Home News Reviews Forums Shop


Ask Your Writing Quality Test Questions Here

Post your writing quality results here. Please read FAQ before posting.

Postby dodecahedron on Wed Jun 21, 2006 4:52 pm

MediumRare wrote:I noticed that the attachments here aren't visible unless you're logged on. This is the only forum where this is the case.

???
this is exactly how it is @ cdfreaks - attachments only visible when logged on!
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
-- JRRT
M.C. Escher - Reptilien
User avatar
dodecahedron
DVD Polygon
 
Posts: 6865
Joined: Sat Mar 09, 2002 12:04 am
Location: Israel

Postby dodecahedron on Wed Jun 21, 2006 4:54 pm

question of protocol:

are all questions/discussions about media testing to be posted/asked in this topic only?
isn't it a bit too much for just one thread?
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
-- JRRT
M.C. Escher - Reptilien
User avatar
dodecahedron
DVD Polygon
 
Posts: 6865
Joined: Sat Mar 09, 2002 12:04 am
Location: Israel

Postby dodecahedron on Wed Jun 21, 2006 4:58 pm

what speed media tests should be posted ?

example:
i have a couple of TY spindles, apparently not that great. rated 8x, i usually burn at 4x to get better writing quality out of it. it can also (sometimes) burn at 12x.
what speed should i post? only the fasted the drive will do ? only the rated speed ? all of the speeds at which i tested ?
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
-- JRRT
M.C. Escher - Reptilien
User avatar
dodecahedron
DVD Polygon
 
Posts: 6865
Joined: Sat Mar 09, 2002 12:04 am
Location: Israel

Postby [buck] on Wed Jun 21, 2006 7:05 pm

dodecahedron wrote:what speed media tests should be posted ?

example:
i have a couple of TY spindles, apparently not that great. rated 8x, i usually burn at 4x to get better writing quality out of it. it can also (sometimes) burn at 12x.
what speed should i post? only the fasted the drive will do ? only the rated speed ? all of the speeds at which i tested ?

Whichever you want to show us :D There's no formal rules for this...
User avatar
[buck]
CD-RW Player
 
Posts: 435
Joined: Thu Nov 25, 2004 1:49 am
Location: Ottawa, ON, CA

Postby Ian on Wed Jun 21, 2006 9:04 pm

dodecahedron wrote:
MediumRare wrote:I noticed that the attachments here aren't visible unless you're logged on. This is the only forum where this is the case.

???
this is exactly how it is @ cdfreaks - attachments only visible when logged on!


I thought I fixed this. Attachments should be visible to everyone, logged in or not.
"Blu-ray is just a bag of hurt." - Steve Jobs
User avatar
Ian
Grand Poobah
 
Posts: 14882
Joined: Sun Apr 08, 2001 2:34 pm
Location: Madison, WI

Postby bill on Wed Jun 21, 2006 10:07 pm

Ian wrote:
I thought I fixed this. Attachments should be visible to everyone, logged in or not.



Has worked fine on this end, logged in or out, doesn't matter.
bill
bill
CD-RW Supplier
 
Posts: 773
Joined: Fri Feb 20, 2004 11:30 pm
Location: USA

Postby dodecahedron on Wed Jun 21, 2006 11:54 pm

Ian wrote:I thought I fixed this. Attachments should be visible to everyone, logged in or not.

sorry about that, i just reread MediumRare's post and responded to the comment that this is the ONLY forum etc.. it's that way at cdfreaks all the time. not logged in = no pics.

OK then i'll post the scans of the media for all speeds at which i scan.
e.g. YUDEN000T02 @ 4x, 8x, 12x ...
just that i thought that it might "burnden" the forum with many posts, and maybe most people aren't interested in anything less than the fastest, or less than the rated speed, so maybe i shouldn't post those.
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
-- JRRT
M.C. Escher - Reptilien
User avatar
dodecahedron
DVD Polygon
 
Posts: 6865
Joined: Sat Mar 09, 2002 12:04 am
Location: Israel

Postby dolphinius_rex on Thu Jun 22, 2006 12:42 am

dodecahedron wrote:just that i thought that it might "burnden" the forum with many posts, and maybe most people aren't interested in anything less than the fastest, or less than the rated speed, so maybe i shouldn't post those.


Nah, post them all. Some people want to know how discs perform at various speeds. It's all educational right? :D
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R

The Progression of Computer Media
User avatar
dolphinius_rex
CD-RW Player
 
Posts: 6923
Joined: Fri Jan 31, 2003 6:14 pm
Location: Vancouver B.C. Canada

Postby dodecahedron on Thu Jun 22, 2006 2:13 am

i already posted this here and got no response. maybe will get more here.

when i take a disc out of the drive, either having just burned it or even having read it, it is warm to the touch.
damn, i put a DVD i just burned in the drive just before this post and forgot it there for 5 minutes, it gets warm from just sitting in the drive!

question:
how does the disc temperature affect the quality scans? anyone test this out ?

do you do a media scan right after having burned the disc or do you wait a little for the disc to cool off ? possibly also for the drive to cool off ?

also, do you let the burner drive cool off after one burn before burning the next disc ? if so how long ?

c'mon, we have some serious media testers here...discussion!
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
-- JRRT
M.C. Escher - Reptilien
User avatar
dodecahedron
DVD Polygon
 
Posts: 6865
Joined: Sat Mar 09, 2002 12:04 am
Location: Israel

Postby dolphinius_rex on Thu Jun 22, 2006 3:34 am

For myself, I make sure I use a case built for extreme cooling. My drives DO heat up, but during the hotter days I make sure to give them lot's of down time.

