http://bugs.winehq.org/show_bug.cgi?id=58529
--- Comment #11 from Hans Leidekker hans@meelstraat.net --- (In reply to Ken Sharp from comment #10)
(In reply to Hans Leidekker from comment #4)
I suspect it will fail in the same way on Windows if the chosen drive happens to be read-only.
In Win 10 it does indeed fail, but the installer actually tells you that it cannot write to the drive, allows you to cancel and claims to rollback, though it leaves c:\NotesSQL behind, which it always chooses c: (or maybe %systemdrive%) for.
How did you test this? Note that my comparison wasn't entirely accurate because the z: drive isn't actually read-only (and shouldn't be reported as read-only because certain parts of the tree will be writable). So to properly test this on Windows the drive should be writable but creating a folder in the root should fail with an access denied error.