pmount appears to just be following the information given by (presumably) hal about the device. So pmount is not at fault here, it is being told by other parts of the system that the drive is not removable.
** Changed in: pmount (Ubuntu) Sourcepackagename: pmount => hal -- pmount sees a microdrive as non-removable, so won't mount it. https://launchpad.net/bugs/50226 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
