1. Package - Installation
Memorex
DVD±RW True-8x -
Page 1
Memorex
is a well-known supplier of storage and multimedia solutions. The True 8X Dual
Format DVD is the company's latest DVD writer
and supports both +R and -R formats at the maximum speed
of 8x.
- Features
Buffer Memory: Equipped with
2MB buffer memory, virtually eliminating buffer underruns
and preventing loss
of time and media.
Smart-Burn Buffer Underrun Protection: Comprehensive
Buffer
Underrun Management system which monitors and adapts Recording Technology
for
burnings.
Precision Recording Technology: claimed to offer
good overwrite performance,
significantly supporting more advanced technology.
Defect Management: This drive features the DRT-DM (Distributed
Real Time Defect
Management) system, offering the higher reliability for recorded
discs.
Vibration Absorber System (VAS): Imbalanced discs can cause
vibrations that affect
performance during high-speed recording and playback. VAS is designed
to the resonance
frequency of the drive rotating speed. The vibration will be inducted
into the absorber to get the minimum vibration.
Smart-X Function: technology adjusts CD-DA/VCD
data extraction to the fastest
allowable speed according to both data request rates from host and
disc quality.
Interface
|
ATA/ATAPI-5 |
IDE Data
Transfer Mode PIO Mode 4, Multi Word DMA Mode 2, Ultra DMA Mode 2 |
Buffer
Size
|
|
2MB |
Write
Speed
|
DVD-R |
8X Z-CLV |
|
DVD-RW |
4X
CLV |
|
DVD+R |
8X Z-CLV |
|
DVD+RW |
4X
CLV |
|
CD-R |
24X Z-CLV |
|
CD-RW |
24X Z-CLV |
Read
Speed
|
DVD-ROM (Single) |
12X CAV |
|
DVD-ROM (Dual layer) |
8.0X CAV |
|
DVD-R (4X media) |
8.0X CAV |
|
DVD+R/+RW |
8.0X CAV |
|
DVD-RAM |
2.0X CLV |
|
DVD-Video (Single) |
5X CAV |
|
DVD-Video (Dual) |
5X CAV |
|
CD-ROM/-R |
40X CAV |
|
CD-RW |
32X CAV |
|
CD-DA (DAE) |
40X CAV |
|
Video CD |
4.0X CLV |
|
8cm CD (with Adapter) |
6.2X CAV |
Disc
Format
|
|
DVD single layer/Dual
layer
DVD-R (Ver.1.0 for authoring 3.95GB & Ver.2.0 for authoring 4.7GB and
general 4.7GB; But in case of write, General disc only.)
DVD-RW (Ver.1.0 &1.1)
DVD+R (Ver.1.0 & Ver.1.1)
DVD+RW (Ver.1.2)
DVD-RAM (Ver.2.0 & Ver.2.1)
CD-ROM Mode 1
CD-ROM XA Mode2 (form 1, form2) Video CD
Photo CD (single and multiple session)
CD-DA
CD-R
CD-RW (Supports AM2, Supports High Speed CD-RW, Support Ultra Speed CD-RW)
CD-Text |
Write
Format
|
|
DVD-R: Disc at
Once, Incremental recording, Multi-border recording
DVD-RW: Restricted Overwriting
DVD+R: Incremental recording,
DVD+RW: Random recording
CD-R and CD-RW: Disc at Once, Track at Once, Session at Once, Packet
write
|
Random
Seek Time
|
|
DVD (-R/RW)(+R/RW):
130 msec
DVD-RAM: 140 msec
CD: 120 msec |
The drive uses a 2MB buffer memory. The RAW DAO 96 writing (CD) is supported
while Mount Rainier is not.
Memorex uses the RPC II region control, allowing
a user to change the drive's region at most 5 times. For our tests, we set
the region
code to 2 (Europe).
- Retail package
All
software and hardware parts, except
from the writer are bundled in a smaller box inside the retail package.
That box contains a Memorex blank DVD+R disc,
an IDE cable, an audio cable, mounting screws, a quick setup map and a very
detailed
installation manual among with an extended Nero Vision Express guide.
On the software part includes Nero Express Software Suite
• Nero Express 6
• NeroVision Express 2
• InCD
• Nero BackItUp
• Nero ShowTime
• Nero Cover Designer
• Nero Recode 2
• Nero Media Player
- The drive
The drive's front panel is colored black while the loading tray is gray.
On the tray you can see the CD-RW, DVD+R/R, DVD-R/RW and Memorex logos,
from right to left. Below the tray door, on the right is the eject button and
next
to
it two ventilation holes.Next to them is the busy led indicator and finally
the emergency eject hole is placed on the left side.
