Description and scope of the service
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The service for long time storage 'BWDA' offers the following storage classes:
| Name | Max AVG. Access Time | Storage Location | # of copies | physical separation | comment |
|---|---|---|---|---|---|
| Class 1 | <10 seconds | disk only | 1 | na | high available RAID6/E2EDI |
| Class 2 | <10 minutes | disk cache in front of tape | 1 | na | disk buffer cache in front of tape large enough to hold a working set of the data to guarantee access times |
| Class 3 | <10 hours | tape only | 2 | 2 locations | regular archive storage comparable to azure, aws |
| Class 4 | <10 hours | tape only | 2 | 2 locations | super safe storage. targeting 20 nines. Second location with different technology |
