Backing Up with Tape Drives: Security Is What Counts
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Jürgen Heyer
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Cost Comparison: How Many Gigabytes For Your Money?
The cheapest tape drive is not automatically the best-value archiving concept. The table gives an overview for 1 GB of data storage.
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| Up To 50 GB Capacity | |||||
|---|---|---|---|---|---|
| Manufacturer | Dell Powervault | Onstream | Seagate | Tandberg | Tandberg |
| Product | 110T DLT VS 80 | ADR2 60Si | tapestor DAT 40 | DLT VS 80 | SLR100 |
| Time to fill the media (in test lab) | 254 minutes | 163 minutes | 142 minutes | 254 minutes | 176 minutes |
| Time for 200 GByte | 20:49 hours | 17:16 hours | 23:27 hours | 20:29 hours | 11:33 hours |
| Measured transfer rate in test lab *) | 88% | 77% | 86% | 88% | 95% |
| Tape price per gigabyte | $2.09 | $2.16 | $0.95 | $2.48 | $2.07 |
| More than 50 GB Capacity | |||||
| Manufacturer | ExaByte | HP | Onstream | Seagate | Tandberg |
| Product | VXA-2 | SDLT 320 | ADR2 120Si | Viper 200 | SDLT 320 |
| Time to fill the media (in test lab) | 258 minutes | 203 minutes | 329 minutes | 154 minutes | 203 minutes |
| Time for 200 GByte | 10:07 hours | 4:09 hours | 17:27 hours | 4:51 hours | 4:09 hours |
| Measured transfer rate in test lab *) | 86% | 82% | 76% | 68% | 82% |
| Tape price per gigabyte | $1.11 | $0.94 | $1.58 | $0.89 | $1.34 |
*) Manufacturer's specification is 100 percent.
Evaluation
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