$ dvd+rw-mediainfo /dev/hdd
INQUIRY:                [_NEC    ][DVD_RW ND-3550A ][1.05]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         1Bh, DVD+R
 Media ID:              RITEK/R04
 Current Write Speed:   6.1x1385=8467KB/s
 Write Speed #0:        6.1x1385=8467KB/s
 Write Speed #1:        5.1x1385=7056KB/s
 Write Speed #2:        4.1x1385=5645KB/s
 Write Speed #3:        3.1x1385=4234KB/s
 Write Speed #4:        2.0x1385=2822KB/s
 Write Speed #5:        1.0x1385=1411KB/s
GET [CURRENT] PERFORMANCE:
 Write Performance:     6.6x1385=9141KB/s@0 -> 16.0x1385=22160KB/s@2295104
 Speed Descriptor#0:    03/2295104 R@16.0x1385=22160KB/s W@16.0x1385=22160KB/s
 Speed Descriptor#1:    03/2295104 R@12.0x1385=16620KB/s W@12.0x1385=16620KB/s
 Speed Descriptor#2:    00/2295104 R@8.0x1385=11080KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#3:    00/2295104 R@8.0x1385=11080KB/s W@6.0x1385=8310KB/s
 Speed Descriptor#4:    00/2295104 R@5.0x1385=6925KB/s W@4.0x1385=5540KB/s
READ DISC INFORMATION:
 Disc status:           blank
 Number of Sessions:    1
 State of Last Session: empty
 "Next" Track:          1
 Number of Tracks:      1
READ TRACK INFORMATION[#1]:
 Track State:           blank
 Track Start Address:   0*2KB
 Next Writable Address: 0*2KB
 Free Blocks:           2295104*2KB
 Track Size:            2295104*2KB
READ CAPACITY:          0*2048=0