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(fdutils.info)Identifying disks

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What to do if you get an unidentified floppy disk
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     dd if=/dev/fd0 of=/tmp/foo count=1
             # If it works:
     getfdprm                # This will report what geometry the disk has
     file /tmp/foo           # This may indicate the type of file system
     mdir a:                 # Check for an MS-DOS file system
     tar tvf /dev/fd0        # Check for a tar archive
     cpio -itv < /dev/fd0    # Check for a cpio archive
     e2fsck /dev/fd0         # Check for an "ext2" file system
             # If it doesn't work:
             # Try the above dd command using various /dev/fd0* devices