1. Introduction
Panasonic
LF-D521 IDE DVD-RAM -
Page 1
- Introduction
Panasonic
is making a concerted effort to see DVD-RAM take off more widely outside of
Japan, where it has enjoyed huge success. DVD-RAM is one of the formats,
alongside
DVD-R and DVD-RW, that is being officially supported by the 219-member strong
DVD Forum.
The latest Panasonic drive is the DVD Burner II, a combination of a DVD/CD
drive that supports DVD-RAM and DVD-R/RW recording, reading of all the DVD formats
along with CD-R/RW reading and writing.
- DVD-RAM Features
The RAM part of the DVD-RAM name stands for Random Access Memory, which means
that the drive works in a similar way to a hard drive: content can be placed
anywhere on the disc and is indexed. This means that video editors can cut,
splice and edit video straight to DVD-RAM without having to worry about how
the data is being laid down. This certainly allows a more flexible
way of working
with data than other formats.
A main advantage of the DVD-RAM format is the high reliability it offers.
In simple words, DVD-RAM detects off-tracking caused by defect during the recording
phase, and reduces laser power in order to avoid pre-recorded data
destruction. Subsequently, the
data writing is going on after the affected addresses have been read and reallocated.
The defect management feature monitors the zones on the disc while writing
and when a defect zone is found, the DVD-RAM automatically replaces the sector
and completes writing. In addition, data verification and sector management
is carried out during the data writing process.
In the following lines we give some more technical information about the
DVD-RAM format.
The doubling of the data transfer rate (2X, 22.16 Mbps) enables DVD-RAM to
focus on AV recording capability. The track
structure common to DVD-RAM is showed in the picture below:
The land track and wobbled groove track are allocated like a
single-spiral track to achieve the seamless recording and playback. A DVD-RAM
disc has a Zoned Constant Linear Velocity
(ZCLV) format to maintain a higher constant data transfer rate over the whole
disc surface by changing its rotation speed,
zone by zone. The land and
groove track structure enables the use of a stable tracking system,
essential for achieving an affordable and highly reliable
DVD Video Recorder and DVD-RAM drive.
Data is recorded consecutively on the land and groove tracks by units of
16 physical sectors (32 KB). The error correction code
(ECC) system is the same as that of the DVD-ROM format. The data encoded by
the ECC system is scrambled and is modulated
by the same 8-16 RLL modulation code as in the DVD-ROM case. A channel bit
is converted
to a multiple-pulse signal.
In the case of DVD-RAM, real-time AV recording can be done by reading
and writing AV signals in a seamless manner, along with
the defect management system suitable both for real-time recording and reliable
data storage.
Recording of 2X-speed is one of the most important features of the latest DVD-RAM
4.7 GBytes, which ensures successful real-time AV recording. In addition,
a flexible defect management method featured both
for real-time AV recording and computer
usage has been implemented. The fixed spare area of 26 MB (being used for storing
the data of other disc parts that have gone defective) is reserved as
a Primary Spare Area (PSA) for AV recording.
DVD-RAM disc provides the same capacity as the nominal capacity of DVD-ROM.
In the case of defects in a bare disc, a
Secondary Spare Area (SSA) can be assigned, up to 200 MB. Thanks to this
defect management system, a defect-free DVDRAM
disc for professional applications can be assured virtually every time.
One of the most interesting features of DVD-RAM is data reliability and
security measures such as rewriting without data-loss, high overwriting
cycle, built-in defect management, and a secure copy protection scheme. In
addition, random accessibility, ending operation free, and 2X-speed
recording are also notable. DVD-RAM provides conceivable
copy protection features such as Media-type Identification, Content
Scrambling System (CSS) Key suppression, Media Unique ID, and
Media Key Block (MKB).
These features enable to implement a Copy Protection for Recordable
Media (CPRM)
5
scheme for the data encryption, which makes DVDRAM
disc a secure digital medium.
A Burst-Cutting Area (BCA) signal can be burned in the innermost area of
a DVD-RAM disc as Media Unique ID. BCA can
number each DVD-RAM disc with a Media Unique serial number for local encryption.
The data format of DVD-RAM is different
from that of DVD-ROM. It has a Header called Complementary Allocated Pit Address
(CAPA), a wobbling, and a land
and groove track. Even if the control data, including CSS key information,
is shift-recorded in a next data recording area, any
drive or player could not read it normally and the shift-recording can be detected
by checking the Header or the wobbling.
It can be concluded that a DVD-RAM disc requires a smaller effort for read
compatibility, and is a reliable, secure,
and random access recorder system.
