1. Package - Installation
Mitsumi DW-7872TE DVD±RW recorder -
Page 1
The
availability of dual DVD recorders is continuously increasing. One more drive
has been added to the market, the Mitsumi's DW-7872TE. Since in the market
are already available the 8x dual DVD recorders, we estimate that Mitsumi delayed
more
than we expected to reveal a new model. We have it on good authority, that
Mitsumi is considering withdrawing from the optical drive market.
The drive is capable of 8x DVD+R, 4x DVD-R recording and 4x DVD+RW,
2x DVD-RW rewriting. With CD media, the unit allows recording up to 40x and
24x with recordable and rewritable media respectively. As
a reader it supports 12x for DVD-ROM, 8x for DVD±RW and 40x for CD.
Features
The
Mitsumi DW-7872TE recorder uses the Exac-Link feature to prevent buffer under-run
errors.
Specifications
Type: |
DW 7872 TE |
Interface: |
ATAPI with UltraDMA 33 |
Supported media for writing: |
DVD+R, DVD-R, DVD+RW, DVD-RW, CD-R, CD-RW |
Writing speed: |
DVD+R 8x, DVD-R 4x, DVD+RW 4x, DVD-RW 2x, CD-R 40x, CD-RW 24x |
Reading speed: |
DVD-ROM/DVD-R/DVD-RW/DVD+R/DVD+RW max. 12x, CD-ROM/CD-R/CD-RW max. 40x |
Recording capacity: |
DVD+RW/DVD-RW/DVD+R/DVD-R 4.7GB, CD-R/CD-RW 650MB, 700MB |
Access time: |
CD 120ms, DVD 140ms |
Burst transfer rate: |
PIO Mode 4 / Ultra DMA 33 |
Buffer memory: |
2MB |
Audio: |
digital out and line out at back site (MPC compatible) |
Writing mode: |
TAO (Track-At-Once) with zero gap, variable or fixed packet,
multisession, DAO (Disc-At-Once), SAO (Session-At-Once), Multi-Track Reservation |
Supported formats: |
DVD Video, DVD-ROM, DVD+RW, DVD-RW, DVD+R, DVD-R, CD-ROM,
CD-ROM XA, CD-Text, VideoCD, CD-I, DVD SS-SL, DVD SS-DL-OPT, DVD SS-DL-PTP,
DVD DS-SL, DVD
DS-DL,
DVD DS-DL-OPT, DVD DS-DL-PTP, CD-Extra, CD-Audio, Photo-CD (single-/multisession),
CD-RW, CD-R, CD-I Ready |
Disc diameter: |
120mm or 80mm |
Mounting method: |
Horizontal/vertical |
Compatibility: |
MPC Level 3, MultiRead, PC 2001 |
Supported OS: |
Windows ME®/2000®/XP® |
Weight: |
1kg |
Dimensions: |
42 mm x 148 mm x 194 mm (W x H x D) |
Characteristics: |
Buffer underrun prevention, dust protected enclosure, emergency eject |
The drive uses a 2MB buffer memory store and supports RAW DAO 96 writing
(CD). Thus the drive does not support Mount Rainier,
nor does it read or write DVD-RAM media.
The drive 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).
- The drive
The
european retail package includes a quick start guide and a software CD with
Nero 6. The IDE cable, audio cable and mounting screws are also included.
The drive's front panel is colored light gray. On the tray we can see a
dual DVD logo and the supported recording speed. Below there are placed, from
left to right, the power led, the DVD-RW, DVD+RW and CD-RW logos and the eject
button. Also there is an emergency eject hole, above the button.
On the rear panel there are
the analogue and digital audio outputs (SPDIF), 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. Click on the photos
for
an enlarged view.
The main chipset is manufactured by Mediatek and it is the same with
most 8x recorders coming from Teac, LiteOn etc.
- Installation
The Mitsumi DW-7872TE was connected to our test PC and was identified
as "MITSUMI DW-7872TE" under
WinXP. All tests were done with firmware revision v0054.
The following pages include the test results for the Mitsumi DW-7872TE drive
in comparison with the Teac DV-W58G and Sony DRU-530A, since all drives are
capable of 8x DVD recording.
2. Data CD Reading Tests
Mitsumi DW-7872TE DVD±RW recorder - Page 2
Data CD Reading Tests
- Pressed CD results (Click for
CDSpeed results)
In the graph above, we can see that the drive was the fastest among the
two other, while managed to confirm the manufacturer's specifications. The
difference of 2x is not negligible.
