7

I can't find a reference to the "M" attribute shown in the image. File properties details

enter image description here

Moab
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drlambert100
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1 Answers1

4

This appears to be FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS (0x400000). It is settable only by the OS (in this case by the OneDrive filter driver).

It slightly modifies the meaning of the 'O' (Offline) attribute, by indicating that the offline file will be automatically made available as soon as its data is accessed, without having to explicitly request this via FSCTL_RECALL_FILE.

(Windows has had the concept of "offline" files since ~2000, so the 'O' attribute used to mean that the file was moved to something like an automated tape-storage library, and had to be manually recalled before use.)

grawity
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