- Specifications
Panasonic DVD Burner II supports DVD-R and 4.7GB DVD-RAM writing at 2x
CLV. Writing on 2.6GB DVD-RAM media can be achieved at 1x. For the
DVD-RW format, the supported writing speed is the 1x
CLV.
The maximum reading speed for DVD-ROM and DVD Video is 12x CAV for
single layer and 6x CAV for dual layer discs. Last, DVD-R/RW media
are read at 6x CAV.
As for the CD-R media, you can select among the 4x, 8x and 12x CLV writing
speeds, and 4x, 8x CLV writing for CD-RW format. The CD-ROM/-R/-RW reading
speed
is 32x CAV.
The drive is equipped with a 2MB of buffer, and special technology protects
the DVD’s
and CD’s against “buffer underrun errors” during the writing
process. At the
same time the temperature of the medium is measured in order to adapt the
laser intensity accordingly and to ensure an optimal recording result.
The
supported RPCII region control allows the user to change the
region code 5 times.
The supported disc formats are: 4.7GB / 2.6GB DVD-RAM, DVD-ROM (single layer/dual
layer), DVD-R (For General v2,0), DVD-RW (Ver 1.0 & 1.1), CD-ROM Mode 1,
CD-ROM XA Mode 2, Photo CD, CD-DA, CD-Extra, CD-R.
- The package
The
retail package includes one 4.7GB DVD-R disc, one 4.7GB DVD-RAM disc, an
instruction
manual and a driver and application software disc.
This includes the “DVD Movie Album SE 3” software that offers
increased recording and editing functionality for DVD RAM’s and videos
from DV cameras as well as videos from DVD RAM video recorders. It generates
three-dimensional titles with animation and prepares slide shows from still
frame photos. Additional functions such as editing playback sequences (play
lists) or indexing selected scenes (marker function) are also included.
The “MyDVD™ 3.5” works
in co-operation with the ”DVD Movie Album SE 3”, and thus simplifies
the preparation of video DVD’s thanks to well-arranged user guidance.
Authoring video DVD’s/CD’s from AVI data in DV format or from DV
cameras is very easy.
“WinDVD™ 4” is also attached, allowing playback of all
DVD and CD formats. The basic CD/DVD recording software is the “B’s
Recorder GOLD5 BASIC”.
The “FileSafe” application is included for data
back-up purposes. An automatic back-up of defined files in optionally selectable
time intervals is available to the user.
In addition, the package includes
the usual
internal audio cable, mounting screws,
and a forced eject pin.
On the disc loading tray you can see "DVD Multi" and the "HSRW"
logos. The eject button is placed below the tray, on the right side of the
front panel, as usual. The indication LED is active when a disc is loaded
or the
drive performs a read/write task.
On the rear panel there exist the usual connectors, such as the power
input, the ATAPI interface, the device configuration jumper, and the analog
audio
output.
After removing the screws on the bottom we can see the drive's internal
design. Panasonic uses its own chipsets as the following picture shows.
- Installation
Panasonic LF-D521 was identified as "MATSHITA LF-D521" under
WinXP. The drive was installed to the secondary IDE channel of our test PC
as a "Master".
The January 2003 model came with firmware version vA111 installed, which
was used
for all the tests.
In order to have a better idea of the performance of the drive, we include
the results of a different drive in the basic result charts, the Pioneer DVR-A05.
2. Attached Software
Panasonic LF-D521 IDE DVD-RAM - Page 2
The Attached Software
As we have mentioned in the previous page, the software package bulked in
the retail package of the Panasonic LF-D521 includes DVD-RAM drivers for the
latest Windows operating systems, and some other very useful utilities for
performing
several
tasks.
The installation of the driver pack is essential in order to make full use
of the DVD-RAM drive's features.
DVD-RAM drivers allow reading and writing to formatted discs under
the Windows 9X/NT/2k/XP environment.
After installing the driver pack, Windows will recognize the LF-D521 as a
removable drive and you will be able to start
backup your important data with simple drag&drop moves.
- Format software (DVDForm)
You must logically format a DVD-RAM disc before writing files on the disc.
Once you have logically formatted a DVD-RAM disc, it can be used to write files
just as you would do with a
floppy disk or hard disk.
Such
a disc can be formatted using either UDF (Universal Disk Format)
or FAT32 file format. The DVDForm utility allows formatting of DVD-RAM discs.
