2500A wite quality with crappy DVD-R

Hi all, yesterday I bought my NEC 2500A and I tried it on some VERY crappy DVD-R I had here at home.
It’s a cakebox of MW FutureTechnology white top, DVD-R 4X no MID code :sunglasses:

This is all the data I have on this media:

Full media code:

00000000 00 6C 00 00 01 40 C1 FD 9E D8 52 00 02 87 0E 15 .l…@…R…
00000010 98 9A 90 00 03 00 00 00 00 00 00 00 04 00 00 00 …
00000020 00 00 00 00 05 CC C0 00 00 00 01 00 06 0B 10 11 …

                        Media Information                            

Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID
Format Capacity 4.36GB(4.68GB)
Book Type DVD-R
Media Type DVD-R
Media Id Code Speed Unknown
Available Write Descriptor CLV 4.0x 5540KBps
Available Write Descriptor CLV 2.0x 2770KBps
Available Write Descriptor CLV 1.0x 1385KBps
Write Strategy Speed 4.0x 5540KBps
2x Speed OPC beta 0B
2x Speed OPC power 10
2x Write Strategy field 1 11 87 78 80
2x Write Strategy field 2 88 80 00 00 00 00
4x Speed OPC beta 06
4x Speed OPC power 17
4x Write Strategy field 1 0D 0F 0B 0B
4x Write Strategy field 2 98 08 0F 0B
4x Write Strategy field 3 00 00 00 00
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 D0 00 00
Data area starting sector 30000h
Data area end sector 22D7DFh
Linear Density 0.267um/bit
Track Density 0.74um/track
Number of Layers 1

With these discs I could never get a readable one , and I tried writing on:

  • LDW 451S - GSB7
  • LDW 451S@851S GS0A
  • LDW 451S@851S GS0F
  • LDW 451S@812S US0A
  • LDW 451S@SONY DW-U18A UYS1
  • NEC2500A stock FW 1.06 03121900 (the first and better one)

Well…the 2500 is the only that managed to write a readable disc, even if not perfect.

Here’s some kprobe scans:

LDW 451S - GSB7

and here’s the kprobe scan with 451S@DW-U18A UYS1

Please note that even if not fully readable this disc could be read without errors for 2/3 of it’s lenght.
It seems UYS1 is the best firmware for this crappy discs and LDW451.


This was burned on the NEC2500A @2X (NEC only allows 2X on these crappy discs).

This time the disc is readable until the end, even if it slows down in the last part. It can be read on the LDW451 and on the NEC itself.


Please give it a try with my Beta 6 firmware, which should give better results on these discs!

Really? I’ve been reading about it in the past days and hadn’t understood it could improve also on bad media, if you say it can I’ll try it at once!

Thanks for the suggestion and for your hard work on the 2500! :slight_smile:

I’ll let you know of my findings!

Live long and prosper

WOW!!!

What can I say?
I’ve just tried your firmware beta 6 on my drive, it recognized the disks as 2X-4X-6X capable and let me burn it at 6X.
But…I didn’t dare to hope in a good burn with such crappy media, at the triple of my previous speed…

Well not only it burned the disk without errors but the kprobe scan has improved!!

Take a look

Full media code:

00000000 00 6A 00 00 01 40 C1 FD 9E D8 52 00 02 87 0E 15 .j…@…R…
00000010 98 9A 90 00 03 00 00 00 00 00 00 00 04 00 00 00 …
00000020 00 00 00 00 05 CC C0 00 00 00 01 00 06 0B 10 11 …

                        Media Information                            

Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID
Format Capacity 4.37GB(4.69GB)
Book Type DVD-R
Media Type DVD-R
Media Id Code Speed Unknown
Available Write Descriptor CAV 5.9x 8112KBps
Available Write Descriptor CLV 4.0x 5540KBps
Available Write Descriptor CLV 2.0x 2770KBps
Write Strategy Speed 4.0x 5540KBps
2x Speed OPC beta 0B
2x Speed OPC power 10
2x Write Strategy field 1 11 87 78 80
2x Write Strategy field 2 88 80 00 00 00 00
4x Speed OPC beta 06
4x Speed OPC power 17
4x Write Strategy field 1 0D 0F 0B 0B
4x Write Strategy field 2 98 08 0F 0B
4x Write Strategy field 3 00 00 00 00
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 D0 00 00
Data area starting sector 30000h
Data area end sector 22ECFFh
Linear Density 0.267um/bit
Track Density 0.74um/track
Number of Layers 1

Disc burned @6X , it took 11’18" to burn


Originally posted by TheBlob
[B]WOW!!!

What can I say?
I’ve just tried your firmware beta 6 on my drive, it recognized the disks as 2X-4X-6X capable and let me burn it at 6X.
But…I didn’t dare to hope in a good burn with such crappy media, at the triple of my previous speed…

Well not only it burned the disk without errors but the kprobe scan has improved!!

