Note that the mode you see is just a string representation of a bitfield
enum that hides in the
Attributes property. You can figure out what the individual letters mean by simply showing both side by side:
PS> gci|select mode,attributes -u Mode Attributes ---- ---------- d----- Directory d-r--- ReadOnly, Directory d----l Directory, ReparsePoint -a---- Archive
In any case, the full list is:
d - Directory a - Archive r - Read-only h - Hidden s - System l - Reparse point, symlink, etc.