A user should choose the format appropriate to his own needs. Please note
that you must format 2.8 GB (8 cm) / 5.2 GB / 9.4 GB double-sided DVD-RAM
discs one side at a
time.
-
UDF (Universal Disk Format): UDF has been recently finalized
for the DVD family products. This new format is optimized for big capacity
files, such
as
Video and Audio capture and playback, being able to keep constant, high transfer
rates.
You ca select the UDF 1.5 or the UDF 2.0 formatting modes. Select “Universal
Disk Format (UDF 2.0)” when you are going to use the DVD-RAM
disc to write audio-visual data.
Select this format only if the disc is to be played in a DVD Recorder that
uses the DVD Forum's video
recording standard or with the recording software designed for personal computers
that is based on the
above standard, or if an 8-cm DVD-RAM is to be used in a DVD video camera.
The UDF 1.5 format is appropriate when
you are going to use the DVD-RAM
disc to write PC data.
This format allows the transfer of the data between different operation systems,
such as between Windows and Mac OS*1.
- FAT Format: FAT32 is the Windows OS embedded file system and used
for hard disk drives.
- WPTool
The WPTool
enables you to take full advantage of the characteristics of non-cartridge
DVD-RAM discs. You can perform various tasks such as:
(1) Dust check of DVD-RAM discs!
(2) Write-protect setting/release of DVD-RAM
discs
- Write-Protect Setting for DVD-RAM Disc: With non-cartridge DVD-RAM discs,
you are unable to use the write-protect tab on the cartridge to protect your
data. This software allows you to protect data on non-cartridge DVD-RAM discs.
Once a DVD-RAM disc is set to the write-protected mode, it is valid until this
setting is canceled by this software. This software can only be used with 4.7GB
DVD-RAM/R drive. The Write-protect Setting is not applied to 2.6 GB DVD-RAM
discs.
- Dust Check for DVD-RAM Disc: There are 3 levels of disc dustiness; level
3 is the dustiest. The results should only be used as a guide and should
not be considered a guarantee of the disc's ability to read or write.
After installing the drivers pack, the DVDTool operations are also accessible
by right-clicking
on the DVD-RAM drive in the "My Computer" window of your PC.
3. Data CD Tests
Panasonic
LF-D521 IDE DVD-RAM-
Page 3
Data CD Tests
- Pressed CD results (74min and 80min CD
Speed Graphs)
Panasonic LF-D521 supports 32x CAV CD reading speed.
In our test, the drive reached the 36.73x by the end of the disc, resulting
to an increased average speed of 27.72x. The Pioneer DVR-A05
performed as it was expected and gave an average speed of 24.84x.
According to the specifications of the Panasonic drive, the average seek
time is around 120msec. The drive performed well in all the seek modes. The
Pioneer A05 is slower in the 1/3 and full seek tests.
- CDR Media results (74min and 80min CD
Speed Graphs)
The Panasonic drive was again faster than expected with CD-R
media. The average reading time is 27.8x, while the DVR-A05 improved the average
reading over the previous test speed by 1x.
In the seek test, the results were not different than in the
pressed CD test.
- HS-RW media (Click
to see the CD Speed Graphs)
For the RW tests we used the Plextor HS-RW media.
The LF-D521 started reading at 12.16x and finished at 27.74x, resulting to
20.97x
average speed. The drive supports 28x CAV reading with RW discs. The Pioneer
drive is faster with an average of 25.5x.
4. CD Error Correction Tests
Panasonic
LF-D521 IDE DVD-RAM -
Page 4
CD Error Correction
Tests
In the following tests we examined the error correction capabilities of the
Panasonic LF-D521, when reading an artificially damaged CD-R. For the test
we used the Almedio ABEX pressed discs, and the EAC test disc.
- EAC CD-R Test Disc
The EAC test disc is always hard to read for all the drives we have tested.
The Panasonic LF-D521 reported many errors and some of them were muted. The
number of skipped samples was also high resulting to an overall score of 52.5
points out of 100.
Errors total
|
Num: 115300391
|
Errors (Loudness) dB(A)
|
Num: 582453
|
Avg: -29.0 dB(A)
|
Max: -7.2 dB(A)
|
Error Muting Samples
|
Num: 76691
|
Avg: 1.4 Samples
|
Max: 3584
|
Skips Samples
|
Num: 355
|
Avg: 44.0 Samples
|
Max: 2934 Samples
|
C2 accuracy
|
50%
|
Total Test Result
|
52.5 points (of 100.0 maximum)
|
The C2 accuracy reported is only 50%. We cannot come up with safe conclusions
by this test only, but the first impression is that the Panasonic LF-D521 cannot
retrieve C2 error information accurately.
