The /trend file system (a SSD RAID) became corrupted yesterday evening at 22:59 PST.  This prevented raw trend data from being written and caused the daqd process to repeatedly restart all night.  

The file system has been repaired and the trend writer started again.

The old raw minute trend data was being copied to h1fw0 at the time, and was close to half done.  The copy operation will be cleaned up and resumed.