On the rear panel there are
the analogue audio outputs, the IDE connector
and the power input.
Removing the screws and opening the drive's cover voids the drive's warranty.
For reference reasons, we post the following pictures. The comparison with
the Pioneer DVR-10D is unavoidable.
- Installation
The Memorex drive was connected to our test PC and was identified
as "Memorex DVD+/-RW True-8x" under
WinXP. All tests were done with firmware v1.06.
The following pages include the test results of the Memorex drive in comparison
to two other dual DVD burners, the Pioneer-107D and the Nec-2500A
2. Data CD Reading Tests
Memorex
DVD±RW
True-8x - Page 2
Data CD Reading Tests
- Pressed CD results (Click for
CDSpeed results)
The reading speed of Memorex True-8x is 40x for the cd media, according
to the manufacturer. This was confirmed after the end of the reading
process. The
software
we used, Nero CDSpeed v2.11, reported 31.66x average reading speed and
41.91x ending speed. The pressed disc was read accurately, under CAV mode.
The above results were taken from the reading process of a pressed disc.
The graph shows the seek times of Memorex True-8x in comparison with Pioneer
and
Nec. Memorex and Pioneer returned similar results regarding Random and 1/3
seek times, while both drives needed more time than Nec to finish the Full
seek test.
- CD-R Media results (Click for
CDSpeed results)
In order to present the reading strategy of Memorex True-8x with CD-R
media, we made a copy of the previous pressed disc and we run it using NeroCDSpeed.
The software reported that the disc was once again read
under CAV mode , at the ending speed of 42.3x. From the graph we can conclude
that all three drives are almost equal on the reading process of a CD-R media.
Memorex True-8x and Pioneer DVR-107D were slower than Nec ND-2500A in all
three modes of the Seek times test. The
result
was predictable, since both drives returned high Full seek times with the
previous tested pressed disc. For the CD-R disc, Memorex and
Pioneer needed 300 and 301ms respectively to finish the Full seek test.
- ReWritable Media (Click for
CDSpeed results)
For the rewritable reading test we used 32x High Speed rewritable media from
Mitsubishi Chemicals.
Memorex read all test CD's under CAV mode including the RW media.
The US-RW media from MC was read faster by Nec ND-2500A reporting 34.66x ending
speed, while Memorex and Pioneer returned 33.79x and 33.66x
ending speeds respectively.
3. CD Error Correction Tests
Memorex
DVD±RW
True-8x-
Page 3
Error Correction Tests
In the following tests we check the drive's behavior when reading
scratched / defective audio discs. The test discs are the ABEX series
from ALMEDIO.
- ABEX TCD-721R
Errors total
|
Num:
1114555
|
Errors (Loudness) dB(A)
|
Num:
54122
|
Avg:
-73.7 dB(A)
|
Max:-34.9
dB(A)
|
Error Muting Samples
|
Num:
3512
|
Avg:
1.1 Samples
|
Max:
40 Samples
|
Skips Samples
|
Num:
0
|
Avg:
0 Samples
|
Max:
0 Samples
|
Total Test Result
|
76.6 points (out of 100.0 maximum)
|
Memorex proved to be a stable drive on the CD error correction tests. Although
Abex 721R test disc is hard to be read by most drives, both Memorex and Pioneer
returned very good scores, 76.6 and 76.4 respectively. As far
as
it
concerns Nec, Almedio awarded the drive with 65.0 points on the part of the 721R
CD error
correction
test.
- ABEX TCD-726
Errors total
|
Num:
231
|
Errors (Loudness) dB(A)
|
Num:12
|
Avg:-57.8
dB(A)
|
Max:
-50.4 dB(A)
|
Error Muting Samples
|
Num:
0
|
Avg: 0
Samples
|
Max:
0 Samples
|
Skips Samples
|
Num:
0
|
Avg:
0 Samples
|
Max:
0 Samples
|
Total Test Result
|
93.5
points (out of 100.0 maximum)
|
The 726 Abex test disc is easier to be read by most drives. The total score
of Memorex for this test is 93.5 points out of 100. During
the test, no errors such as muted or skipped sequences were reported and only
the -57.8dB(A) noise spike was reported. The total errors pending
the reading
process
were only
231.
- CD-Check Audio Test Disc
The CD-Check Test Disc is a very useful tool for evaluating the Sound Reproduction
/ Error correction capabilities of a CD player. The disc offers a signal combination
with disc error patterns to rate the drive's abilities in sound reading and
reproduction. Five tracks on the disc contain a sequence of progressive difficulty
tests. These tracks are referred to as Check Level-1 through Check Level-5.
