LONGTEN01 media unrecognised

DVDinfo shows

                  Media Information                            

Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID LONGTEN 001
Format Capacity Blank Disc
Book Type DVD-R
Media Type DVD-R
Manufacturer Rated Speed 4.0x 5540KBps
Write Strategy Speed 4.0x 5540KBps
2x Speed OPC beta 0B
2x Speed OPC power 0F
2x Write Strategy field 1 12 66 66 80
2x Write Strategy field 2 88 80 00 00 00 00
4x Speed OPC beta 01
4x Speed OPC power 1B
4x Write Strategy field 1 0B 0F 08 08
4x Write Strategy field 2 55 09 10 0B
4x Write Strategy field 3 80 88 80 88
4x Speed OPC beta multi-pulse 06
4x Speed OPC power multi-pulse 1C
4x Write Strategy field 4 13 A8 88 65
4x Write Strategy field 5 98 9A 88 80 00 00
4x Write Strategy field 6 00 00 00 00 00
Data area starting sector 30000h
Linear Density 0.267um/bit
Track Density 0.74um/track
Number of Layers 1

                       Complete Media Code                           

00000000 00 6C 00 00 01 40 C1 FD 9E D8 52 00 02 F7 0E 0B .l…@…R…
00000010 77 88 70 00 03 4C 4F 4E 47 54 45 00 04 4E 20 30 w.p…LONGTE…N 0
00000020 30 31 00 00 05 AA A2 22 22 20 01 00 06 0B 0F 12 01…"" …

but I’m only able to record at 2.4x with Nero
What can I do to use it at full rated speed?

Have you flashed the BENQ 1620 to B79P? This will increase speed from 2.4x to 4x.

Sorry, I forgot to mention I have the 822A and it is flashed with the most recent firmware B7KC.

The Longten 001 IS supported media for BenQ, but it is market “low priority” for support. That media is in the category of “SupaCheap -R” media.
There is rumor of unofficial cross-flash method for DL firmware that will work on the 822 drive. I do not have the details on the method to upgrade this drive, but the Longten 001 is supported at 4x with the newer firmwares.
Personally, I would ignore the firmware trick and just purchase no more Longten after it is used up. Let’s hunt up the compatible media list for your current firmware.
Does anybody have this list?

Well, if anybody knows how to trick with the drive for full 4x speed, I would be interested. I’ve got a bunch of these supacheap and want to get rid as fast as possible.

You can find the dw822a supported media list on BenQ’s FTP server

I checked the list and Longten01 DVD-R 4x is not supported, danielwritesback is correct that if you check the media support for the dw800a dual format firmware Longten 01 is supported at 4x

I suggest a visit to here and you should find what you need to try a cross flash.

Is it safe to flash the DW800a firmware into the DW822a?
Can I flash it back to 822 proprietary firmware?

I’d research that first because I couldn’t with certainty say, no doubt someone in this forum has already tried it so a search should turn up something.

I have found that the Longten 001 media does not work well in any of my settop players. It is OK for computer data storage, as it will read back without errors in all of my computer DVD drives, so I just use 'em for that purpose, never for movies.

Given the information, one would have to say: If your Longton 001 media is currently working in your set top player, then do not re-flash your drive.

No, I’m distributing weather charts on DVDs. So it is actually data, not movies.

try flashing to b3jc firmware and see if you get 4x. b3kc has only been show max speed of 2.4x with the 8x dvd-r media I have been using. b3jc shows speed fine

Already had b3jcy-2 and it was 2.4x as well.