david.barker@LIGO.ORG - posted 17:11, Monday 24 October 2016 (30825)
fw0 restart caused fw1 restart on Saturday 22nd October
Here is the sequence of events which happened in the 18:23 minute PDT Sat 22 October
| 18:23:10 - 18:23:24 | h1fw0 asked for data retransmissions |
| 18:23:24 | h1fw0 stopped running |
| 18:23:26 - 18:23:36 | h1fw1 asked for data retransmissions |
| 18:23:36 | h1fw1 stopped running |
Having both frame writers down meant we lost three full frames for the GPS times 1161220928, 1161220992, 1161221056
Clearly fixing the retransmission errors will become a higher priority if they are cascaded like this and not random as they have been in the past. Our third frame writer h1fw2 did not crash and could have been used to fill in the gap if it were to be connected to LDAS.