Take a look

Full media code:

00000000 00 6A 00 00 01 40 C1 FD 9E D8 52 00 02 87 0E 15 .j…@…R…
00000010 98 9A 90 00 03 00 00 00 00 00 00 00 04 00 00 00 …
00000020 00 00 00 00 05 CC C0 00 00 00 01 00 06 0B 10 11 …

                        Media Information                            

Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID
Format Capacity 4.37GB(4.69GB)
Book Type DVD-R
Media Type DVD-R
Media Id Code Speed Unknown
Available Write Descriptor CAV 5.9x 8112KBps
Available Write Descriptor CLV 4.0x 5540KBps
Available Write Descriptor CLV 2.0x 2770KBps
Write Strategy Speed 4.0x 5540KBps
2x Speed OPC beta 0B
2x Speed OPC power 10
2x Write Strategy field 1 11 87 78 80
2x Write Strategy field 2 88 80 00 00 00 00
4x Speed OPC beta 06
4x Speed OPC power 17
4x Write Strategy field 1 0D 0F 0B 0B
4x Write Strategy field 2 98 08 0F 0B
4x Write Strategy field 3 00 00 00 00
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 D0 00 00
Data area starting sector 30000h
Data area end sector 22ECFFh
Linear Density 0.267um/bit
Track Density 0.74um/track
Number of Layers 1

Disc burned @6X , it took 11’18" to burn [/B]

I know what I’m doing :stuck_out_tongue: Maybe they’ll be even supported at 8x soon :slight_smile:

Originally posted by Herrie
I know what I’m doing :stuck_out_tongue: Maybe they’ll be even supported at 8x soon :slight_smile:

Well that would be excellent!

I’ve made a check with Nero DVD speed and the disk burned @2X reads slightly better towards the end and slighly worse in the middle. I think this media just wasn’t made to go so fast :sunglasses:

Both the discs slow down and “hiccup” in the last gigabyte , but the 2X burn has a more “constant hiccup” , instead the 6X burn increases in speed longer but then the hiccups are worse and it slows down to 0.71X in some places.

Take a look:

Media burned @2X with stock firmware 1.06


Media burned @6X

Anyway I checked it with CDCheck and there are no CRC errors.

HTH!


And I forgot to say…

Next time I’ll try to burn this media @4X , let’s see how they burn :slight_smile:

At the moment I don’t have any more data to burn :eek:

Be well!

Herrie saves the day again :iagree:

Lordy.

Must try this beta firmware, that looks fantastic!!!

Hi again!

I’ve just finished another burn of this no-id media and I’d like to share my results with you.
This time I burned it @4X , with Herrie’s firmware 1.07b6.
The Kprobe scan looks similar to the one done @6X but the read speed is better than the “previous best” obtained when burning @2X (with stock 1.06 fw).

take a look


and this is the cdspeed result:

as you can see speeds keep ramping up until the 4GB mark, where it starts the “usual” hiccups.
The previous best wasn’t the 2X burn as I stated before, but the 6X burn, and it began to hiccup near the 3.25GB mark.

Live long and prosper!


well it’s obvious that Herries’ firmware gives better results on these discs, but you can’t expect miracles to happen with crap discs :sad:

A crap disc is a crap disc!
Please get some good media. :cool:

I think I have the same media here…

I got 100 of them in an exchange for 50 discs that didn’t work. I haven’t been impressed; so far the only drive that’s been capable of writing a usable disc past 3.5Gb has been the Pioneer 107, and then only with firmware 1.12 and above.

This new beta firmware is OK to 4Gb (readable to the end with only slight slowdown on better drives), and I think it would go further were it not for the fact that the media is variable – some discs have uneven patches on the plastic surface which create blotches on the burn.

But this new firmware is much better than before.

I will run further tests. These discs aren’t being used for much due to their low quality but if I can use them for short-term data storage I’ll be happy.

Well, I have to say I’m impressed. The PI/PO error rates do escape toward the end (this being a bad disc I used with more than average imperfections around the edge) but upto 4Gb the error rates are amazingly low for this media. With a LiteOn 851s the errors were ~1200 the whole way through; with the Pioneer 105 and NEC 2500A original around 700; 107 about 250-350.

With the Herrie firmware the error rates are hovering at around 120 after initially being about 350. This brings the disc into the “not too bad” category, and I never thought it possible with these crap discs!!!

Here’s a KProbe scan:

(451s@851s, 8ECC, 4x)

[For those who know me and have read my rants about KProbe on CDRLabs, I think I’ve ironed out the faults and this scan should be a fair reflection on the disc]

Make allowances on this disc for the bad patch at the end – after burning I realised this was a particularly bad one for blotching, which is a fault that has plagued this media:


Originally posted by wesociety
well it’s obvious that Herries’ firmware gives better results on these discs, but you can’t expect miracles to happen with crap discs :sad:

I know, I know…but being able to write a readable disc with this junk is already a miracle! :bigsmile:


A crap disc is a crap disc!
Please get some good media. :cool:

Eh eh eh, I’ve already gotten it…but…now that I can finish this darn batch of crap I’ll do…also because I payed it 69€ :a
And it was the cheapest!!!
Around here I’m lucky if I find discs around 2€ , but more often they are around the 2.5€ area, and I’m talking of the offers and rebates…usually a single dvd can be found for 3€ (-R) or 3.5-4 (+R).
So…I have to protect the investment…in the end they were the cheapest dvd I had ever seen for sale!! :confused:

Live long and prosper!

Originally posted by TheBlob


Around here I’m lucky if I find discs around 2€ , but more often they are around the 2.5€ area, and I’m talking of the offers and rebates…usually a single dvd can be found for 3€ (-R) or 3.5-4 (+R).

Where do you live? Throughout Europe discs shouldn’t cost much more then just 1,- each!