H1 had lost lock at 06:54 UTC (after 56:57 locked!) from an ETMX glitch. It later called for assistance at 09:53 UTC because it was unable to lock DRMI quick enough after having run an initial alignment. On the next attempt, PRMI was able to lock almost immediately, and I touched up PRM pitch alignment to make buildups look as good as possible while MICH ASC was running and before PRMI ASC offloaded. That seemed to be all it needed as DRMI locked very quickly after that.
I needed to fix a typo in LOWNOISE_ASC related to new SRC ASC offsets (alog86422) that caused a channel connection error when we got there, and accept these offsets in SDF (screenshot).
H1 returned to observing at 11:33 UTC.
This typo must have been some copy-paste error I made. Looking at the code now, it does not turn the offsets on, so I must have made a mistake in the ezca.switch command that Ryan undid (sorry!). The SDF diff was accepting that the offsets were OFF instead of ON (see this alog where I had accepted them ON). I want to clarify that the SRC1 offsets were OFF for this subsequent lock. I will make sure the error is fixed during maintenance today.
Fixed. We will have an SDF diff again when we relock to properly engage the offset.