Jim, Arnaud, Dave

at 13:46 PDT this afternoon h1susb123 (SUS ITMX,ITMY,BS) cpu froze up in the same way as the recent problems with h1sush2b and h1seib1.

we removed h1susb123 from the Dolphin remotely and power cycled the CPU. The IOP model did not show any IRIG-B error so we thought this was a clean recovery. Unfortunately the DACs were not driveable (similar to h1seih23 problem this weekend) and when the models were activated no DAC channels could be driven. We then stopped the user models, restarted the iop model, restarted the user models and now all is well.

The reason for this crash (the 3rd in 3 days) is unknown, investigations are continuing.