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Blu-ray Writing performance
An Introduction to Blu-Ray
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 Blu-Ray format uses a blue-violet laser, which explains the name Blu-ray.
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 drives can also be made backwards compatible with CDs and DVDs through the use of a BD/DVD/CD compatible optical pickup unit.
Now let’s take a look at the track pitch and compare them with that of DVD
As we can see in the above screenshots, the storage density of Blu-ray is much higher than DVD. The Blu-ray laser beam spot is also much narrower than that of DVD.
Blu-Ray Error specification:
In the above table we present some of the specifications for reported errors on Blu-ray media. At present we have no equipment or software available for measuring these errors.
BD-R writing tests
The specifications of the iHBS112 state that the drive is able to write BD-R at 12x. Let us find out how the drive really performs.
Reviewers note: We had no media that was supported at 12x by the iHBS112, and also we weren’t able to burn faster than the rated speed of the media. All disc quality test were done at max speed.
BD-R 25GB
For this test we used Nero Disc Speed to create our test disc.
As we can see the iHBS112 has no problems reading back the disc.
BD-R LTH Type 2x
A disappointing result, we didn’t expect this from a new drive.
BD-RE:
The specifications of the Liteon Ihbs112 state that the drive is able to write BD-RE discs at 2x. Let us find out how the drive really performs.
BD-RE 25GB
The iHBS112 burned our test BD-RE media from VERBATIM in 45 minutes and 02 seconds.
Now let’s see how the iHBS112 read’s and scans our test disc.
BD-RE 25GB
The iHBS112 burned our test BD-RE 25GB media from TDK in 44:50 minutes.
Now let’s see how the iHBS112 read’s and scans our test disc.
Summary:
Apart from our failed burn on the LTH media the iHBS112 had no problems in creating, reading and scanning back our test discs.
At this point we like to say that we didn’t have any other drive capable of scanning our disc so we can’t draw any safe conclusion on the quality of the burned discs. So we can say that the lower the better.
Let’s round off this review with the Authors page, with some real world and advanced tests….