The
tracks are reproduced (played) through Winamp, Windows Media Player and
Power DVD. Each level is considered as passed, if the tone reproduced
from the speakers is smooth, continuous without interruptions, skipping or
looping. The higher the Check Level passed, the more reliable the sound reproduction
of the tested drive.
Error Level
|
1
|
2
|
3
|
4
|
5
|
Memorex
DVD+/-RW True-8x
|
5/5
|
5/5
|
5/5
|
5/5
|
1/5
|
The drive successfully passed the first 4 check levels for this test. During
the playback of the fifth level the sound of the track playback was smooth
not more than one time. We repeat the test four more times and only one click
was audible.
That click was enough to consider that the drive failed on the that
level.
- Summary
Test Disc
|
Reading Speed
|
Score
|
ABEX TCD-721R
|
Max
|
76.6
|
ABEX TCD-726
|
93.5
|
Average Score
|
85.05
|
The average score of Abex tests is 85.05 points for the
Memorex True-8x. The average score of Pioneer DVR-107D was 83.25 while
Nec returned only 73.1 out of 100.
4. DVD reading tests
Memorex
DVD±RW
True-8x-
Page 4
DVD reading tests
- Single Layer DVD-ROM (Click
for CDSpeed results)
The reading strategy of Memorex True-8x is CAV for single layer DVD-ROM
media. The disc was read accurately reporting an average speed of 9.46x. The
above graph shows that Memorex and Pioneer gave back almost the same results
in all
three reported speeds.
Just like CD media seek times, here too the seek times of single layer DVD-ROM
needs a lot of improvement. For Full seek, Memorex needed 308ms and this value
is much higher in comparison with the 178ms of Nec's. The results returned
for Random and 1/3
modes are acceptable but higher than Nec's values.
- Dual Layer PTP DVD-ROM (Click
for CDSpeed results)
The two layers of a PTP DVD-ROM disc are read sequentially with the drive
starting the read process from the inner tracks of the disc, which is the beginning
of each layer,
and progressing outwards towards to the outer tracks for each layer.
On the Dual layer DVD-ROM reading test both Pioneer and Memorex gave back
faster average reading speed values than Nec ND-2500A. Memorex reading strategy
was CAV and
the drive reached the maximum reading speed of 8.45x at the end of the test.
As expected from the single layer DVD-ROM, Memorex True-8x returned level
Full seek times that overrun the acceptable level. The drive needed 305ms for
Full seek, 132ms for Random seek and 157ms for 1/3 seek. On the seek times
test
of Dual
layer
DVD-ROM, Nec gave back the fastest access times in Full and 1/3 mode while
on Random seek, Memorex proved to be the fastest.
- Dual Layer OTP DVD-ROM
The
first layer of an OTP dual layer DVD-ROM is read in the exact way
as the first layer of the PTP disc we tested previously. The difference here
is
the
reading strategy
of the second layer on 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
inwards towards the inner tracks of the disc.
Dual layer OTP written disc was read by Memorex with and reported
6.28x average speed. The starting speed at the begriming of second layer
was 8.37x. The above screen shot was taken from NeroCDSpeed indicating
that the
disc
was read accurately, under CAV mode. The access times of Memorex with
Dual layer OTP are 306ms for Full seek, 136ms for Random and
158ms for the 1/3 seek
test.
- DVD Ripping Tests
We measured the DVD-Video ripping speed of the Memorex True-8x using the
latest version of DVD Decrypter. The DVD Video title is the "Matrix" pressed
DVD-Video.
On the above graph we can see that the Nec is the fastest among the three
drives on the DVD ripping test. The results of Memorex and Pioneer are similar
with average ripping speed about 4.3x
- DVD Recordable / Rewritable reading Tests
The chart below shows the Nero CDSpeed average reading speed results with
the following media.
All recordable / rewritable media tested were read under CAV mode by Memorex
True-8x. On the plus DVD format the rewritable media
was read faster than the recordable while on the minus format both recordable
and rewritable media gave back alike average reading speed.
- DVD RAM reading test
According
to manufacturer Memorex True-8x supports DVD-RAM reading. To test the reading
performance of Memorex we used NeroCDSpeed and Maxell DVD-RAM certified at
3x.
The disc was readen under CLV mode with average reading speed 1.98x. Again,
the Full seek times are increased.
5. DVD Error Correction Tests
Memorex
DVD±RW
True-8x -
Page 5
DVD Error Correction
Tests
In the following
tests we examined the DVD reading capabilities of Memorex DVD+/-RW
True-8x
with
scratched / defective DVD media. For the tests we used CDVD
Benchmark and Nero CDSpeed. The testing media
come
from
ALMEDIO.
