The High Performance Storage System (HPSS) consists of new tape libraries with storage capacity of more than 100 petabytes at the NCAR-Wyoming Supercomputing Center (NWSC) and another 15 petabytes of storage at the Mesa Lab in Boulder.
These scalable, robotic systems comprise four StorageTek SL8500 tape libraries with a total of 34,000 cartridge slots. The NWSC system features 26 T10000C tape drives and an I/O rate of 240 MBps. File metadata are maintained in DB2, IBM's real-time database system.
Scheduled preventive maintenance periods are Tuesdays from 7 to 9 a.m. Mountain time.
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HPSS replaced the Mass Storage System (MSS) in April 2011. Files that were stored in MSS when it was decommissioned were moved to HPSS.