Unique Disc Identifier : [DVD+R-DL:MKM-001-000]
Disc & Book Type : [DVD+R DL] - [Not Available]
Manufacturer Name : [Mitsubishi Kagaku Media]
Manufacturer ID : [MKM]
Media Type ID : [001]
Product Revision : [Not Specified]
Blank Disc Capacity : [4,173,824 Sectors = 8.55 GB (7.96 GiB)]
Recording Speeds : []
** INFO : Drive = BENQ DVD DD DW1640 [FW BSJB]
** INFO : Write Capabilities = DVD+R DVD+R-DL DVD+RW
** INFO : Write Capabilities = DVD-R DVD-RW
** INFO : Disc = [DVD+R-DL:MKM-001-000]
** INFO : Reference Speed : 1x DVD = 1385 kBps
** INFO : An Writeable Disc Is Recommended For Accurate Results
** INFO : Write Speeds (Supported By This Drive On This Disc) Listed Below
** INFO : GET PERFORMANCE Write Speed Descriptor(s)
Descriptor #1 = 11080 kBps ( 8.00x) - [CLV/Non-Pure CAV]
Descriptor #2 = 5540 kBps ( 4.00x) - [CLV/Non-Pure CAV]
Descriptor #3 = 3324 kBps ( 2.40x) - [CLV/Non-Pure CAV]
** INFO : MODE SENSE Write Speed Descriptor(s) [Legacy Command]
** WARNING : MODE SENSE Is Obsolete And Not Always Properly Supported
Descriptor #1 = 11080 kBps ( 8.00x) - [CLV/Non-Pure CAV]
Descriptor #2 = 5540 kBps ( 4.00x) - [CLV/Non-Pure CAV]
Descriptor #3 = 3324 kBps ( 2.40x) - [CLV/Non-Pure CAV]
There is no problem with the firmware. If you don't get an 8X option then you need to look elsewhere. BSHB also has the same write strat.