Unintended consequences of disk to disk back up.
Recently a number of our clients have been told that they can't get any more power into their data centers. After asking some questions, I found that a number of them have changed from tape backups to disk to disk back up. They use tape for archiving.
As these clients now realize the Disk to Disk solutions were great on paper, but the extra disk and the extra cooling required for the spinning media caught up with them on the power side of their infrastructure.
Free Unlimited Power is not available to everyone yet, and so tape may remain a good answer for companies that do not have an unlimited power supply available to them for some time into the future.
I wonder when we will see a whitepaper from EMC or NetApp discussing power consumption of Disk to Disk back up as compared with Tape backup?