In Case of Difficulty Accessing PDSF or HPSS

NERSC Systems Status - includes PDSF and HPSS status as well as the the Message of the Day (MOTD) and is maintained 24 hours a day, 7 days a week, by the NERSC Computer Operations & Network Support staff and provides the most up-to-date information on system status.

NERSC Systems Availability Log - includes HPSS and PDSF.
History of down times for all the NERSC systems - updated once a day.  This is a good place to check if you wonder whether PDSF or HPSS was down or up at some time in the past.