- Single Layer media
ABEX TDR-821
This is a single sided, single layer DVD-ROM with a 4.7GB capacity, and its
surface has an artificial scratch of dimensions varying from 0.4 to 3.0 mm.
The following transfer rate picture comes from the CDVD Benchmark v1.21 transfer
rate test.
The drive managed to read the disc accurately without any read errors. As
shown on the above graph the drive reached the 13x maximum reading speed at
the end
of the single layer disc.
ABEX TDR-825
This is also a single sided, single layer DVD-ROM of 4.7GB capacity. The
data structure of the disc is exactly the same as that of the TDR-821, with
the difference that there are no scratches on the surface but defective areas
ranging in dimensions from 0.5 to 1.1 mm. There are also fingerprints with
height
between
65 and
75 micrometers.
Memorex managed to read Abex TDR-825 test without any errors. The drive
passed the effective areas with high accuracy, but when the reading process
reached the fingerprints area at the 1.450.000th sector, the
reading speed decreased from 11x to 5x. The drive maintained that reading speed
until the
end of
the effected
area and increased it again when it passed it.
- Dual Layer media
ABEX TDR-841
This is an 8.5GB dual layer, single sided DVD-ROM disc with artificial scratches
of dimensions ranging from 0.4 to 3.0mm, on both layers.
Memorex True-8x once again performed well and managed to finish the test
without posting any errors. The drive reached maximum reading speed 8.6x,
at the end of each layer.
ABEX TDR-845
This disc is a single sided, dual layer DVD-ROM disc with capacity of 8.5GB.
The only difference between the TDR-845 and the TDR-841 is that the first includes
both defective areas and fingerprints. The dimensions of the defective areas
range from 0.5 to 1.1 mm and the fingerprints have height sized from 65
to 75 microns (micrometres).
On the previous tested Abex 825 TDR test disc, Memorex needed to slow down
it's reading speed while on the fingerprints area, in order to finish the reading
test without
errors. On this test despite the fact that fingerprints and defected areas
have exactly the same dimension, with the 825 test disc the drive managed to
read accurately the two layers and passed both
effective
areas and fingerprints without slowing down the speed.
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 on the TDV-540 series which is designed for inspection
and adjustment of DVD-VIDEO players. The disc checks the layer switch operation
from layers 0 to 1 and also includes test pictures and test signals for
DVD sound files. The current TDV-541 also checks the error correcting
capabilities of the drive and includes scratches sized from 0.4 to 3.0 mm.
The dual layer 541 DVD-ROM was read under CAV mode. NeroCD Speed reported
high Full seek times, something that seems to be a characteristic of the drive,
with Full seek returning 309ms. However the graph above shows a perfect result
without reading problems when switching from layer 0 to 1.
After the test ended the reported average speed was 6.33x.
ABEX TDV-545
The
TDV-545 disc is based on the TDV-540 series. It is a single sided, dual layer
Video/S-2 disc with a capacity of 8.5GB. The TDV-545 includes artificial
black dots on the disc's surface, sized from 0.4 to 1.0 mm. It also has 65
- 75 micrometres high fingerprints.
Once again the reading test ended without read errors. NeroCDSpeed
reported CAV mode for reading strategy, high Full seek times and average speed
at 6.34x.
6. Protected Disc Tests
Memorex
DVD±RW
True-8x -
Page 6
Protected Disc
Tests
- Reading Tests
To create an image of the various protected titles onto the hard disk,
we used CloneCD v.4.3.1.9 software and the appropriate settings, depending
on
the protection type of the inserted discs. Below the capabilities
of Memorex are summarized, according to CloneCD
software. Notice that the drive supports writing of CD+G under RAW DAO:
The game titles we used for testing the image creation speed for each protection
scheme are given in the
table below:
Game Title
|
Protection Scheme
|
PSX "NBA Jam Extreme" |
Lybcrypt |
Serious Sam The Second Encounter v1.07 |
SafeDisc v.2.60.052 |
Fifa 2004
|
SafeDisc v3.10
|
VRally II |
SecuROM v.2 |
PSX Pressed Media
SafeDisc v.2
SecuROM v.2
Memorex proved to be a fast backup device for PSX games although Nec was
faster. In addition, regarding the Safedisc protected game, Memorex drive
needed 33:57
minutes to finish the ripping process. Although this is not the slowest ripping
speed we have experienced, the other two drives returned faster ripping
speed values. From the above graph we can conclude that Nec was the fastest
drive among the three devices
of
the roundup
while
Pioneer
speed
is resembling to Memorex. With the Securom protected disc both Memorex and
Pioneer gave back the exact same ripping speed, faster
than Nec.