The reported seek times for the Mitsumi drive were quite good for all modes.
However the drive was behind Sony and Teac.
- CD-R results (Click for
CDSpeed results)
We made a copy of the previous, pressed CD in order to test the drive's
behavior with a CD-R media. As in the previous test the Mitsumi drive was the
fastest.
This time Mitsumi was better than Teac, in comparison with the previous
test. Sony had again the better seek times.
- ReWritable Media (Click for
CDSpeed results)
For the reading test
we used 24x High Speed rewritable media from Mitsubishi Chemicals.
In this test Mitsumi had the second fast speed, behind Sony, due to the supported
32x reading for rewritable media.
3. CD Error Correction Tests
Mitsumi DW-7872TE DVD±RW recorder -
Page 3
Error Correction Tests
In the following tests we check the drive's behavior when reading
scratched / defective audio discs. The test discs used were the ABEX series
from ALMEDIO.
- ABEX TCD-721R
Errors
total
|
Num:
872559
|
Errors
(Loudness) dB(A)
|
Num:
47573 |
Avg:
-73.9 dB(A) |
Max:
-36.0 dB(A) |
Error
Muting Samples
|
Num:
2776 |
Avg:
1.0 Samples |
Max:
11 Samples |
Skips
Samples
|
Num:
0 |
Avg:
0.0 Samples |
Max:
0 Samples |
Total
Test Result |
77.0
points (out of 100.0 maximum) |
The performance with this disc was very good. Although the total error count
was high, the maximum loudness error level at -36.0dB is very good. No samples
were skipped. The final
score of 77.0 is good.
- ABEX TCD-726
Errors total
|
Num:
11517940
|
Errors (Loudness) dB(A)
|
Num:
101873 |
Avg:
-36.1 dB(A) |
Max:
-1.9 dB(A) |
Error Muting Samples
|
Num:
117391 |
Avg:
28.7 Samples |
Max:
2705 Samples |
Skips Samples
|
Num:
2905 |
Avg:
118.6 Samples |
Max:
2898 Samples |
Total Test Result
|
44.4
points (out of 100.0 maximum) |
The Abex TCD-726 test disc is much easier for drives in general to read. However
the Mitsumi drive reported poor performance. The total error count was extremely
high, while there were several skips and mutes. That's why we post for both
test
discs the CDSpeed reading graph. As we can see below, in the CDSpeed graph,
DW-7872TE find it difficult to read the contents of the 726 disc.
- 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 to read music and reproduce
it completely. Five tracks on the disc contain a sequence of progressively
more difficult tests. These tracks are referred to as Check Level-1 through
Check Level-5.
The
tracks are reproduced (played) through a software multimedia player (i.e.
Windows Media Player). Each level is considered as passed, if the tone coming
out
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
|
Mitsumi DW-7872TE
|
5/5
|
5/5
|
5/5
|
5/5
|
0/5
|
The drive successfully passed the four first out of the five check levels
for this test. This is a good performance since the fifth level, which includes
artificial scratches of 1.5mm, is difficult for most drives to be read.
- Summary
Test Disc
|
Reading Speed
|
Score
|
ABEX TCD-721R
|
Max
|
77.0
|
ABEX TCD-726
|
44.4
|
Average Score
|
60.7
|
The Mitsumi DW-7872TE managed an average score of 60.7 out
of 100. This is a very low score and it is a resultant of the low 44.4 score
of the 726 test disc.
4. DVD reading tests
Mitsumi DW-7872TE
DVD±RW recorder -
Page 4
DVD reading tests
- Single Layer DVD-ROM (Click
for CDSpeed results)
Mitsumi and Teac reported similar performance, while Sony was the slowest.
The difference between the first two is negligible.
Mitsumi had the higher seek times among the other two drives. Although the
reported seek times was not the worst we ever seen, we would like to be lower.
- 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 on the disc, which is the beginning
of each layer,
and progressing outwards towards to the outer tracks for each layer.
In this test DW-7872TE had the lower speed. However the difference was unconsidered.
Once again the seek times were increased for the Mitsumi drive.
Teac was the best, in this test.
- Dual Layer OTP DVD-ROM
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 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.