- ABEX TCD-721R
Errors total
|
Num: 1075712
|
Errors (Loudness) dB(A)
|
Num: 57542
|
Avg: -74.3 dB(A)
|
Max: -14.3 dB(A)
|
Error Muting Samples
|
Num: 3516
|
Avg: 1.1 Samples
|
Max: 95 Samples
|
Skips Samples
|
Num: 1
|
Avg: 6.0 Samples
|
Max: 6 Samples
|
C2 accuracy
|
99.7 %
|
Total Test Result
|
72.9 points (of 100.0 maximum)
|
The score for the Panasonic drive is 72.9, still an average performance. The
total errors were less than in the previous test, as it was expected.
The average level of the Loudness errors is -74.3dB(A).
This time the C2 accuracy reported is high. The ABEX 721R is a pressed test
disc and easy to read, compared to the EAC disc in the previous test.
- ABEX TCD-726
The total amount of errors is smaller in the case of the TCD-726 disc.
The scratches on the disc is not as heavy as in the TCD-721, and the rest
defects and fingerprints
seem not to produce many errors while reading. The Loudness errors were 202
and the average level was -19.6dB(A), which is an acceptable level. Although
only 8 samples were muted, their average length was high. The score
for this test is the best we had for the Panasonic drive. (81.5 points).
Errors total
|
Num: 43819
|
Errors (Loudness) dB(A)
|
Num: 202
|
Avg: -19.6 dB(A)
|
Max: -10.6 dB(A)
|
Error Muting Samples
|
Num: 8
|
Avg: 3275.4 Samples
|
Max: 3584 Samples
|
Skips Samples
|
Num: 0
|
Avg: 0.0 Samples
|
Max: 0 Samples
|
C2 accuracy
|
50.0 %
|
Total Test Result
|
81.5 points (of 100.0 maximum)
|
- Conclusion
Test Disc
|
Reading Speed
|
Score
|
EAC CD-R
|
Max
|
52.5
|
ABEX TCD-721R
|
72.9
|
ABEX TCD-726
|
81.5
|
Average Score
|
68.96
|
Test Disc |
C2 Accuracy |
EAC CD-R |
50% |
ABEX TCD-721R |
99.7% |
ABEX TCD-726 |
50% |
The Panasonic LF-D521 gets an average score of 68.9 points
out of 100 at our CD
error correction tests.
On the other hand, the C2 accuracy seems to be low in most cases.
CDSpeed Advanced DAE quality test
- ABEX 721R
According to the Nero test, the quality score for Panasonic LF-D521
is only 42.3 points, while the C2 accuracy
is rather low (73.43%). The main reason for this result is the increased amount
of compare errors, and the 1562 sync errors that were reported.
5. DVD reading tests
Panasonic
LF-D521 IDE DVD-RAM - Page
5
DVD reading tests
- Test Method
We used Nero CDSpeed to run DVD tests. All tests were performed at least
3 times with the same DVD title (we show the average results). The tests discs
were one single sided, single layer DVD-ROM, one single sided, dual layer
DVD-ROM,
and one disc representing each one of the DVD-R/RW, DVD+R/RW and DVD-RAM formats.
- Single Layer DVD-ROM reading: (Click for
DVDSpeed results )
Panasonic LF-D521 supports a 12x CAV maximum reading speed for the DVD format.
The drive started reading at 5.04x and finished at 12.11x. The average reading
speed is 9.05x. The Pioneer drive was slightly faster in the same test.
The specifications of Panasonic LF-D521 give the drive a 110msec average
seek time for the case of the DVD-ROM format. In our tests the drive was very
fast in all the seek modes. The Pioneer A05 is slower, especially in
the Full stroke test.
- Dual Layer DVD-ROM reading: (Click
for DVDSpeed results)
The drive supports 6x CAV reading speed for the dual layer DVD-ROM discs.
The average reading speed for each layer is 4.5x. The Pioneer uses the same reading
speed as the single-layer DVD-ROM media (8x CAV).
The drive gave good seek times with dual layer media. Compared
to the Pioneer DVR-A05, the Panasonic drive is faster in the Random and Full
stroke tests.
- DVD Ripping Tests
We measured the DVD Ripping speed using the "Matrix" DVD Video
title and DVD Decrypter.
Panasonic LF-D521 ripped the DVD files at an average speed of 5779 kb/sec.
