Measure the DM tier's reachability instead of asking about it - #706
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HOST-6 went on the page yesterday because the durable-copy design rested on /gdata/dm/2BM being readable from tomdet and nobody had checked. The check turned out to be three SSH commands over the hop CORA's scan probe already uses, so it did not need to cost the beamline anything. It is readable. Month directories run back to 2020-11, an experiment folder carries the documented data/analysis/system split, and the GUP-number glob resolves to exactly one directory, which is the part the design actually depends on: it means a reader can find the durable copy without being told the PI surname the folder name carries. Record it beside the tier account and drop the question. The earlier reading behind HOST-2 covered arcturus, where no tier is visible, so this is a different host rather than a re-test.
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Closes HOST-6, one day after #702 opened it.
Why it did not need to be a question
HOST-6 asked whether
/gdata/dm/2BMis readable fromtomdet, because the durable-copy design rests on it and nobody had checked. The check turned out to be three read-only SSH commands over the hop CORA's scan probe already uses, so it cost the beamline nothing.What was measured, 2026-08-21
2020-11{data,analysis,system}split2026-08/*-1015116resolves to exactly one directoryThe third is the one the design depends on. The experiment folder is named after the PI, and CORA deliberately holds no surname, so the durable copy has to be found from the proposal number and filename alone. That now has a measured baseline rather than an assumption.
The earlier reading behind HOST-2 covered
arcturus, where no tier is visible. This is a different host, not a re-test.What changed
The facts go beside the tier account in
operations.md; the HOST-6 row comes off the questions page, which by its own convention carries only open items.Docs only.
make docs-buildpasses with--strict.🤖 Generated with Claude Code