cdrw performance

acid_kewpie · 09-13-2002, 10:01 AM

i've just got a new cd burner, 48x12x48 with justlink instead of burn proof. i couldn't fine much info about justlink out there but it seems that the deal is that it's turned on like it or not, so there's not many questions to ask! but anyway... in a moderately similar vein to the harddrive performance thread, i'd like to kow how fast people are burning their cd's. excluding fixation time (which cdrecord gives seperately anyway) how many Mb's per second are you burning?

Excerpt from eroasters cdrecord output:

Code:

Total rockridge attributes bytes: 275
Total directory bytes: 0
Path table size(bytes): 10
Max brk space used 6384
349456 extents written (682 Mb)
Track 01: writing  30 KB of pad data.
Track 01: Total bytes read/written: 715685888/715716608 (349471 sectors).
Writing  time:  175.976s
Fixating...
Fixating time:   21.567s
cdrecord: fifo had 11274 puts and 11274 gets.
cdrecord: fifo was 0 times empty and 5303 times full, min fill was 71%.

so my new drive goes at (682mb / 176s) 3.875Mbps for this example (Which was One Flew Over The Cuckoos Nest FYI).

This also translates to a REAL speed of 26.5x, as single speed is (700mb / (80mins*60sec) 0.146Mpbs as (3.875 / 0.146) = 26.5x

yours?

incidentally, although the drive is meant to be a 48 speed, cdrecord only lets it go at 40 speed. not that it IS burning at 40 speed of course. anyone know about this limit?

crashmeister · 09-13-2002, 10:19 AM

I can't do more than 16x because I can't find any faster rated cd's around here.I can set whatever I want to (max for the burner being 32x) but it wouldn't write faster than 16x.
What cd did you use there - if it is a 32x it's at least pretty close to max.
Don't know about eroast - I am fiddling around with k3b right now.You can set the max speed to anything you like there.What it does with that is another question.

acid_kewpie · 09-13-2002, 10:46 AM

HAHAHA, i never even checked! utter bog standard 100 spindle stuff! wow i can finally go TOO fast! never thgouth of that!

zLinuxz · 09-13-2002, 01:09 PM

maybe you guys should take a look at www.xcdroast.org. You can burn as fast as your cd-rw can, and read as fast as your cd-rw or dvd can as well. You can change pretty much everything, which is really nice.
I just bought a Yamaha 24x10x40. It burnt me a 698mb cd in 179.527 seconds, excluding fixation. It's really fast even though it is half the speed as yours because it's a Scsi

, what a blessing. (it's also big bucks though, $249.)

acid_kewpie · 09-13-2002, 01:35 PM

no not really i just don't think my system can go any faster... like yours can't either

crashmeister · 09-13-2002, 03:00 PM

Could somebody shed some light on this please?
Whn I use 4x or 8x or 12x or 16x my drive burns at that rate (roughly).But I can't burn at 32x with cd's that are 16x-rated.Is that my drive being uncooperative or do the cd's really linit the speed?

bubba169 · 09-13-2002, 04:59 PM

As I understand it the media (cd-r/rw discs) set the speed. For example I have a 16x10x40 Plextor plexiwriter, I bought so cd-rw's dirt cheap on a closeout table when I got home & looked at them they were 4x so even though my CD-rw drive is 10x I can only burn at 4x on these cd-rw discs. As for a top speed I like to burn slower seems to work better that way (under win98). In Linux I just burn away & don't worry about speed & I have yet to burn a bad disc under Linux. Anyways if you have faster media than your drive is then it will work okay. I normally buy 32x CD-r's but burn at 16x

zLinuxz · 09-13-2002, 05:36 PM

you can burn them at any speed you want...but most likely...after the burn they won't work. I also once bought 100 super cheap cd's...those that don't come in jewel case, nor had any kind of stikers. Just the plain cd. If I ever burnt them at 6x or over...the first part of the cd would be ok...but from the middle ot the end, if it was a sound cd, you would just hear static.

MasterC · 09-14-2002, 02:55 AM

Well, I on the other hand, have great luck I guess. I have a Yamaha 16x10x40 (I think, it's been a while, but I am thinking that's right...) and I buy CDR's at 32x by the spindle of 100's. In Linux I never make coasters, and burn at 16x constantly. My CDRW discs are only 4x discs, and can only burn at 4x. Still, no problems there either.

In winbloze however, I used to make about 1 out of 5 cd's coasters. No matter the speed, they would just get buffer underrun or overflow or whatever; they just would die.

Oh, it is an IDE burner btw. (Model is something like crw2100?)

Cool

crashmeister · 09-14-2002, 03:25 AM

What now?
Does anybody actually know if the speed is limited by the cd's?Is it limited by software or hardware?

MasterC · 09-14-2002, 04:20 AM

I believe it is. My burner can burn CDRW's at 10x but since my media (the CDRW discs) are only rated at 4x, I cannot burn above that, it would appear to be hardcoded into the media. If I specify speed=10x (or anything above 4x) cdrecord simply won't start and gives me an error (not at home right now to post the error message). So it would appear that it is limited by the CD's themselves.

Cool

GT I.N.C · 09-14-2002, 04:21 AM

hardware and cd's i suppose.....most cd's can't handle or let you burn faster than 32X but some people hardware don't even let you burn at 24X....