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Home > Hardware Reviews > Optical Storage > DVD Recorders Double Layer

Tuesday, June 08, 2004
LiteOn SOHW-832S

2. Transfer Rate Reading Tests

LiteON SOHW-832S Dual DVD±RW Recorder - Page 2

Transfer Rate Reading Tests

- CD Format

The LiteOn SOHW-832S supports up to 40X reading speed. Below are the transfer rate graphs, along with the comparison with the other two drives:

Click for the Seek Times Graph!

Click for the Seek Times Graph!

As we can see from our tests, the drive seems slightly faster than its predecessor with Mode1 Pressed disc and Mode1 CD-R media. The seek times are also lower than the 812S drive (click on its graph to view these). The 832S has the same maximum speed for US-RW media, only 32X.

- DVD Format

Click for the Seek Times Graph!

As was expected, the SOHW-832S is faster than the 812S, even if by a difference of only 0.4X, with SL (Single Layer) DVD-ROM media.

Click for the Seek Times Graph!

The two layers of a PTP DVD-ROM disc are read sequentially with the drive starting reading from the inner part of the disc, which is the beginning of each layer, towards the outer range, for each layer. The 832S was again faster than the 812S by 0.5X

Click to Enlarge!

The first layer of an OTP dual layer DVD-ROM is read exactly the same way as the first layer of the PTP disc we tested previously. The difference here is the reading strategy of the second layer of the disc. The beginning of the second layer is located in the outer part of the disc, so the drive starts reading from the outer tracks toward the inner part of the disc. The average reading speed is 6.26X (again 3~8X CAV).

Again, the SOHW-832S is slightly faster compared to the 812S. The only problem came with DVD-RW media, since the drive dropped its reading speed at the end resulting in a lower average rate.

Since both the 812S/832S have the same reading speed (8X CAV) for DVD-Video discs, the ripping performance was more or less the same.

- Appendix

Nero CD-DVD Speed Graphs




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