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Different max speed on same DVD ????



Hello

Does anyone know why my Pionneer DVR-109 and my HP DVD writer report
different speed for the same 8x DVD ?? 

Pionner reports 4x and 2x speeds whereas HP reports 8x and 4x.

Here's dvd+rw-mediainfo (v 6.1-2) from the pioneer:

$ dvd+rw-mediainfo /dev/hdc
INQUIRY:                [PIONEER ][DVD-RW  DVR-109 ][1.58]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         1Bh, DVD+R
 Media ID:              DT-D03/004
 Current Write Speed:   4.0x1385=5540KB/s
 Write Speed #0:        4.0x1385=5540KB/s
 Write Speed #1:        2.4x1385=3324KB/s
 Speed Descriptor#0:    00/2295103 R@1.0x1385=1385KB/s W@4.0x1385=5540KB/s
 Speed Descriptor#1:    00/2295103 R@1.0x1385=1385KB/s W@2.4x1385=3324KB/s
READ DVD STRUCTURE[#0h]:
 Media Book Type:       A1h, DVD+R book [revision 1]
 Legacy lead-out at:    2295104*2KB=4700372992
READ DISC INFORMATION:
 Disc status:           blank
 Number of Sessions:    1
 State of Last Session: empty
 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


And from the HP drive:

$ dvd+rw-mediainfo /dev/hdc
INQUIRY:                [HL-DT-ST][DVDRRW GWA-4166B][1.03]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         1Bh, DVD+R
 Media ID:              DT-D03/004
 Current Write Speed:   8.0x1385=11080KB/s
 Write Speed #0:        8.0x1385=11080KB/s
 Write Speed #1:        4.0x1385=5540KB/s
 Speed Descriptor#0:    00/359999 R@8.0x1385=11080KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#1:    00/359999 R@8.0x1385=11080KB/s W@4.0x1385=5540KB/s
READ DVD STRUCTURE[#0h]:
 Media Book Type:       A1h, DVD+R book [revision 1]
 Legacy lead-out at:    2295104*2KB=4700372992
READ DISC INFORMATION:
 Disc status:           blank
 Number of Sessions:    1
 State of Last Session: empty
 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

Is my Pioneer drive (again) failing ?

Thanks for any info.



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