As it can been seen in the following screenshot the OTP dual layer DVD test
disc had the same speed as the PTP one. The seek times are about in the same
levels.
- DVD Ripping Tests
We measured the DVD-Video ripping speed of the Mitsumi DW-7872TE using the
latest version of DVD Decrypter. The DVD Video title is the "Matrix" pressed
DVD-Video.
Sony drive was the fastest while Mitsumi was the slowest. However the reported
7165 kb/s is a good transfer rate.
- DVD Recordable / Rewritable reading Tests
The chart below shows the Nero CDSpeed average reading speed results with
the following media:
We would like the Mitsumi drive to be faster in RW reading. We estimate that
the reported speeds are very low.
5. DVD Error Correction Tests
Mitsumi DW-7872TE
DVD±RW recorder -
Page 5
DVD Error Correction
Tests
In the following
tests we examined the DVD reading capabilities of the Mitsumi DW-7872TE drive
with scratched / defective DVD media. For the tests we used CDVD
Benchmark and Nero CDSpeed. The reference test 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 read the contents of the 821 test disc without reporting any reading
error. There were no speed deviations while reading the defective areas on
the disc's
surface.
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 and instead
defective areas ranging in dimensions from 0.5 to 1.1 mm. There
are also fingerprints with height
between
65 and
75 micrometers.
The drive managed to read without particular problems the defective area on
the disc. However
there were some instant speed drops.
- 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.
Once again the disc was read without reading errors and speed falls, for both
layers.
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 (micrometers).
The test finished successfully without reporting any error.
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 layer 0 to layer 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
drive managed to read the disc without reporting any errors. Some intermittent
speed drops didn't affect the reading process.
The drive also had good speed and acceptable seek times for all modes.
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 micrometer high fingerprints.
Once
again the drive finished the test successfully. No error or speed drop were reported.
This disc is not a problem for Mitsumi drive.
6. Protected Disc Tests
Mitsumi DW-7872TE
DVD±RW recorder -
Page 6
Protected Disc
Tests
- Reading Tests
To create an image of the various protected titles onto a hard disk, we
used CloneCD v.4.3.2.2 software and the appropriate settings, depending on
the protection type of the inserted discs. Below are summarized the capabilities
of the Nec drive, according to CloneCD
software. As you can see the drive supports writing of CD+G under RAW DAO:
The game titles we used 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
|
VRally II
|
SecuROM v.2
|
PSX Pressed Media
SafeDisc v.2
SecuROM v.2
Nec managed to rip the contents of all test discs successfully. Mitsumi has
an acceptable behavior in all tests. Also it was faster than Teac and Sony
in
all tests, especially with the PSX game.
- Writing Tests
The Mitsumi DW-7872TE supports the DAO-RAW writing mode.
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.
After making the images of the various titles to the hard disk, we burned them
(maximum speed) with 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 |
SD2 Build |
Settings |
Amplify Weak Sectors On |
Amplify Weak Sectors Off |
Mitsumi DW-7872TE |
Max Payne |
v2.51.020 |
Yes |
Yes |
Serious Sam - The Second Encounter
v1.07
|
v.2.60.052 |
Yes |
Yes |
The Sims Unleashed |
v.2.8 |
Yes |
Yes |
The Sims Superstar
|
v2.9
|
Yes
|
Yes
|
Fifa 2004 |
v3.1 |
Yes |
Yes |
Teac was able to make playable copies of all games we tested. The most difficult
game was Fifa 2004 protected with Safedisc v3.10. In order to test the compatibility
of the written media we tested the Fifa 2004 backup disc on the following devices:
Drive |
Amplify Weak
Sectors On
|
Amplify Weak
Sectors Off
|
Plextor 16x |
No
|
No
|
Pioneer DVD-500W |
Yes
|
Yes
|
Memorex DVD+/-RW DUAL XL |
No
|
No
|
Optorite DD0203 |
No
|
No
|
CyberDRV CW058D |
Yes
|
Yes
|
Memorex True-8x |
No
|
No
|
Teac DV-W58G |
Yes
|
Yes
|
Mitsumi DW-7872TE |
No
|
No
|
Teac CD-540E |
Yes
|
Yes
|
The strange thing here is that the backups were not playable in the same drive,
meaning the Mitsumi DW-7872TE.
