bd-r dl write speed 0.9x instead of 2x

[kendeman]

Burner: LG BH10LS30

Media: sony BD-R DL 50gb 2x (Disc ID: MEI-T01-001)

 

Write speed is set to 2x but the effective write speed stays around 0.9x

The Disc is not empty, should i fully erase it first and see what effective write speed it gets?

 

HL-DT-ST BD-RE BH10LS30 1.01 (SATA)

Current Profile: BD-RE

 

Disc Information:

Status: Complete

State of Last Session: Complete

Erasable: Yes

Sessions: 1

Sectors: 23.652.352

Size: 48.440.016.896 bytes

Time: 5256:06:52 (MM:SS:FF)

Supported Write Speeds: 2x

 

TOC Information:

Session 1... (LBA: 0)

-> Track 01 (Mode 1, LBA: 0 - 23652351)

-> LeadOut (LBA: 23652352)

 

Disc Definition Structure:

ISA0 Size: 4.096 clustors - Full: No

OSA0 Size: 8.192 clustors - Full: No

ISA1 Size: 4.096 clustors - Full: No

OSA1 Size: 8.192 clustors - Full: No

Certified: No

Scanned: No

 

BD Disc Information (L0):

Disc ID: MEI-T01-001

Disc Type: BD-RE

Disc Size: 120mm

Disc Class: 0

Disc Version: 2

Disc Time Stamp: 12/2005

Number of Layers: 2

Layer Type: Rewritable

DVD Layer Present: No

CD Layer Present: No

Channel Bit Length: 74.50nm (25GB Per Layer)

BCA Present: Yes

Maximum Transfer Rate: Not Specified

First PAA of Data Zone: 131.072

Last PAA of Data Zone: 1.658.494

 

BD Disc Information (L1):

Disc ID: MEI-T01-001

Disc Type: BD-RE

Disc Size: 120mm

Disc Class: 0

Disc Version: 2

Disc Time Stamp: 12/2005

Number of Layers: 2

Layer Type: Rewritable

DVD Layer Present: No

CD Layer Present: No

Channel Bit Length: 74.50nm (25GB Per Layer)

BCA Present: Yes

Maximum Transfer Rate: Not Specified

First PAA of Data Zone: 2.535.808

Last PAA of Data Zone: 4.063.230

 

Layer Information:

Layer 0 Sectors: 12.219.392 (51,66%)

Layer 1 Sectors: 11.432.960 (48,34%)

 

Format Capacities:

DT: 0x02 - NB: 23652352 (0x0168E800) - TDP: 24576

FT: 0x00 - NB: 23652352 (0x0168E800) - TDP: 24576

FT: 0x01 - NB: 23259136 (0x0162E800) - TDP: 2048

FT: 0x30 - NB: 23652352 (0x0168E800) - TDP: 24576

FT: 0x30 - NB: 23259136 (0x0162E800) - TDP: 36864

FT: 0x30 - NB: 24307712 (0x0172E800) - TDP: 4096

FT: 0x31 - NB: 24438784 (0x0174E800) - TDP: 2048

 

Performance (Write Speed):

Descriptor 1...

-> B0: 0x02; B1: 0x00; B2: 0x00; B3: 0x00

-> EL: 23652351 (0x0168E7FF)

-> RS: 17.919 KB/s (4x) - WS: 8.991 KB/s (2x)

 

 

Regards, Ken

[kendeman]

Okay problem solved now it burns at 2.0x, after doing a quick erase first.

[LIGHTNING UK!]

It's because the disc is (was) formatted with spare areas enabled - thus the drive activates 'hardware defect management' and verifies every 'write' operation on the fly as it goes.

 

Doing so slows the burn down a lot.

 

I can't see that a quick erase in ImgBurn would have made any difference to it... is that really all you did?

 

A Full erase would have (if using default settings) formatted the disc again but turned off spare areas and therefore deactivated defect management.

 

The other way to make it burn at normal speed (even when defect management is enabled) is to enable the 'FastWrite' option in the settings ('Write' tab).

[kendeman]

I tried doing a full erase, but at 54% got stuck and i couldn't even open the drive untill after rebooting windows.

Then i tried burning an image to the disc but it got stuck right away, iirc something about setting the write speed. Tried aborting but it was taking too long so i rebooted again.

Did the quick erase then wich i mentioned in the previous post, and burned the image at 2x

[LIGHTNING UK!]

The full erase is what would have done it, even if it got stuck.

 

Quick erase does nothing except write zeros to the first few hundred sectors... which of course you'd be writing to anyway if you're trying to write an image.