Data Recovery Article
Options for Tape Backup: LTO, DDS or DLT
By Doug Owens
Unfortunately, DDS hasn't really done much in terms of growth since the DDS-4 series, and
I haven't heard if there will be anything else from that direction, so I would likely steer clear
of that avenue. DLT has the potential (with compression) of storing up to 80 GB of data on a
single tape, SDLT (Super-DLT) now has the compressed capacity of up to 600GB, and LTO-
3 comes in at an impressive compressed capacity of 800 GB.
Also, DLT/SDLT/LTO have
the speed that is required to get the large amounts of data backed up in a timely fashion. If
you aren't looking at libraries, then I wouldn't consider going with a solution that requires
more than one tape to store the data I need to back up.
Backups tend not to complete when
a second tape is required to complete the task, and nobody is available to swap media. As
far as recommending one of the formats you mentioned above, I would say that either of the
DLT/SDLT/LTO would be a good direction to look in.