The performance is high, and is translated to a 4x average speed. As most
Pioneer drives, the DVR-A05 is a slower ripper and finished the same task
at around 2750 kb/sec.
- DVD reading Tests
The charts below shows the Nero CDSpeed results with the following media.
In this chart you can see the average reading speeds of Panasonic LF-D521
with 4x DVD-R/+R, 2x DVD-RW, 2.4x DVD+RW and DVD-RAM media. The drive supports
6x CAV average reading speed
for DVD-R/RW and DVD+RW discs. Notice that X equals to
1.38
MB/sec for the DVD format.
With DVD+R media, the drive behaved differently
and accelerated up to 12x, to drop the reading speed by the
end of the disc. The reason is that the drive probably recognized the inserted
disc
as a DVD-ROM!
The supported DVD-RAM reading is 2x CLV.
Panasonic LF-D521 gave the same average speed in the case also of the DVD-R/RW
and DVD+RW discs. As we mentioned, the performance when using DVD+R
media was higher, while the
DVD-RAM itself was read at 2x CLV.
6. DVD Error Correction Tests
Panasonic
LF-D521 IDE DVD-RAM - Page 6
DVD Error Correction
Tests
In the following tests we examined the DVD error correction capabilities of
Panasonic LF-D521. For the tests we used CDVD Benchmark v1.21 and Nero CDSpeed
. The reference test media comes from ALMEDIO.
- Single Layer media
ABEX TDR-821
This is a single sided, single layer DVD-ROM with a 4.7GB capacity, in which
there are scratches with dimensions from 2.6 to 4.8 mm. The following transfer
rate picture comes from CDVD Benchmark v1.21.
Panasonic LF-D521finished the task with no errors. The graph is not interrupted,
meaning that the drive read the disc smoothly and no errors were reported.
Apart from the defected areas, the inserted test disc is a DVD-ROM and was
read at 12x CAV. The performance is
high
prevailing
the drive's advanced
error correction capabilities.
ABEX TDR-825
This is also a single sided, single layer DVD-ROM of a 4.7GB capacity.
The data structure of the disc is exactly the same as that of the TDR-821,
with a single difference
that there are no scratches on it but defected areas with dimensions ranging
from 0.5 to 1.1 mm. There are also fingerprints sized from 6.5 to 7.5
mm.
The drive did not have any problems to read the disc contents. The yellow dots
correspond to the current speed in each area of the disc. No read errors were
reported.
- Dual Layer media
ABEX TDR-841
This is a 8.5GB dual layer, single sided, DVD-ROM disc with artificial scratches
of dimensions ranging from 0.4 to 4.8 mm, in both layers.
The result is very good, as it was expected, judging from the
reading test with the single layer disc. If you compare the two yellow transfer
lines with the one we had in the TDR-821 test, you will see that the drive
showed
a similar good reading behavior in both layers.
The drive read the single layer DVD-ROM at 6x CAV.
ABEX TDR-845
The disc is a single sided, dual layer DVD-ROM disc with a capacity
of 8.5GB. The only difference between the TDR-845 and the TDR-841 is that the
first includes defected areas and fingerprints. The dimensions of the defected
areas are ranged from 0.5 to 1.1 mm and the fingerprints are sized from 0.065
to 0.075 mm.
Again the drive easily overcomes the defected areas and successfully
finishes the reading test.
ABEX TDV-541
The TDV-541 is a single sided, dual layer DVD-VIDEO disc, with
a capacity of 8.5GB. The disc is based upon the TDV-540 series which is designed
for inspection and adjustment of DVD-VIDEO players. The discs check the
layer
switch operation from layer 0 to layer 1 and also include test pictures and
test signals for DVD sound files. The current TDV-541 model checks also
the error
correction capabilities of the drive and includes scratches from 1.8 to 3 mm.
The drive supports 6x CAV average reading speed for the DVD-Video
format. The scratched areas did not make the drive slowdown reading and
no reading problems occurred. The average reading time was 4.50x.
ABEX TDV-545
The TDV-545 disc is based on the TDV-540 series. It is a single
sided, dual layer DVD-VIDEO disc with a capacity of 8.5GB. The TDV-545 includes
artificial black dots on the data surface, sized from 0.8 to 1.0 mm. It has
also 0.065 - 0.075 mm fingerprints.
Black dots and fingerprints were not a problem for the drive.
The test was successful, with a 4.51x average speed.
