Reports until 07:57, Tuesday 31 January 2017
H1 CDS
james.batch@LIGO.ORG - posted 07:57, Tuesday 31 January 2017 - last comment - 08:16, Tuesday 31 January 2017(33750)
The h1boot computer crashed, rebooting 
The h1boot computer crashed with a divide by zero error, causing several front end computers to complain about "nfs: serverh1boot not responding, still trying".  Symptoms in the control room were first noticed that the StripTool plots flatlined.  An FSCK is being performed automatically.
Comments related to this report
james.batch@LIGO.ORG - 08:16, Tuesday 31 January 2017 (33753)
Link 

The h1boot computer is back, no front end processes seem to have been affected.  Since h1boot is the dolphin master for dolphin-interconnected computers, the front end computers all noted the absence of the master with the message 

"DXH Adapter 0: ma_dxAllocPhysMap - dx_user_connect failed - status=0xffffffff"

The CDS overview screen was completely green, but that doesn't really mean much, as the EPICS values were frozen at their last known (good) values.

Approximate time of h1boot crash is 6:42 PST according to network monitors.