I've definite seen loctite and very tightly screwed screws, but never glued in. I checked a few more servers randomly and didn't find any glued, including 2.5 and 3.5, SAS, NVME and SATA.My R440s had the blue loctite on the screws for the SAS HDDs. But they were screwed so tight, ended up stripping a few screws. Maybe someone just used regular loctite by mistake?
EDIT - these are on Dell 14th and 15th generation servers.
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