7. CloneCD Reading Tests
Panasonic
LF-D521 IDE DVD-RAM -
Page 7
CloneCD Reading
Tests
- Procedure
We used CloneCD and 3 original CDs - Serious Sam 2 (SafeDisc 2), V-Rally
2 Expert (SecuROM 2) and NBA Jam Extreme (PSX) - in order
to test the reading time of the drives. We also tested the reading performance
with backups of the original CDs. The following pictures show the drive reading/writing
capabilities as CloneCD reports them:
As you can see the drive is not compatible with the CloneCD
DAO RAW mode.
- PSX Pressed Media
For this test we used the PSX game 'NBA Jam Extreme' and we ripped the image
to the HD using CloneCD. Panasonic LF-D521 needed 75sec to finish the
requested task. The Pioneer drive is slightly faster.
- SafeDisc v.2 Results
The drive needed approximately 14 minutes to create the image file on the
hard disk. The performance is not very high but it can be considered as adequate
for a
DVD
recorder.
The Pioneer DVR-A05 is a slower CloneCD reader and needed approximately 1 hour
to finish the task.
- SecuROM Results
Panasonic LF-D521 can read SubChannel data from Data/Audio tracks. Three
minutes were enough for the drive to make the image file to the hard disk.
8. DAE Tests
Panasonic
LF-D521 IDE DVD-RAM - Page 8
DAE Tests
- DAE features
EAC reports that Panasonic LF-D521 supports "Accurate
Stream", retrieves no "C2" error info and does not support
"caching".
- Pressed AudioCD results
In this test we examine the speed of the DAE of the drive. Panasonic LF-D521
does not support the maximum 32x reading speed for audio ripping.The drive
ripped the audio files at 19.6x average. The Pioneer was faster with a 23.8x
reading speed.
- CDR AudioCD results
With CD-R media, the ripping speed is 19.6x, a little slower than in the
test with the pressed CD.
- EAC Secure Extract Ripping mode
EAC's "secure extract" ripping-mode results, which ensures maximum quality
produced WAV's. Note that for each drive we used the build-in detection function:
Tested Drives
|
Average DAE Speed (X)
|
Pressed
|
CDR
|
Panasonic LF-D521
|
18
|
18.1
|
Pioneer DVR-A05
|
6
|
5.9
|
Under the EAC Secure Ripping Mode, Panasonic LF-D521 finished the task at
an average speed of 18x. The Pioneer drive was slower since it supported "caching"
and secure ripping was tougher and thus, slower.
- Advanced DAE Quality
Panasonic LF-D521 got a 100 score (best) in the Nero CD Speed Advanced DAE
test. The average speed for the drive is 19.49x. The drive can also read data
from SubChannel, CD Text and information from the Leadin area of the disc.
- Ripping of 99mins AudioCD's
Tested drives
|
Ripping up to
|
Panasonic LF-D521
|
97min
|
- Reading/Ripping Protected AudioCD's
For the test procedure we used 2 protected Audio CDs, which we
tested in both recognition and ripping (with EAC) processes:
- Pressed AudioCD with Sony Key2Audio (Celine Dion - New Day Has
Come), and
- Pressed AudioCD with Cactus Data Shield 200 (Natalie Imbruglia
- White Lilies Island).
|
Key2Audio
|
CDS200
|
EAC
|
Panasonic LF-D521
|
OK
|
Pioneer DVR-A05
|
Cannot recognize disc contents
|
Rips entire disc without problems
|
Panasonic LF-D521 can handle both "Key2Audio" and "Cactus Data Shield 200"
protected titles. Ripping was achieved in the maximum supported ripping speed
and the extracted data were absolutely accurate.
9. CDR Tests
Panasonic
LF-D521 IDE DVD-RAM - Page 9
CDR Tests
We tested the drive with latest version of Nero/CloneCD. Panasonic LF-D521
supports the 12x CLV maximum writing speed. The drive is also able to write
at 8x and 4x, as Nero InfoTool reports:
For all the recording tests, we
burned 803MB of data.
The drive finished the burning at 12x speed, at 432 seconds.
The Pioneer DVR-A05 is faster since it supports 16x CLV maximum
writing speed.
The recording times for all the supported speeds are illustrated
in the following chart:
The following screen shot comes from Nero Burning Rom after
a successful burning at 12x.
- Other features
Overburning
|
Up to 99min
|
CD text reading/writing
|
Yes
|
- CloneCD Writing Tests
The CloneCD software reports that the drive does not support the
DAO-RAW feature.
For checking the drive's EFM correction status, we used 3 different game
titles with different SafeDisc 2 versions with the latest software patches
installed. We used the drive as both a reader and writer at maximum reading/recording
speeds. Two discs were burned for each game (Amplify Weak Sectors On/Off).