7. DAE Tests
Mitsumi DW-7872TE
DVD±RW recorder -
Page 7
DAE Tests
- Pressed and CDR AudioCD results
The Mitsumi DW-7872TE uses 40x CAV reading strategy for CD-DA.
Below is the resultant output from the CDSpeed transfer rate test with a pressed
audio CD:
According
to Nero CDSpeed, the average reading speed was 32.25x, while at the end
of the reading procedure was at 42.79x. The seek times were
good.
We ripped the contents of the same audio disc to our hard disk, using the
CDDAE software. The average ripping speed (burst mode) of
29.6x, was acceptable. Teac was the fastest at 35.2x.
The same pressed audio disc was copied onto a CD-R and was
read again with CDspeed.
This time Mitsumi was the fastest among the other, at 29.5x.
- Advanced DAE Quality
In the Nero CD Speed Advanced DAE test, the Mitsumi drive returned
an average speed of 29.28x, which is good performance, and a quality
score
of 99.2. According to CDSpeed the drive
can read Cd Text and Subchannel Data but not Leadin and Leadout.
- Support of 90/99mins AudioCDs
Mitsumi drive managed to playback both 90min and 99min test discs.
- Reading/Ripping Protected AudioCDs
For the test procedure we used two audio discs with different
audio protection schemes. We tested for both recognition and
ripping to the hard disk. The software used was Exact Audio Copy.
* Pressed Audio disc protected by Nec Key2Audio (Celine
Dion - New Day
Has Come)
* Pressed Audio disc protected by Cactus Data Shield 200 (Natalie
Imbruglia - White Lilies sIsland)
|
Key2Audio |
CDS200 |
EAC |
Mitsumi DW-7872TE
|
OK
|
Recognize the disc but cannot rip
or play the contents
|
Teac DV-W58G
|
NO
|
OK
|
Sony DRU-530A |
OK |
Recognize the disc but cannot rip
or play the contents |
Mitsumi drive playbacked successfully the Key2AudioCD protected disc but failed
with the CDS200, where the drive recognized the disc but cannot rip or play
the contents of the disc.
8. CD Recording Tests
Mitsumi DW-7872TE
DVD±RW recorder - Page
8
CD Recording Tests
- CD-R Writing Tests
The Mitsumi DW-7872TE supports 8x, 16x, 24x, 32x and 40x
writing speeds. Below you can see the CDSpeed writing simulation graph with
Taiyo Yuden
48x CD-R
media.
The
simulation test, under Nero CD Speed, confirmed the manufacturer's specifications
for 40x recording which is under CAV. The average speed was at 32.03x.
- Recording Times
We created an 80min data compilation with Nero Burning
Rom and recorded it on a 700MB disc. The better time that Nec
did was 3:08 minutes, with 40x writing speed
selected.
Below are the best writing times For Mitsumi DW-7872TE drive at 8x, 16x,
24x, 32x and 40x with a Taiyo Yuden media.
In the following graph you can see the recording times with
various media brands.
- CD-RW Writing Tests
The
Mitsumi DW-7872TE supports 24x P-CAV maximum rewriting speed,
with Ultra Speed rewritable media. Below
are the results from the CDSpeed writing simulation test with blank
24x US-RW media from Mitsubishi Chemicals.
The
test once again confirmed the drive's specifications for 24x rewriting. The average
speed at the end of the test was 23.6x.
We also used Nero Burning Rom software to burn a data disc using 24x US-RW
media from Mitsubishi Chemicals again. The data compilation, which we burned,
had a size of 651 MB. The duration of the recording process was 3:41 minutes
for Mitsumi.
- Packet Writing Tests
Using InCD and Mitsubishi Chemicals 24x US-RW media for all Packet Writing
tests, quick format took 37sec. The formatted disc had
530mbs of free space. 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).
Operation
|
Duration
|
Average speed
|
Read
|
2:21 min
|
19.5X
|
Write
|
2:36 min
|
17.6X
|
- Other features
Overburning
|
Up to 89:57
|
CD text reading/writing
|
Yes
|
9. 3T Jitter Tests - Page 1
Mitsumi DW-7872TE
DVD±RW recorder -
Page 9
Writing Quality Tests - 3T Jitter Tests
On an 80min 48X CD-R disc from Taiyo Yuden we burned the same AudioCD
project at 8x, 16x, 24x, 32x and 40x. The 3T
Pit & Land Jitter graphs are presented here.