I've noticed that error rates can scan higher when the drive is too hot in the past, so if you are burning and scanning in the same drive, and you feel the heat is getting excessive, it might not be a bad idea to let it cool down a bit. I have a feeling it gets much hotter in your neck of the woods then in mine :wink:
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R

The Progression of Computer Media
User avatar
dolphinius_rex
CD-RW Player
 
Posts: 6923
Joined: Fri Jan 31, 2003 6:14 pm
Location: Vancouver B.C. Canada

Postby MediumRare on Thu Jun 22, 2006 7:11 am

dodecahedron wrote:
Ian wrote:I thought I fixed this. Attachments should be visible to everyone, logged in or not.

sorry about that, i just reread MediumRare's post and responded to the comment that this is the ONLY forum etc.. it's that way at cdfreaks all the time. not logged in = no pics.

Ian fixed that a long time ago. I used forum to mean an entry as shown in the "forums" tab here, e.g. "DVD Writers", "The Beer Garden". CDFreaks would be another board.

This is a bit O.T., but I think it's better the way it's done here- avoids having people sign up just to see the information. It's handled like that at Doom9 too (both the English and German boards).

G
User avatar
MediumRare
CD-RW Translator
 
Posts: 1768
Joined: Sun Jan 19, 2003 3:08 pm
Location: ffm

Postby MediumRare on Thu Jun 22, 2006 7:16 am

dodecahedron wrote:i already posted this here and got no response. maybe will get more here.

Frankly, I think this topic deserves it's own thread.

I do about 10x as much scanning as burning, :o so I don't have too many thermal problems at present. :wink: I have seen variations of up to a factor of 5 in PIE with repeated scans- that may have been a thermal problem. Can't say anymore.

I always scan a disc with KProbe immediately after burning it. If I'm not in a great hurry, this means:
- KProbe at 2 speeds,
- transfer rate (TRT) and often quality test with CD-Speed
- and lately beta and jitter with DVDScan.

I hope to finally add some long-promised LiteOn scans to this forum when I get a bit sorted out- maybe next week.

G
User avatar
MediumRare
CD-RW Translator
 
Posts: 1768
Joined: Sun Jan 19, 2003 3:08 pm
Location: ffm

Postby dodecahedron on Thu Jun 22, 2006 7:24 am

MediumRare wrote:Frankly, I think this topic deserves it's own thread.

i think so too, but that topic got no response.
moreover it would make sense for the discussion to be here, in this forum. maybe it's possible to construct some mechanism where there are thread the discuss media testing in this forum, in the DVD Writers forum they would get lost. make create subforums - one for discussing media testing, the other for the actual scans ?

MediumRare wrote:I do about 10x as much scanning as burning, so I don't have too many thermal problems at present

scanning causes heat too. feel a disc after you've scanned it!
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
-- JRRT
M.C. Escher - Reptilien
User avatar
dodecahedron
DVD Polygon
 
Posts: 6865
Joined: Sat Mar 09, 2002 12:04 am
Location: Israel

Postby [buck] on Thu Jun 22, 2006 7:25 am

I haven't really looked into how heat affects scans to be honest. I'll see if I can do a few tests when I get home.
User avatar
[buck]
CD-RW Player
 
Posts: 435
Joined: Thu Nov 25, 2004 1:49 am
Location: Ottawa, ON, CA

Postby Ian on Thu Jun 22, 2006 7:57 am

dodecahedron wrote:moreover it would make sense for the discussion to be here, in this forum. maybe it's possible to construct some mechanism where there are thread the discuss media testing in this forum, in the DVD Writers forum they would get lost. make create subforums - one for discussing media testing, the other for the actual scans ?


I've been meaning to make an entire section for writing quality (maybe media in general?). Part of this would include a section for general writing quality discussion. Thoughts?
"Blu-ray is just a bag of hurt." - Steve Jobs
User avatar
Ian
Grand Poobah
 
Posts: 14882
Joined: Sun Apr 08, 2001 2:34 pm
Location: Madison, WI

Postby [buck] on Thu Jun 22, 2006 6:55 pm

Alrighty, I run a couple tests. Here's what I did:

1. Scanned an Verbatim MCC004 disc in a DW1640 that has been idle all day
2. Ran 3 consecutive transfer rate tests on that disc to heat up the drive
3. Immediately scanned that same disc again

(see attachments)

As you can see in the second scan, PIE total is up ~35%, jitter is up ~0.5%, and PIF total is up just marginally. Based on this test, I would say this particular drive *is* affected by temperature, just not a whole lot.
Attachments
b.png
scan after 3 TRTs
b.png (59.26 KiB) Viewed 9527 times
a.png
initial scan on the cool drive
a.png (59.85 KiB) Viewed 9528 times
User avatar
[buck]
CD-RW Player
 
Posts: 435
Joined: Thu Nov 25, 2004 1:49 am
Location: Ottawa, ON, CA

Postby Ian on Wed Aug 02, 2006 1:45 pm

Please ask your questions in the General Media Discussion section of the forum.
"Blu-ray is just a bag of hurt." - Steve Jobs
User avatar
Ian
Grand Poobah
 
Posts: 14882
Joined: Sun Apr 08, 2001 2:34 pm
Location: Madison, WI

Previous

Return to Writing Quality Results

Who is online

Users browsing this forum: No registered users and 0 guests

All Content is Copyright (c) 2001-2017 CDRLabs Inc.