Yesterday's h1iscey kernel panic was the second in one week, but I seem to remember we went a long period prior to this without these crashes. This prompted me to search the alog and my records to find the freqency of these types of crashes.
| Date | Frontend | global DAQ error |
| Sep 25 | h1lsc0 | yes |
| Sep 28 | h1iscex | yes |
| Oct 06 | h1lsc0 | no |
| Oct 06 | h1susey | no |
| Nov 01 | h1seih16 | no |
| Nov 04 | h1seih16 | yes |
| Jun 11 | h1sush2a | no |
| Jun 17 | h1iscey | yes |
Some observations:
Crashes appear to happen in pairs?
50% of crashes cause DAQ errors on associated systems (same network port on h1dc0), rest are local only.
We went for 7 months before the recent pair of crashes.