* Surface coarse SMART health for USB-bridge drives
USB enclosures that reject ATA pass-through (e.g. Seagate Expansion) are
invisible to pySMART/DeviceList, so the drive shows no SMART at all on the
Controller page. Fall back to smartctl over the SCSI transport, which many
such bridges still answer, to report a coarse PASS/FAIL health plus drive
identity (model/serial/capacity).
The health (-d scsi -H) and identity (-d scsi -i) reads are issued as
separate calls: combining them makes smartctl suppress the health line when
the identity read reports "SMART support is: Unavailable" (which these
bridges do). The entry is marked smart_limited (labelled "(limited)" in both
UIs) so a green PASS is not mistaken for full monitoring — these drives
expose no attributes or temperature, and some bridges report "OK" statically.
* Harden SCSI health fallback (Greptile review)
- _scsi_health: treat any unrecognised status (e.g. "UNKNOWN", "N/A") as
unreadable (None) instead of a false FAIL. Only "OK" -> PASS and "FAIL*"
-> FAIL; anything else omits the drive rather than showing a red FAIL that
contradicts the smart_limited disclaimer.
- get_all_smart_status: isolate the SCSI supplement loop in its own
try/except so an error there cannot discard the pySMART results already
collected.
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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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