- 3T Pit results
As we can easily conclude from the graph above, the lower the speed the better
is the quality. At 24x and lower, the writing quality is very good. Above 24x
the litter values are increased, but not in extremely high levels.
The average
3T Pit Jitter values for all recording speeds are illustrated in the following
table.
The average Pit jitter for recording speeds of 24x and over is
acceptable, and very good for those below.
- 3T Land results
The jitter land levels illustrated in the graph above are for all speeds very
good. Especially, once again, recording at 24x and below, is high quality recording.
The following average values graph confirms the very good burning quality
of Mitsumi recorder.
Recording Speed
|
Average 3T Pit Jitter (ns)
|
Average 3T Land Jitter (ns)
|
> 35ns
|
Max 3T jitter values (ns)
|
8X
|
25.12 |
26.34
|
No |
30 Pit, 30 Land
|
16X
|
26.95 |
28.41
|
No |
30 Pit, 31 Land
|
24X
|
29.93 |
29.27
|
No |
32 Pit, 30 Land
|
32X
|
32.95 |
31.34
|
Yes |
38 Pit, 35 Land
|
40X
|
32.88 |
31.71
|
Yes |
38 Pit, 36 Land
|
- Summary
Mitsumi DW-7872TE is a very good recorder, at least with Taiyo Yuden media.
In the following page we test the drive's writing quality with other media
brands.
10. 3T Jitter Tests - Page 2
Mitsumi DW-7872TE
DVD±RW recorder -
Page 10
Writing Quality Tests - 3T Jitter Tests
The same Nero compilation used in the previous jitter tests was used once
again, this time with media from different brands. The recording speed was
the maximum
40x in all cases. The following graphs show the 3T Pit & Land Jitter results.
- 3T Pit results
According to the results we took from the jitter measurements, Mitsumi performed
very well with half of our media brands while with the other half the levels
were increased. The Ritek, Maxell and CMC Magnetics are a very good combination
with Mitsumi DW-7872TE recorder. The rest of the tested brands, Mam, HiSpace
and Creation it is better to be avoided, in combination with this recorder.
The average 3T Jitter values for all manufacturers discs are illustrated in
the following graph.
- 3T Land results
The jitter land values were almost at the same levels with this one of 3T
Pit.
The average values presented below illustrates the drives recording ability.
Recording Speed
|
Average 3T Pit Jitter (ns)
|
Average 3T Land Jitter (ns)
|
> 35ns
|
Max 3T jitter values (ns)
|
Creation 48X |
34.24 |
33.93 |
Yes |
42 Pit, 39 Land |
HiSpace 48X |
35.32 |
34.54 |
Yes |
40 Pit, 39 Land |
Ritek 48X |
29.71 |
30.29 |
No |
33 Pit, 32 Land |
Maxell 48X |
31.68 |
30.59 |
No |
34 Pit, 34 Land |
CMC 48X |
29.22 |
27.39 |
No |
33 Pit, 30 Land |
Mam 52X |
34.71 |
33.17 |
Yes |
40 Pit, 38 Land |
- Summary
As we mention before some media brands can be burned better than others. This
is natural since most drives are compatible with some media brands
while are not with others. Maybe a firmware upgrade will improve the drives
recording behavior with more media.
On the following page we check the C1 and C2 error rates for the same discs.
11. C1 / C2 Error Measurements
Mitsumi DW-7872TE
DVD±RW recorder -
Page 11
Writing Quality Tests - C1 / C2 Error Measurements
The C1 / C2 error rate was measured for the recorded discs burned during the
previous writing tests (jitter). The software used was UMDoctor Pro II, and
the reader was the Optorite DD0203 drive.
-
Taiyo Yuden 48x recorded at 8x
-
Taiyo Yuden 48x recorded at 16x
-
Taiyo Yuden 48x recorded at 24x
-
Taiyo Yuden 48x recorded at 32x
-
Taiyo Yuden 48x recorded at 40x
-
HiSpace 48x recorded at 40x
-
Creation 48x recorded at 40x
Below is presented information on the CD-R
media used in this test.
