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Blu-ray Writing Performance
An Introduction to Blu-Ray Disc:
Until recently, optical disc technologies such as DVD, DVD±R, DVD±RW, and DVD-RAM relied on a red laser to read and write data. The new technology Blu-Ray format uses a blue-violet laser, which explains the name Blu-ray.
Blu-ray drives can also be made backwards compatible with CDs and DVDs through the use of a BD/DVD/CD compatible optical pickup unit.
A blue-violet laser (405nm) has a shorter wavelength than a red laser (650nm); this makes it possible to focus the laser with even greater accuracy. This will allow data to be packed more tightly, so it’s possible to squeeze more data on the disc even though it’s the same size as a CD/DVD. This together with the change of numerical aperture to 0.85 enables Blu-ray discs to hold 25GB/50GB.
Blu-ray media is structurally different from DVD media. The Blu-ray disc consists of a single 1.1 mm thick polycarbonate substrate with a 0.1 mm thick cover layer on the bottom side of the disc, while the DVD disc is made of two 0.6 mm thick substrates. In both cases, two substrates are bonded together by a UV-cured resin adhesive:
DVD vs. Blu-ray disc structure
The larger 25 GB and 50 GB storage capacity of the Blu-ray disc is due to the higher density of pits and tracks on the disc. Unlike previous optical discs, Blu-ray uses a shorter-wavelength, tighter-focused violet laser to read and write pits that are about three times smaller than pits used in DVDs:
CD, DVD and Blu-ray laser beam color and size
CD, DVD and Blu-ray pits and tracks as seen by a scanning electron microscope
Blu-ray disc surface mapped by an atomic force microscope
Blu-ray Writing Performance:
To demonstrate burning data on a Blu-ray disc, we will be using Nero CDSpeed’s “Create Disc” function so we can ensure the discs were burned constantly throughout the process.
The ScanDisc will be performed using an Light-On DH401S and the Transfer Rate tests will be performed using a LG BH08LS20 drive to check if there is any issue with the burned disc.
Now let us take a look how the drive performs on various BD-R media:
BD-R SL:
|
Brand: |
Verbatim |
|
Manufacturer: |
Mitsubishi Kagaku Media CO.,LTD. |
|
Code: |
VERBAT-IMa (000) |
|
Made in: |
Japan |
|
Disc Type: |
BD-R |
|
Capacity: |
22.56GB |
|
Certified Speed: |
2x |
|
Write Speed: |
2x |
|
Write Time: |
45m:29s |
As you can see from the TRT and the ScanDisc the DIG-78102 had no problems with this Verbatim media.
|
Brand: |
TDK |
|
Manufacturer: |
TDK Corp. |
|
Code: |
TDKBLDRBA (000) |
|
Made in: |
Japan |
|
Disc Type: |
BD-R |
|
Capacity: |
22.56GB |
|
Certified Speed: |
2x |
|
Write Speed: |
2x |
|
Write Time: |
45m:26s |
As you can see from the TRT and the ScanDisc the DIG-78102 had no problems with this TDK media.
|
Brand: |
Ridata |
|
Manufacturer: |
Ritek Corp. |
|
Code: |
Ritek BR2 (000) |
|
Made in: |
Taiwan |
|
Disc Type: |
BD-R |
|
Capacity: |
22.56GB |
|
Certified Speed: |
4x |
|
Write Speed: |
2x |
|
Write Time: |
45m:30s |
As you can see from the TRT and the ScanDisc the DIG-78102 had no problems with this Ridata media.
BD-R DL:
|
Brand: |
Sony |
|
Manufacturer: |
Matsushita Electric Industrial Co. Ltd. |
|
Code: |
MEI T01 (001) |
|
Made in: |
Japan |
|
Disc Type: |
BD-R |
|
Capacity: |
45.11GB |
|
Certified Speed: |
2x |
|
Write Speed: |
1x |
|
Write Time: |
180m:31s |
As you can see from the TRT and the ScanDisc the DIG-78102 had no problems with this TDK Dual Layer media.
BD-RE SL:
|
Brand: |
Sony |
|
Manufacturer: |
Sony Recording Media Co. |
|
Code: |
SONY ES1 (002) |
|
Made in: |
Japan |
|
Disc Type: |
BD-RE |
|
Capacity: |
22.56GB |
|
Certified Speed: |
2x |
|
Write Speed: |
2x |
|
Write Time: |
45m:20s |
As you can see from the TRT and the ScanDisc the DIG-78102 had no problems with this Sony media.
|
Brand: |
TDK |
|
Manufacturer: |
TDK Corp. |
|
Code: |
TDKBLD WBA (000) |
|
Made in: |
Japan |
|
Disc Type: |
BD-RE |
|
Capacity: |
22.56GB |
|
Certified Speed: |
2x |
|
Write Speed: |
2x |
|
Write Time: |
45m:20s |
As you can see from the TRT and the ScanDisc the DIG-78102 had no problems with this TDK media.
BD-RE DL:
|
Brand: |
Panasonic |
|
Manufacturer: |
Matsushita Electric Industrial Co. Ltd. |
|
Code: |
MEI T01 (001) |
|
Made in: |
Japan |
|
Disc Type: |
BD-RE |
|
Capacity: |
45.11GB |
|
Certified Speed: |
2x |
|
Write Speed: |
1x |
|
Write Time: |
180m:19s |
As you can see from the TRT and the ScanDisc the DIG-78102 had no problems with this Panasonic Dual Layer rewritable media.
BD-RE DL:
|
Brand: |
TDK |
|
Manufacturer: |
TDK Corp. |
|
Code: |
TDKBLD Wfa (000) |
|
Made in: |
Japan |
|
Disc Type: |
BD-RE |
|
Capacity: |
45.11GB |
|
Certified Speed: |
2x |
|
Write Speed: |
1x |
|
Write Time: |
180m:25s |
As you can see from the TRT and the ScanDisc the DIG-78102 had no problems with this TDK Dual Layer rewritable media.
Overall thoughts:
The Digistor DIG-78102 did an Excellent job writing all of our Blu-ray media.
Summary:
|
BD-R |
MID |
Rated Speed |
Write Speed |
Write Time |
|
Verbatim |
VERBATIMa (000) |
2x |
2x |
45m:29s |
|
TDK |
TDKBLDRBA (000) |
2x |
2x |
45m:26s |
|
Ridata |
Ritek BR2 (000) |
4x |
2x |
45m:30s |
|
Sony (DL) |
MEI T01 (001) |
2x |
1x |
180m:31s |
|
BD-RE |
MID |
Rated Speed |
Write Speed |
Write Time |
|
Sony |
SONY ES1 (002) |
2x |
2x |
45m:20s |
|
TDK |
TDKBLD WBA (000) |
2x |
2x |
45m:20s |
|
Panasonic (DL) |
MEI T01 (001) |
2x |
1x |
180m:19s |
|
TDK (DL) |
TDKBLD Wfa (000) |
2x |
1x |
180m:25s |
Now let’s move to the Authors Page…
