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problem with dae in benq dvp-1648a dvdrom

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problem with dae in benq dvp-1648a dvdrom

Postby seee on Wed Jan 29, 2003 8:28 pm

Recently i buy a BENQ DVP-1648A -but it has performed very bad in DAE (nero cdspeed). In the test the curve start in 21x and when its is near to 32x , slow down to 24x ,and again close to 32x slow down to 28x ...............i Think, its had problems to read the disc at this speeds (i make the test with diferents pressed an cdr dics). i dont know if it is a defective unit, or a problem in all units . in data the drive work great!!!, why this sucks only in DAE?
The firmware is 1.07 and my system is:

Asus A7V
Athlon 800@824mhz
256mb
Creative geforce2 gts 32MB
Via 4 in 1 4.38v
Quantum Fireball plus Lm 20GB ATA 66 master in primary VIA IDE
Benq dvd-1648a master in secondary VIA IDE
Plextor 12x10x32 CDRW master in primary PROMISE IDE ATA 100
Windows 98S

ANYBODY HAVE A SIMILAR PROBLEM?

THANKS
seee
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DAE

Postby vbl117 on Thu Jan 30, 2003 6:06 am

DAE and DATA transfert speed are two different things . For example most of 50X CD-ROM drives can only extract audio at 8X CLV ( constant speed ) .
Some DVD-ROM drives can only perform DAE at 16X or lower . Lite-ON DVD-ROM drives are the fastest DVD-ROM drives for DAE ( 48X Max ) .

Nevertheless , in the review posted in cdrlabs your drive reachs 41X DAE Max .

http://www.cdrlabs.com/reviews/index.ph ... erformance

It is normal for your drive to start to 21X DAE if his DAE Max is twice this amount ( 2 * 21 = 42X ) .

Have you enabled DMA for your drive ? ( by the past , PIO mode 4 has given unstable results on DAE tests on my 50X Actima CD-ROM drive ) .
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Postby seee on Thu Jan 30, 2003 10:32 pm

thanks vbl117, dma is enable, the drive is hook lonely in the secondary ide (master)with a ATA 33 ide cable (don´t have a ata 66 cable).

is anybody have the same drive, post yours experiences!!!

thanks
seee
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Postby seee on Thu Jan 30, 2003 10:35 pm

D:\benq.jpg
seee
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Postby dhc014 on Thu Jan 30, 2003 11:16 pm

seee wrote:D:\benq.jpg


LOL! That won't work! Upload it to an online host and link to it there!
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Postby cfitz on Fri Jan 31, 2003 2:06 am

seee wrote:D:\benq.jpg


We have a FAQ now on how to post pictures:

http://www.cdrlabs.com/phpBB/viewtopic.php?t=8826

cfitz
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Postby seee on Sat Feb 01, 2003 9:44 pm

ok........i can´t post pictures....but....can anybody help me?

i want know if my drive is defective or not!

thx
seee
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Postby cfitz on Sun Feb 02, 2003 1:12 am

It doesn't sound like perfect behavior if I follow your description closely. On the other hand, it doesn't sound like dreadful behavior either.

Since the drive uses CAV reading, it should be able to extract the data in a smoothly increasing rate. The behavior you describe leads me to suspect that the drive begins to have some trouble reading the data at the outer edges of the disc (where reading is most difficult due to the higher speed and vibration), and slows down to compensate. Then it speeds up again as it successfully reads data until it runs into problems again at which point it slows again.

This is perfectly normal and proper behavior when a drive runs into trouble reading a disc, and does not indicate that your drive is defective in and of itself. I would try a number of different discs, both pressed and CD-R, to see if it behaves the same for all discs or only on certain harder to read discs. It it does it on every disc, your drive might have a problem. But Benq drives, in my experience, aren't the highest quality, so what you are seeing may be typical.

Make sure that your discs are perfectly clean and free of finger-prints, scratches, etc. If a disc is dirty or damaged then it would obviously cause the drive trouble while reading.

cfitz
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