mountmgr.sys: For loop-mounted devices, use the backing file

Alexandre Julliard julliard at
Tue Aug 21 04:49:49 CDT 2012

Alexandre Goujon <ale.goujon at> writes:

> As part of their copy protection, some games use some ioctl's to check some physical attributes.
> Unfortunately, when using the loop device, some ioctl fail (like IOCTL_SCSI_GET_ADDRESS).
> A simple fix is to use /path/to/the/file.ISO instead of /dev/loopX.

Several places depend on this being a device. Besides, failing to get
the SCSI address of a loop mount seems like correct behavior to me.

Alexandre Julliard
julliard at

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