Disk Backup v Tape Backup

[Robert Atkinson]

For those of you interested, we completed the SAN disk upgrade, and thanks to lots of pre-planning, almost everything went perfectly.

The one thing that did amaze me was the disk-to-disk copy speed. We managed to backup the system disk in around 20 minutes to SDLT, but to a 36GB 10k SCSI attached disk, it took 2 hours!

I was expecting it to be slower, but not 6 times slower!

A word of warning to anyone attempting anything similar.....always go for tape if speed is an issue.

Rob.

[Uwe Zessin]

Well, a tape just moves forward - a disk's head has to move all over the disk to write data, update meta-data and so on. A tape drive can compress data - a disk drive does not (at least I have never seen it).