- Writing Tests
The Memorex True-8x supports the DAO-RAW writing mode.
For checking the drive's EFM correction status, we used 4 different game titles
with different SafeDisc 2 and SafeDisc 3 versions having the latest software
patches installed. After making the images of the various titles to the hard
disk,
we burned them
(maximum speed) using CloneCD. Two different discs were created for each
title; one with the "Amplify Weak Sectors" enabled and one more with
the
function disabled.
The table below shows the results of the attempted backups and whether
they ran (game installed / played normally), or not.
Drive |
Game Title |
SafeDisc Build |
Settings |
Amplify Weak Sectors On |
Amplify Weak Sectors Off |
Memorex True-8x |
Max Payne |
v2.51.020 |
Yes |
Yes |
Serious Sam - The Second Encounter
v1.07
|
v.2.60.052 |
No
|
No
|
The Sims Unleashed |
v.2.8 |
No
|
No
|
The Sims Superstar |
v2.9 |
No
|
No
|
Fifa 2004
|
v3.10
|
No
|
No
|
Memorex True-8x is surely not a good backup device for protected games.
After the end of the writing process the only game that was playable was
Max Payne protected with Safedisc v2.51.020. The drive made invalid copies
of
all other games we tested either with CloneCd Amplify Weak Sectors
on or off.
7. DAE Tests
Memorex
DVD±RW
True-8x -
Page 7
DAE Tests
- Pressed and CDR AudioCD results
Memorex supports the CAV reading strategy for DAE discs, while the maximum
DAE
reading speed is 40x. These specifications were confirmed by Nero CDSpeed.
Nero
CDSpeed reports that the reading process of Audio disc started at 18.07 and
ended at 41.29x under CAV strategy. Just like
the data pressed discs we tested before, the software reported high seek
times with Full seek at 282ms.The resultant graph also shows some undulations
during reading.
In order to test the average ripping speed of Audio CDs with Memorex, we
used a pressed Audio disc and a clone of it, on a CDR media.
The average ripping speeds of Memorex with both pressed and
CDR Audio were similar. From the above graphs we
can
conclude
that Memorex and Pioneer ripping speeds are similar on CDR Audio disc, and
as for the pressed disc Memorex returned faster average DAE speed. Nec
was slower
on both pressed and CDR media.
- Advanced DAE Quality
Nero CDSpeed Advanced DAE Quality test returned quality score 100(perfect)
for Memorex and confirms that the drive can be safely
used for On The Fly Copying. On the advanced features tab, the software reports
that Memorex reads CD Text and Subchannel Data but is not able to read
Leadin and Leadout area information.
- Support of 90/99mins AudioCDs
The Memorex drive managed to rip the contents of our 90/99min test discs
successfully.
- Reading/Ripping Protected AudioCDs
For the test procedure we used two audio discs with different
audio protection schemes. We conducted the test for both recognition and
ripping to the hard disk. The software used was Exact Audio Copy.
* Pressed Audio disc protected by Sony Key2Audio (Celine
Dion - New Day
Has Come)
* Pressed Audio disc protected by Cactus Data Shield 200 (Natalie
Imbruglia - White Lilies Island)
|
Key2Audio |
CDS200 |
EAC |
Memorex True-8x
|
OK
|
Recognize the disc but cannot
rip or play the contents
|
Pioneer DVR-RW DVR-107D
|
NO
|
Recognize the disc but cannot rip
or play the contents
|
NEC ND-2500A
|
OK
|
OK
|
On the above table we summarized the results of all three drives of the roundup.
Only Nec managed to read and rip the contents of both protected discs.
Memorex had no problem with the Key2Audio
disc while CDS200 tested disc could
not be ripped or playbacked.
8. CD Recording Tests
Memorex
DVD±RW
True-8x - Page
8
CD Recording Tests
- CD-R Writing Tests
Memorex supports
4X , 8X ,16X CLV and 24X maximum writing speeds. At all speeds
the writing method is Z-CLV. Below you can see the CDSpeed writing simulation
graph with Taiyo Yuden 48x CD-R media.
The
characteristic of Z-CLV is a series of zones that look like steps, each one
reaching closer to the maximum speed of the drive. When the maximum speed is
reached, the drive speed levels off and remains constant until the end. According
to the graph, Memorex True-8x started the writing process at 15.90x. The speed
was increased at the 10min of the disc to 20.5x and was kept constant until
the 19min. On the final step the speed was increased again to 24x until
the end of the process.
