I've got data DVD disc, 
	
	
	
		
But when I try to mount it as UDF, I get an error.
	
	
	
		
What can it be? And how to mitigate the problem?
				
			
		Code:
	
	# dvd+rw-mediainfo /dev/cd0
INQUIRY:                [Optiarc ][DVD RW AD-7200S ][1.0A]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         11h, DVD-R Sequential
 Media ID:              CMC MAG. AM3
 Current Write Speed:   16.0x1385=22160KB/s
 Write Speed #0:        16.0x1385=22160KB/s
 Write Speed #1:        12.0x1385=16620KB/s
 Write Speed #2:        8.0x1385=11080KB/s
 Write Speed #3:        6.0x1385=8310KB/s
 Write Speed #4:        4.0x1385=5540KB/s
GET [CURRENT] PERFORMANCE:
 Write Performance:     6.6x1385=9141KB/s@0 -> 16.0x1385=22160KB/s@2297888
 Speed Descriptor#0:    03/2297888 R@16.0x1385=22160KB/s W@16.0x1385=22160KB/s
 Speed Descriptor#1:    03/2297888 R@12.0x1385=16620KB/s W@12.0x1385=16620KB/s
 Speed Descriptor#2:    00/2297888 R@8.0x1385=11080KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#3:    00/2297888 R@8.0x1385=11080KB/s W@6.0x1385=8310KB/s
 Speed Descriptor#4:    00/2297888 R@5.0x1385=6925KB/s W@4.0x1385=5540KB/s
READ DVD STRUCTURE[#10h]:
 Media Book Type:       00h, DVD-ROM book [revision 0]
 Legacy lead-out at:    2298496*2KB=4707319808
READ DVD STRUCTURE[#0h]:
 Media Book Type:       25h, DVD-R book [revision 5]
 Last border-out at:    2045*2KB=4188160
READ DISC INFORMATION:
 Disc status:           appendable
 Number of Sessions:    2
 State of Last Session: empty
 "Next" Track:          2
 Number of Tracks:      2
READ TRACK INFORMATION[#1]:
 Track State:           complete incremental
 Track Start Address:   0*2KB
 Free Blocks:           0*2KB
 Track Size:            266448*2KB
 Last Recorded Address: 266447*2KB
READ TRACK INFORMATION[#2]:
 Track State:           invisible incremental
 Track Start Address:   295136*2KB
 Next Writable Address: 295136*2KB
 Free Blocks:           2002752*2KB
 Track Size:            2002752*2KB
FABRICATED TOC:
 Track#1  :             14@0
 Track#AA :             14@266448
 Multi-session Info:    #1@0
READ CAPACITY:          266448*2048=545685504
		Code:
	
	# mount -t udf /dev/cd0 /mnt/yury
mount_udf: /dev/cd0: Invalid argument
# dmesg | tail
Unsupported partition map: *UDF Virtual Partition 
			    