hidden:Description and scope of the service

BWDA Storage Classes

Name	Max avg. access time	Storage technology	# of copies	Price TB/p.a.	Comment
Class 0	less than10 seconds	disk only	1	325 Euro	high available RAID6/E2EDI
Class 1 - Standard	less than 10 hours	tape only	2	122 Euro*1	regular archive storage comparable to Microsoft Azure and Amazon AWS
Class 2 - Premium	less than 10 minutes	disk cache in front of tape	2	150 Euro*2	disk buffer cache in front of tape large enough to hold a working set of the data to guarantee access times
Class 3 - Premium Plus	less than 10 hours	tape only	3	150 Euro*2	super safe storage. targeting 20 nines. Third location outside computer centre.

^*1 not yet official pending ALWR decision

^*2 indicative. Actual price depends on required cache size and media costs