Power Server
VEPROs power servers are with dual processor equipped high-speed machines, which are placed in a 19" cabinet and configured for professional use. Provided with large-volume RAID 5 HDUs (SAN), the VEPRO power server can be expanded up modular to 128 terabyte (status: 1st May 2004). Thus, storage space does not need to be forecasted for up to 10 years, but can be ordered as required in the years to come.
In the process, you remain flexible in your decision of wanting:
(a) to expand the ONLINE hard disk memory with inexpensive and large volume RAID 5 memories
or
(b) no ONLINE expansion as the user frequency of “old” patient data is so low that the data can be retrieved from the long-time DVD archive at any time when required
or
(c) to use a NEARLINE expansion by jukebox, provided this is technologically or economically sensible.
Long-time memory
Today, DVDs are considered reliable, fast and standardized long-time memory media, which also applies for the CD, which is limited by capacity. Because of the technological development of mass memory media, the media migrations on more current data media will soon be necessary. However, this is ensured only if standardized media were used for long-term archiving in the PACS.
Attention: Tape drives or volume robots are among the proprietary drives that make a later data migration on current media nearly impossible and unprofitable. They do not fulfill the legal requirements for non-erasable studies from data in a PACS and their long-term stability for a minimum of 30 years. Even in the traditional use of the data storage, tape-based solutions are replaced more frequently by less-expensive, faster and standardized systems.
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