4/26/2004
National
Archives and Records Administration
16
System Design Drivers
•Insure system
integrity
–Establish security and
accommodation of restoration services to protect records from
alteration, loss or lack of access capability over time
•Manage the evolutionary
nature of the ERA system, particularly
–Changes to Persistent
Preservation approaches
–Upgrades to the general
infrastructure and support technologies used in the system
•Handle expected ERA Record
Holdings
347
131
35.8
25.8
35.8
18.9
10.6
7.8
5.5
3.6
Accumulated Holdings Volume (PB)
79
31
9.69
7.3
9.7
5.7
3.7
3.0
2.4
1.8
Avg. Yearly Distribution Volume (PB)
59
35
10.0
6.9
10.0
4.8
2.9
2.3
1.9
3.6
Avg. Yearly Transfer Volume (PB)
22
18
14
13
14
12
2010
09
08
2007