There are many kinds of devices. A few of the most common are listed in the following table.
|
Device type |
Approximate Transfer rate 2:1 (compressed data) |
Maximum Capacity (compressed data) |
|---|---|---|
|
DDS-4 |
6.0 MB/seconds=21.6 GB/hour |
40 GB |
|
AIT-2 |
12.0 MB/seconds=43.2 GB/hour |
100 GB |
|
AIT-3 |
31.2 MB/seconds=112.3 GB/hour |
260 GB |
|
DLT 7000 |
10.0 MB/seconds=36.0 GB/hour |
70 GB |
|
DLT 8000 |
12.0 MB/seconds=43.2 GB/hour |
80 GB |
|
Super DLT |
24.0 MB/seconds=86.4 GB/hour |
220 GB |
|
Mammoth-2 |
24.0 MB/seconds=86.4 GB/hour |
160 GB |
|
Ultrium (LTO) |
30.0 MB/seconds=108.0 GB/hour |
200 GB |
|
IBM 9890 |
20.0 MB/seconds=72.0 GB/hour |
40 GB |
|
IBM 3590E |
15.0 MB/seconds=54.0 GB/hour |
60 GB |
Even though a single device may not be able to give the data transfer rate of 200 GB per hour set by our example, using multiple media devices should be able to achieve this aggregate transfer rate. For example, if you are using Ultrium tape drives, you need 2 tape drives to achieve 200 GB per hour, or 5 DLT 8000 drives to achieve the same throughput.
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