Disc
|
ID Code
|
Capacity
|
Taiyo Yuden 48X
|
TaiyoYuden 97m24s01f
|
79:59:72
|
HiSpace 48x
|
97m25s07f
|
79:59:00
|
CMC Magnetics 48x
|
CMC Magnetics 97m26s66f
|
79:59:71
|
Ritek 48x
|
Fuji 97m26s45f
|
79:59:73
|
Mam 52X
|
Mitsui 97m27s58f
|
79:59:74
|
Maxell 48X |
Ritek 97m15s17f |
79:59:70 |
Creation 48X |
Plasmon 97m27s18f |
79:59:74 |
- Summary
According to our measurement the drive's CD writing quality is good with
all media brands but mostly with Taiyo Yuden. The C1 levels are all quite low.
However there were some cases that C2 errors were reported. The strange thing
is that all the C2 error were occured at the 68 minute for all cases.
12. DVD Recording Tests
Mitsumi DW-7872TE DVD±RW recorder - Page 12
DVD Recording Tests
- Writing Performance
The Mitsumi DW-7872TE supports DVD-R/RW and DVD+R/RW writing. The maximum
supported speed for DVD+R and DVD-R is 8x and 4x respectively, 4x CLV
for
DVD+RW and 2x for DVD-RW media.
8x DVD+R
A 8x
DVD+R disc from CMC Magnetics was used to check the 8x writing strategy
of the drive. The software used was Nero CDSpeed, and its "create disc" function.
The
drive started the writing at 3.99x, maintaining
this speed until the 800MB address mark
on the
disc,
where
the
drive steps
up to
6x until 2.75GB where once again step up to 8x writing for the rest of the
recording (hence Z-CLV). The average speed is 6.33x.
CMC 4x DVD-R
Maxell 4x DVD+RW
CMC 4x DVD-RW
- Burning Tests
The best recording times are illustrated in the following table after burning
4315MB of data on various DVD±R, DVD±RW media, using the maximum
allowed writing speed for each disc. For
comparison, we
also include
the
writing
times for the
Teac DV-W58G and Sony DRU-530A.
With the DVD-R/RW media Mitsumi was the fasted. However the reported recordings
times for DVD+R/RW was the slowest for Mitsumi, as we expected, due to the
average 6,3x for this format.
The table below presents the writing speeds, media name and media code for
the various
discs used.
Media
|
Code
|
Speed |
CMC Magnetics 8x DVD+R |
CMC MAG F01 |
8x |
Mitsubishi Chemicals 8x DVD+R |
MCC 003 |
8x |
Taiyo Yuden 4x DVD+R |
YUDEN000T01 |
8x |
CMC Magnetics 4x DVD+R |
CMC MAG E01
|
4x |
Mitsubishi Chemicals 4x DVD+R |
MCC 002 |
4x |
Maxell 4x DVD+R |
YUDEN000T01 |
4x |
Mam 4x DVD-R |
MCI4XG01 |
4x |
Taiyo Yuden 4x DVD-R |
TYG01 |
4x |
Mitsubishi Chemicals 4x DVD-R |
MCC 01RG20 |
4x |
CMC Magnetics 4x DVD-R |
CMC MAG AF1 |
4x |
Pony 4x DVD-R |
RITEK G04 |
4x |
Mitsubishi Chemicals
4x DVD+RW |
MKM A02 |
4x |
Maxell 4x DVD+RW |
PHILIPS 041 |
4x |
Pioneer 2x DVD-RW |
PVCW00V00245 |
2x |
Mitsubishi Chemicals
4x DVD-RW |
MCC 01RW4X |
2x |
Philips 8x DVD+R |
PHILIPS C08 |
1x |
Although TY and Maxell DVD+R have the same ID, they burned in different speeds.
Below are the screenshots from Nero:
Maxell 4x DVD+R
TY 4x DVD+R
- Packet Writing Tests
For this test we copied a 403 MB file (412.822 KB) from the 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
|
2:06 min
|
2.4X
|
Write
|
2:38 min
|
1.9X
|
DVD+RW
|
Duration
|
Average speed
|
Read
|
2:06 min
|
2.4X
|
Write
|
1:26 min
|
3.5X
|
13. KProbe PI/PO quality tests
Mitsumi DW-7872TE DVD±RW recorder - Page 13
PI/PO
quality results
The following screenshots show the PI/PO results for various DVD-/+R
and DVD-/+RW media, recorded with the Mitsumi DW-7872TE at the maximum allowed
speed.