- Recording Times
We created an 80min data compilation with Nero Burning Rom and recorded it
on a 700MB disc. Both Memorex and Pioneer support 24x writing under Z-CLV
and therefore the time both drives needed to complete the writing task
is
similar. Nec was
about one minute faster because it supports 32x maximum
writing.
Below are the best writing times at all available writing speeds of all
three drives. The graph shows that Memorex and Pioneer finished each writing
process at almost the same time while Nec was faster in all speeds.
In the following graph you can see the recording times with
various media brands. All tested media were written at the maximum allowed
speed which means very good media compatibility.
- CD-RW Writing Tests
The
Memorex True-8x supports 10x,
16x, 20x and 24X rewriting speeds
with Ultra Speed rewritable media. Below
you can see the results from the CDSpeed writing simulation test with blank
24x US-RW media from Mitsubishi Chemicals.
The test confirmed the drives specifications for 24x rewriting. The simulation
process started at 16.01x and finished at 24.42x resulting the average speed
of 22.33x. The drive reached
the maximum 24x writing speed at the 19th minute of the disc and as Nero CdSpeed
confirms the writing strategy is Z-CLV.
In order to provide a comparison of the three drives when writing on HS-RW
media, we used Nero Burning Rom software to burn a 651MB data compilation
using
24x US-RW media from Mitsubishi Chemicals. Both Memorex and Pioneer support
24x rewriting speed and finished the writing process at exactly the same time,
6:01min, while Nec was 70sec slower due to the fact that it supports 16x max
rewriting speed. On the quick erase test , Memorex proved to be 4sec faster
than
Pioneer.
- Packet Writing Tests
For the packet writing test we used the InCD packet writing software from
Nero and Mitsubishi Chemicals 24x US-RW media. The test file was a 403 MB
file
(412.822 KB) and we used the drag and drop method from Windows Explorer to
write the file from our hard disk to the RW media. Memorex was faster on the
writing process with 16.4x average speed, while the read process average speed
reported was 13.7x.
Operation
|
Duration
|
Average speed
|
Read
|
3:20 min
|
13.7 X
|
Write
|
2:48 min
|
16.4 X
|
- Other features
Overburning
|
Does not support
|
CD text reading/writing
|
Yes
|
9. Writing quality - 3T Jitter Tests
Memorex
DVD±RW
True-8x -
Page 9
Writing Quality Tests - 3T Jitter Tests
In order to test the writing quality of the written discs with Memorex True-8x
we summarize the 3T
Pit & Land Jitter of the written discs in the following graphs.
- 3T Pit results
Memorex proved to be a qualitative writer on all tested CD-R media. None
of the discs exceeded the 35ns Red Book limitation, as it shown on the above
graph.
The highest Pit value (32ns) comes from the Ritek media at the beginning of
its surface while the most stable measurements were indicated with the Fuji
media.
The average
3T Pit Jitter values for all recording speeds are illustrated in the following
graph.
On the above graph the average Pit Jitter of
each media is presented. Memorex and TY media returned the highest average
values but these values are lower than the 35ns Red Book limitation. This means
that
the
specific
media can safely be used for quality writing. On the other hand MAM and Fuji
gave back low average Pit Jitter, 23.05 and 23.98 respectively.
- 3T Land results
Just like the previous Pit values measurements, the Ritek disc gave back
the highest Land Jitter value, 35ns, while the Fuji disc gave the most
stable
measurements. None of the written discs exceeded the 35ns Red Book limitation.
The following average graph confirms the low levels.
The
average Land Jitter values for all written discs were good. The highest average
values were indicated with Memorex, written at 24x, while the lowest comes
from Fuji.
Recording Speed
|
Average 3T Pit Jitter (ns)
|
Average 3T Land Jitter (ns)
|
> 35ns
|
Max 3T jitter values (ns)
|
TY 48x
|
27.10
|
27.54 |
No
|
31 Pit,31 Land |
TDK Printable 48x
|
24.37
|
24.83 |
No
|
29 Pit, 28 Land |
Fuji 52x
|
23.05
|
23.90 |
No
|
25 Pit, 25 Land |
MAM Golden Dye 52x
|
23.98
|
25.73 |
No
|
33 Pit, 35 Land |
Memorex 52x
|
27.44
|
28.05 |
No
|
30 Pit, 30
Land |
Ritek Mutlispeed
|
25.32
|
26.83 |
No
|
30 Pit, 30 Land |
10. C1 / C2 Error Measurements
Memorex
DVD±RW
True-8x -
Page 10
Writing Quality Tests - C1 / C2 Error Measurements
We measured the C1 / C2 error rate for the media burned
during the previous writing tests (jitter). The software used was UMDoctor
Pro II,
and the reader the Optorite DD0203 drive.
