Никогда не думал что столкнусь с подобной проблемой...
mount -o loop /tmp/dwn/rfdsaw.mdf /tmp/iso/
mount: вы должны указать тип файловой системы
[193860.755983] EXT4-fs (loop0): VFS: Can't find ext4 filesystem
[193860.759084] EXT4-fs (loop0): VFS: Can't find ext4 filesystem
[193860.770624] FAT: bogus number of FAT structure
[193860.770629] VFS: Can't find a valid FAT filesystem on dev loop0.
[193860.776087] FAT: bogus number of FAT structure
[193860.776091] VFS: Can't find a valid FAT filesystem on dev loop0.
[193860.797665] ISOFS: Unable to identify CD-ROM format.
[193860.807379] UDF-fs: No anchor found
[193860.807383] UDF-fs: Rescanning with blocksize 2048
[193860.807585] UDF-fs: No anchor found
[193860.807587] UDF-fs: No partition found (1)
Как все-таки смонтировать?