Description and scope of the service

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

COS definitions

• 1 default (no resources)
• 0123 GridKa, 1 copy, size < ? GB
• 1102 GHI
• 1103 GHI
• 1104 GHI Metadata
• 1205 Medium, 2 Copies, Size < 500 GB (Physical < 640 GB)
• 1204 Large, 2 Copies, Size < 2000 GB (Physical < 8000 GB)
• 1206 BioQuant, 2 copies, size < 10 GB (physical < 12 GB)
• 1302 Unknown
• 1303