CD-R Burning Question

[Arsenic]

What determines how long a particular disc takes to burn.. ?

Meaning this:
I have 1 computer setup: 1.6 P4, 1 gig 2700 DDR, 40 gig / 120 gig 7200, 24/10/32 burner with a HP dvd writer 12 / 10 / 32.
Burning a disc at 24x takes about 5 and half minutes in copy on the fly mode.

My other pc is a 1.8 p4, 512 2700 DDR, 100 gig 7200, 40x 12x 40x burner with a 16x dvd 40x read DVD room drive.
Burning the same disc on that computer takes like 9 minutes at 40x write in copy on the fly mode.

So I am stumped here. Is system memory used alot when computing a time for a burn? I would think the reader + write would make a big impact so I would think system 2 would have been faster.

I tried looking in the DVD burning section but alot of the questions are centered around particular burners and such.

If you could just point in a direction, I have no problem reading..
I also checked out VCDhelp.com, but seemed to come up short.

Any help appreciated, trying to get system 2 to perform correctly.

[CaPPyD]

Hi!

I noticed for both attempts, you stated you were using 'Copy On The Fly' I am going to make an assumption here and assume that you are copying from one CD directly to another. There are many things going on inside your computer that could influence the speed of the copy.

The main thing to consider here is whether or not your two drives are on the same IDE Channel. If they are using the same channel, then you are getting an IDE Roadblock, where two drives are using the same data path and it is slowing everything down. Essentially the data is coming out of one drive, travelling down the IDE cable into the motherboard and then it has to travel back up the same cable to the CDRW drive. It's kinda like driving through road construction with the two guys holding the signs, you can only go one way, and only when they say you can go.

Hope this helps, :D

[Arsenic]

Yah I setup the PC with having main HD + DVD on one IDE and 2nd HD + writer on the other. So it isn't the setup slowing the data down.
Any other thoughts why similar PCs would take dramatically longer given the same media, same file size but different results?

[mustaneekeri]

I think ur reader (DVD) drive is not capable of readin CDs so fast that they could be burned at 40x on the fly. So buffer underrun protection is needed constantly and that consumes time. Try lowering the burn speed down to 24x.
Do ur drives use DMA transfer mode in ur 2nd PC?

[Arsenic]

My DMA Modes are as follows:
Hardrive: Mode 5
DVD drive: Mode 2
CD Writer: Mode 2

Do those make sense?
I will try the slower burn to see if it helps any tho.
Thanks for the input.

[Hiro2k]

Perhaps the Audio Read speed on you DVD drive is not as fast as the HP DVD writer. I have one on my system. My DVD is a Liteon with only 8x Audio Read Speed. My Burner is also Liteon but has a 40X audio read speed. That might be the difference you see.

[Arsenic]

Good point.
The burner specs are 16 x DVD, 40x CDROM but how would I figure out the actual 'audio speed' setting?
It would help in picking a more viable burn speed to matchup with the extremely fast 40x writer I am using.