One disc was burned with PadusDJ and the other with CloneCD (Amplify Weak
Sectors On).
The results are posted in the table
below:
Game Title
|
Tested Drive
|
SD2 Build
|
Settings
|
Amplify Weak Sectors On
|
Amplify Weak Sectors Off
|
Max Payne v1.05
|
Creative 52X
CD-ROM
|
v.2.50.020
|
OK
|
TEAC 40X
CD-ROM
|
BTC DV316
DVD-ROM
|
Serious Sam - The Second Encounter v1.07
|
Creative 52X
CD-ROM
|
v.2.60.052
|
No
|
TEAC 40X
CD-ROM
|
BTC DV316
DVD-ROM
|
The Sims - Unleashed
|
Creative 52X
CD-ROM
|
v2.80.010
|
No
|
TEAC 40X
CD-ROM
|
BTC DV316
DVD-ROM
|
10. CDR Writing Quality Tests
Panasonic
LF-D521 IDE DVD-RAM -
Page 10
Writing Quality Tests
We used Taiyo Yuden 80min 48x CD-R media and burned the same AudioCD project
(with CD-Text) at all available recording speeds ranging from 4x-12x. Below
you can see the 3T
Pit & Land Jitter graphs.
- 3T Pit results
As we can see from the above graphs, the 3T Pit Jitter stays below the 35ns
RED book limit for all the available recording speeds. The low writing
speeds, along with the implemented CLV strategy, ensure that the quality of
your CD-R compilations will be high.
The average 3T Jitter values for all recording speeds are illustrated in the
following table.
The 12x writing speeds gave the highest average jitter values. The average
value of jitter is less than 35nsec for all the recording speeds. We
could say
that you can safely burn your favorite audio discs in any available speed.
- 3T Land results
The average 3T Land results are slightly increased over those in the previous
measurements of the 3T Pit Jitter. The maximum jitter values reported were
30ns, and come
from the measurements on a recorded disc at 4x.
- Conclusion
Recording Speed |
3T Pit Jitter (ns) |
3T Land Jitter (ns) |
> 35ns |
Max value (ns) |
4X |
24.44 |
27.39 |
No |
27 Pit, 30 Land |
8X |
24.54 |
24.24 |
No |
26 Pit, 24 Land |
12X |
28.17 |
27.34 |
No |
32 Pit, 30 Land |
The average 3T Pit and Land jitter values are below the 35nsec standard for
all the recording speeds. The 12x recorded discs gave some slightly increased
error values, but certainly they cannot influence the overall quality. The
combination of low writing speeds and the CLV writing technology seems to
guarantee the
quality
results.
11. HS-RW Writing Tests
Panasonic
LF-D521 IDE DVD-RAM -
Page
11
HS-RW Writing Tests
We used Nero Burning Rom for writing CDs in the maximum RW speed supported
by the Panasonic LF-D521. The drive supports 8x maximum rewriting speed.
The Panasonic LF-D521 finished in 9:50 minutes, and needed just 29 seconds
to perform the "quick erase" task under Nero. The DVR-A05 is slightly
slower needing 9:57sec.
- Packet Writing Tests
We used InCD and Plextor HS-RW media for all Packet Writing tests. The formatting
of the media takes around 10min. The formatted disc had 530mbs of free space.
We copied a 403 MB file (403.147 kbps) from a Hard Disk (on the same PC as
the writers) to the formatted RW media, using explorer (we dragged and dropped).
We
completed the test twice to eliminate possible time measurement faults and
user handling errors:
In the writing part, both Panasonic and Pioneer drives gave the same average
writing speed, around 5.6x. The reading task was faster for the Panasonic
LF-D521, finishing at a 7.68x reading speed.
12. DVD Recording Tests
Panasonic
LF-D521 IDE DVD-RAM - Page 12
DVD Recording Tests
- Writing Performance
Panasonic LF-D521 supports 2x CLV writing when using 4.7GB DVD-RAM
discs and 1x in the case of 2.6GB media. It is very interesting the fact that
data verification and sector management is carried out during the data
writing process. Although
the process maintains highly reliable data write, preventing data loss due
to scratches, dust etc, the overall writing time is increased. Our tests
using "Nero
burning Rom" showed that the total recording time for 4.316GB of data was 58:52min,
which is equal to 1x writing:
In order to achieve lower writing times, you should use the "B's
Gold5" software
bundled in the Panasonic retail package. The software allows the user to disable
the verification function and increases the recording speed to x2. (26:38min
in our case).
