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| Posted by | Zevi A. |
| Posted on | 03/08/06 10:33 |
| Number of views | 30430 |
DVD-RAM Writing Speed and Quality:
The Panasonic SW-5582 supports writing and reading the DVD-RAM format. Let us look at the recording side of the disc, and as you can see it has differences from the other DVD+R/W/R9 DL and DVD-R/W discs.
On the data side, we can see a very fascinating pattern of lighter spots, supposedly these spots are used for calibration while writing and reading.
A DVD-RAM's disc can be formatted in the following formats: FAT32, UDF 1.02, UDF 1.50, UDF 2.00, UDF 2.01, and UDF 2.50.
By formatting a DVD-RAM disc with FAT32 it will act like a removable hard drive and all writing will be done as 'background processes". Meaning you do not have to wait for it to finish, you can start or work with other applications while the DVD-RAM is working without noticing any 'hangs" or CPU slowdowns.
Lets us take a look at how the drive performs:
Maxell branded 5x media manufactured by Maxell.
Thanks to Maxell USA for providing this media.
Writing Maxell 5x without verification
Writing Maxell 5x with verification
Transfer Rate test
As we can see, the Panasonic SW-5582 writes 5x DVD-RAM without any problem. It reads back the disc at 5x speed nicely and ScanDisc shows no read-back problems.
We will now run a disc quality scan on our burned media using the Lite-On SHM-165P6S and Nero CD-DVD Speed version 4.53.3 Beta. We would like to mention that this test should not be necessary under normal use of DVD-RAM media, as the drive will automatically check the disc for errors as it writes.
Verbatim branded 3x media manufactured by Matsushita.
Thanks to Verbatim USA for providing this media.
Writing Verbatim 3x without verification
Writing Panasonic 3x with verification
Transfer Rate test
No problem with writing 3x DVD-RAM. The drive read back the disc at 3x speed and ScanDisc shows no read-back troubles.
We will now run a disc quality scan on our burned media using the Lite-On SHM-165P6S and Nero CD-DVD Speed version 4.53.3 Beta. Again, this test should not be necessary under normal use of DVD-RAM media, as the drive will automatically check the disc for errors as it writes.
For those of you who are not familiar with DVD-RAM, you may probably think that something went wrong during the write process with the verification turned on, since the 3x and 5x media was written at 1.3x and 2x, respectively. But don't worry, that is pretty normal for DVD-RAM discs. The reason for the lower writing speed is that the drive constantly reads back the data after writing it to verify that it's written correctly. We can also call it a 'bullet proof" writing/verify technique, with no data loss/errors.
Head on to next page and read about the most interesting part: Blu-ray features and performance...
DVD+R DL/-R DL Writing Performances
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