- Taiyo Yuden 48x recorded at 8x
- Taiyo Yuden 48x recorded at 16x
- Taiyo Yuden 48x recorded at 20x
- Taiyo Yuden 48x recorded at 24x
Below is presented information on the CD-R media used in this test.
Disc
|
ID Code
|
Taiyo Yuden 48X |
TaiyoYuden 97m24s01f |
TDK Printable 48x |
TDK Corporation 97m15s 5f |
FUJI 52X |
Fuji Photo Film Co., Ltd.
97m26s45f |
MAM Golden Dye 52x |
Mitsui Chemicals, Inc.97m27s58f |
Memorex 52x |
CMC Magnetics Corporation 97m26s66f |
Ritek Mutlispeed |
Ritek Co .97m15s17f |
- Summary
The C1C2 values of all written discs with the Memorex True-8x drive are very
good. None of the above tested media gave back C2 errors and all C1 values
are in low levels. This proves that all discs were written in good quality.
11. DVD Recording Tests
Memorex
DVD±RW
True-8x -
Page 11
DVD Recording Tests
- Writing Performance
Memorex supports both minus and plus format for DVD writing. The available
speeds are 8x for DVD±R and 4x for DVD±RW
Currently, only few 8x certified DVD+R media are available on the market
and even fewer DVD-R 8x.
8x DVD-R
In
order to
be able to show the writing process of a DVD-R disc we used the latest version
of NeroCDSpeed and a certified 8x DVD-R media. The disc was written under CLV
mode with start speed at 6.00x. The speed was increased after the 600MB
mark of the disc to 8.19x and the drive kept that speed until the end of the
writing process. The reported average writing speed was 7.70x
8x DVD+R
Memorex
True-8x uses the same writing method on both
DVD-R and DVD+R media. On both media the drive increased the writing speed
at the exact same area of the discs. After the end of the test NeroCDSPeed
reported the same outcome. All three measurements from both discs are the same
and therefore the
writing
method
used by the drive.
4x DVD+RW
With
DVD+RW media the drive supports 4x CLV writing. After the end of the test the
manufacturers specifications were confirmed with start and end speed at around
4x.
4x DVD-RW
For
the DVD-RW writing test we used a JVC-RW media certified writing at 4x. CDSpeed
reported an average writing speed of 4x CLV. This is the first drive we tested
that supports 4x DVD-RW writing.
- Burning Tests
The following graphs show the maximum writing speeds for all available DVD
formats for the Pioneer drive. For comparison, we also include the writing
times
for the Sony DRU-530A and Plextor PX-708 drives.
Because of the writing speed specifications for DVD-R/-RW, the Pioneer drive
gave the lowest writing times amongst the three drives. For DVD+R/+RW media
where
all drives support 8x and 4x respectively, Plextor drive was the fastest
on the DVD+R writing with burning time of 7:53 while Sony leads in the
DVD+RW
writing with burning time at 13:44
The following screenshots were taken from Nero, after successful burnings.
The recording project is the same
dvd-video compilation for all the tests.
Media
|
Code
|
Recording Speed |
Mitsubishi Kagaku 8x DVD+R |
MCC003 |
8x |
JVC 8x DVD-R |
TYG02 |
8x |
TDK 4x DVD-R |
TTG01 |
4x |
Mam 4x DVD-R |
MCI4XG01 |
4x |
Ritek 4x DVD-R |
RITEKG04 |
4x |
Verbatim 4x DVD-R |
MCC01RG20 |
4x |
CMC 4X DVD-R |
CMCMAG.AF1 |
4x |
CMC 8X DVD+R |
CMCMAG EO1 |
4x |
N-Tech 4x DVD-R |
MXLRG01 |
2x |
TY 4x DVD+R |
YUDEN000T01 |
4x |
PHILIPS DVD+RW 4X |
PHILIPS 041 |
4x |
JVC DVD-RW 4X |
JVC0VictorD7 |
4x |
The table above presents the writing speeds of the drive for the various
media formats.
- Packet Writing Tests
For this test we copied a 403 MB file (412.822 KB) from Hard Disk (on the
same PC as the recorder) to the formatted RW media through Windows explorer
(drag and drop).
DVD-RW
|
Duration
|
Average speed
|
Read
|
2:31 min
|
2X
|
Write
|
2:57 min
|
1.99X
|
DVD+RW
|
Duration
|
Average speed
|
Read
|
2:02 min
|
2.5X
|
Write
|
1:26 min
|
3.5X
|
12. KProbe PI/PO quality tests
Memorex DVD±RW True-8x - Page 12
KProbe PI/PO
quality results
The following screenshots show the PI/PO scans for the various DVD-/+R
and DVD-/+RW media, recorded with Memorex True-8x at the maximum permitted
speed.
