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Reports until 17:01, Thursday 27 June 2013
H1 DAQ
james.batch@LIGO.ORG - posted 17:01, Thursday 27 June 2013 (6908)
Reconfigure h1fw0 raw minute data
Cyrus, Dave, Jim

Attached a new SSD RAID to h1fw0.  This RAID is to be used for storage of raw minute data that was formerly written to the SATAboy hard drive array in LDAS.  Reconfigured the h1fw0 daqd to write raw minute data to /trend/minute_raw instead of /frames/trend/minute_raw.  Reconfigured h1nds0 to read raw minute data from both /frames/trend/minute_raw and /trend/minute_raw.  The raw minute data in /frames/trend/minute_raw is now in two subdirectories of /frames/trend/minute_raw, and is considered archive data while still being available for viewing via h1nds0.

Note that frame files written to /frames/full, /frames/trend/minute, and /frames/trend/second are not affected by this change.

The benefit of this change is a remarkable decrease in the amount of time required to write raw minute data, allowing it to be written much more often.  Hopefully this will help make h1fw0 more stable, as the daqd process was having difficulty writing files in the time allocated for the task.  The downside is the raw minute data will have to be copied to the archive as the SSD RAID fills up, which is a maintenance task to be performed a few times per year.
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