK COMPUTING. Write to him at
sschuchart@ nwc.com.
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