The software used for the measurements was the KProbe v1.1.26, the ECC was
set to 8 and the reader was LiteOn LDW-811s. The specific methodology is very
dependable on the
drive
used as a reader, while the reliability of the PI/PO provided output is not
also technically confirmed. Hence as a result, we cannot come up with
fully reliable conclusive
results,
although we do make a comparison
of the drive's behavior
when using
various
DVD recordable/rewritable
media.
The discs used came from Verbatim, TDK, Ritek, CMC, Mitsubishi Chemicals,
Taiyo Yuden and Maxell. Further details about each disc's type are presented
at the bottom of this page.
-
TDK 8x DVD-R (Recorded at 8x)
-
TY 4x DVD-R (Recorded at 4x)
-
Ritek 4x DVD-R (Recorded at 4x)
-
TDK 4x DVD-R (Recorded at 4x)
-
MCC 4x DVD-R (Recorded at 4x)
-
MC 4x DVD-RW (Recorded at
4x)
-
MITSUBISHI KAKAGU 8x DVD+R (Recorded at 8x)
-
Maxell 4x DVD+R (Recorded at
4x)
-
TY 4x DVD+R (Recorded at 4x)
-
MKM 4x DVD+RW (Recorded at
4x)
Media
|
Code
|
TDK 8X DVD-R
|
TTG02
|
TDK 4X DVD-R
|
TTG01
|
RITEK 4X DVD-R
|
RITEKG04
|
TY 4X DVD-R
|
TTG01
|
MCC 4X DVD-R
|
MCC01RG20
|
MITSUBISHI KAGAKU 4x DVD-RW
|
MCC01RW4X
|
MITSUBISHI KAGAKU 8X DVD+R
|
MCC003
|
Maxell 4X DVD+R
|
YUDEN000T01
|
TY 4X DVD+R
|
TY T01
|
MITSUBISHI KAGAKU 4x DVD-RW
|
MKM A02
|
13. Conclusion
Memorex
DVD±RW
True-8x -
Page 13
Conclusion
Pros
|
Cons
|
- 8x DVD+R writing
- 8x DVD-R
writing
- 4x DVD+RW/-R writing
- Very Good
CD/DVD error correction
- Supports CD-Text (reading/writing)
- Supports Key2Audio
- CD-R media compatibility
- Quality CD writing
- DVD-RAM
reading
- Supports
reading of 99min audio discs
- Good DVD
writing quality
|
- Increased
CD seek
times
- Cannot
playback/rip CDS200 CD
- Increased
DVD seek times
- High price
- Not working
backups with SafeDisc protected games
- Does not
supports read leadin and read leadout information
- Overburning
|
Memorex True-8x proved to be a quality writer on CD and DVD media. The
drive supports both plus and minus format at maximum available speed
8x, for the recordable media. Although the availability of 8x DVD-R media
in the market is limited, the drive reached the maximum writing speed of 8x
on
a TDK 8x
DVD-R while the CMC 8x certified disc was written at 4x.
No problems occurred
on the plus format where the market availability is wider.
The compatibility of the recorded DVD media was also high, and the recorded
discs were readable to all the PC DVD readers we tested.
As for the CD format, the 24x writing speed was supported
with all media we tested, although this was expected for an average writing
speed. On the rewritable media Memorex supports 24x for
the CD family and 4x for the DVD family and all
the rewritable media tests were conducted with no problems. The weak point
here is the lack of overburning.
On the reading part Memorex read all discs we tested without encountering
any problems. On both CD and DVD, Memorex True-8x proved
to be a fast
reader
but with seek
times above normal especially on the Full seek test. Also notice that the drive
is capable of DVD-RAM reading.
The CD and DVD error correction tests were not a problem for Memorex
which managed to read all defective discs. The drive finished all tests and
therefore the average error correction score of the drive is good.
With protected game titles, Memorex didn't make any working backups. The only
game that was successfully backuped was Max Payne protected with SafeDisc v2.51.020.
All other games above that protection were not valid.
On the DAE tests the drive ripped the Key2Audio disc but
was not able even to read the contents of the CD200 protected disc.
Other than that, it managed to rip the contents of our 90/99min test
discs
and its overall speeds for audio extraction were satisfying.
The suggested price of Memorex True-8x according to Memorex Web site is $299.99.
Although the high price, the provided quality probably deserves the extra
expense.