In the following screenshot you can see the B's Gold5 recording properties
window where you can disable the verification function:
As we mentioned, without verification the recording process lasted 26:38min:
We also burned 4.316GB of data using the Panasonic LF-D521
drive and Pioneer 4x DVD-R and 2x DVD-RW media. The results are listed in
the following
table:
DVD Recording Tests |
Drives |
Media |
Writing Speed |
Average Writing Time (min) |
Panasonic LF-D521 |
DVD-R |
2x |
29:18 |
DVD-RW |
1x |
58:31 |
DVD-RAM |
2x (No verification) |
58:52 |
2x (With Verification) |
26:38 |
Pioneer DVR-A05 |
DVD-R |
2x |
28:21 |
DVD-RW |
1x |
56:23 |
The following pictures come from Nero, after successful DVD-RW and DVD-R
burnings. The amount of data is the same for all the tests.
- DVD-R
- DVD-RW
- Drag & Drop writing
After formatting a DVD-RAM disc under the UDF 1.5 mode, the available free
space
on the disc is 4.26GB:
We drag & drop
4.21GB from HD to the DVD-RAM media. The drive needed 1:02:15 to complete the
tests, which equals to 0.9x writing.
13. Conclusion
Panasonic
LF-D521 IDE DVD-RAM - Page 13
Conclusion
Positive
(+)
|
Negative
(-)
|
- Supports 2x 4.7GB DVD-R / DVD-RAM writing
- High reliability of DVD-RAM
- Built-in Defect Management
- Complete retail package interface
- Attached software utilities
- Fast CD-R/ROM/DVD reading
- Low CD/DVD seek times
- Supports reading of all DVD recordable discs
- High DVD Video ripping speed
- High error correction performance with DVD format
discs
- High CD-R writing quality
- Supports Drag & Drop writing
- Overburning
- Supports CD-Text (reading/writing)
- Supports 99min discs
- Supports Audio Protected discs
|
- 1x DVD-RW writing speed
- Average CD error correction capabilities
- Cannot create working backups of latest SafeDisc
v.2 builds
- DAE speed could be higher
- High media price
- DVD-RAM incompatible with most stand alone DVD players
|
Panasonic DVD Burner II is definitely improved over the previous Panasonic
DVD-RAM series. It supports writing of DVD-R /RAM media at 2x recording speed
(equivalent to 18x CD rate). This means that you can write up to 4.7GB in less
than 30 minutes.
The DVD-RAM format can be used for both computer and consumer electronic
applications, providing a solution for home video, personal computing and data
archiving needs. The provided storage capacities start from 650MB (CD-R) and
reach the 9.4GB on DVD-RAM media. In addition, the DVD-RAM offers robust
data management
and a very high number of erasing cycles per medium that reaches the range
of the 100,000 times.
The DVD-RAM physical structure allows a user to format the DVD-RAM disc and
use it as a large floppy disc. The attached software utilities make this procedure
very easy allowing formatting under either UDF or FAT modes. After formatting,
simple drag&drop movements through your Windows environment are enough to
have a fast and reliable archive of your data.
The retail package includes all the necessary software for CD and DVD recording,
video authoring, DVD Video playback and other useful operations such as DVD-RAM
physical condition testing and securing the DVD-RAM contents. All this
is offered under an easy integration of the DVD-RAM features into
the Windows environment.
In the reading part, the drive is fast and supports 12x CAV speed for the
DVD-ROM, while the access times are also low. What is very important is the
drive's high performance in the DVD error correction tests with the ABEX
discs. No
errors occurred in the reading process with single and dual layer media. In
addition, the drive is able to read DVD+R/+RW discs. The attainable
DVD ripping speed is also high.
Concerning the CD format, the drive offers 12x CD-R recording speed, 8x
rewriting and 32x reading. The supported DAE speed is less than 32x and this
could also be
improved. Reading of subchannel data and CD-Text is available, and the CD-R
writing quality is high. Protected audio discs are easily handled by the drive
and can be read accurately. On the other hand, we consider the lack of the
DAO RAW writing mode as a negative point, along with the average error correction
capabilities for CD-R discs.
The Panasonic LF-D521 left us a positive overall impression. This is mainly
due to the fact that the drive fulfills the needs for both reliable DVD
recording and easy handling of AV applications. The
suggested retail price is expected to be around £200. What
we could think as a weakness of the DVD-RAM format is the limited DVD player
support and the increased price of the DVD-RAM media.