Microsoft Office Tutorials and References
In Depth Information
Which media to use?
Disk (SATA, eSATA, USB hard
Pro : Low costs for large amounts of storage space.
Con : Not very mobile for offsite. Disks are often
internal to the backup server. If you have an external
drive, DPM does not work well with these. DPM
does not support the use of USB drives, however
using third-party software it is possible to simulate
a tape library to DPM which utilizes USB disks. This
will be covered later in this topic.
Tape (Usually a single tape unit
or robotic tape library and tapes
that you rotate.)
Pro : Good for offsite and archiving.
Cons : Cost can be high on the units and purchase
of tape inventory. Storage limits on tapes. Some
administrators will require training on tape systems.
There are many tape formats (LTO, DLT, DAT/
DDS, SAIT/AIT, and Travan) the one you choose to
use today may not be around tomorrow.
Pro : Relatively low cost. Fast back ups with eSATA.
DAS (Direct Attached Storage)
Con : Not mobile for offsite backup.
SAN (Storage Area Network)
and iSCSI NAS
Pro : Very fast. These systems use fiber optics.
Recommended for enterprise environments with
large amounts of data to back up.
Con : High cost of equipment. You will need to train
most administrators on these type of systems. This is
not mobile for offsite backup as well.
Pro : Great alternative to tapes or moving drives
offsite. Unlimited backup capacities available.
Cloud (An offsite vendor's data
Con : Monthly cost required. The more data you
have the more you will pay. Cloud storage has high
bandwidth usage possibly causing speeds on your
network to diminish. Dependant on having internet
Overall you need to be aware of how much your organization is willing to spend
on media for the backup system. When you choose the media you will use for your
backup solution the following should be considered:
• The cost of the media as well as training
• On-going administration