The software used for the measurements was KProbe v1.1.28, the ECC was
set to 8 and the reading drive was the LiteOn LDW-811s. The specific methodology
is very dependent on the
drive
used as a reader, while the reliability of the PI/PO provided output is also
not technically confirmed. Hence as a result, we cannot safely come up
with conclusive results,
although we do make a comparison
of the drive's behaviour
when using
various
DVD recordable/rewritable
media.
The recording discs used came from Mitsubishi
Chemicals, CMC Magnetics, Taiyo Yuden, Maxell, Pioneer and Ritek.
Further details about each disc type are presented at the bottom of this page.
-
Mitshubishi Chemicals 8x DVD+R
-
Taiyo Yuden 4x DVD+R (recorded
at 8x)
-
Mitshubishi Chemicals 4x DVD+R
-
Mitshubishi Chemicals 4x DVD-R
-
Mitshubishi Chemicals 4x DVD+RW
-
Mitshubishi Chemicals 4x DVD-RW (recorded at 2x)
Media
|
Code
|
CMC Magnetics 8x DVD+R
|
CMC MAG F01
|
Mitsubishi Chemicals 8x DVD+R
|
MCC 003
|
Taiyo Yuden 4x DVD+R
|
YUDEN000T01
|
CMC Magnetics 4x DVD+R
|
CMC MAG E01
|
Mitsubishi Chemicals 4x DVD+R
|
MCC 002
|
Maxell 4x DVD+R
|
YUDEN000T01
|
Mam 4x DVD-R
|
MCI4XG01
|
Taiyo Yuden 4x DVD-R
|
TYG01
|
Mitsubishi Chemicals 4x DVD-R
|
MCC 01RG20
|
CMC Magnetics 4x DVD-R
|
CMC MAG AF1
|
Pony 4x DVD-R
|
RITEK G04
|
Mitsubishi
Chemicals 4x DVD+RW
|
MKM A02
|
Maxell 4x DVD+RW
|
PHILIPS 041
|
Pioneer 2x DVD-RW
|
PVCW00V00245
|
Mitsubishi Chemicals
4x DVD-RW
|
MCC 01RW4X
|
The drive reported good writing quality with most of the media we tested.
However there were some cases where the PI/PO levels were increased.
14. Conclusion
Mitsumi DW-7872TE
DVD±RW recorder -
Page 14
Conclusion
Pros
|
Cons
|
- 8x DVD+R
writing
- 4x DVD+RW
writing
- 40x CD-R
writing speed
- Excellent
DVD error correction
- Very good
CD writing quality
- Long supported DVD media list
- Supports CD-Text (reading/writing)
- Makes
partially working backups of SafeDisc v3.10 protected games
|
- Poor performance
with ABEX TCD-726 test disc
- Mount
Rainier is not supported
- Low reading
speed with rewritable media
- The CDS200
protected AudioCD is not supported
- DVD
writing quality
|
Mitsumi drive is a fast CD reader with also good seek times. Its ability
with defected discs depends on the type of defection. It performed well with
artificial scratches but not with fingerprints.
As for a DVD reader, Mitsumi was again fast with recordable and pressed
media. However with rewritable media we expected to be faster since the average
4.6x is rather low. Thus the seek times should be lower. The drive's DVD error
correction ability was better than with CD media, in fact
it was
great.
It
managed to
playback
all
of our
test
disc
without
reporting
any error.
The
drive managed to make SafeDisc v3.1 working backups. However the strange is
that those backups are not playable in the same drive, DW-7872TE, while are
in same other. Apart from this the drive is very fast in ripping process
with all the game types we tried.
According to DAE test the drive has a good performance. On the other hand
the drive managed to playback and rip Key2Audio but not the CDS200 protected
Audio
CDs. The drive also can play or rip 99 minutes
AudioCDs.
In the CD recording tests the Mitsumi drive performed very good. The supported
40x maximum writing speed is high. Also the writing CD quality is good, especially
with Taiyo Yuden media. However we would like the supported media list to be
longer. Maybe a firmware upgrade will improve this.
Inspite of the fact that the drive's average recording speed was 6.3x, generally
performed good. The PI/PO levels are generally acceptable. However
there were some cases that those levels were extremely high.
The drive is currently not yet available in the market. The upcoming price,
according to Mitsumi, will be at 169 euro, which is a very high price. We estimate
that with a much lower price, since there are 8x dual DVD recorders already
available at 100~130 euro, will
be a
good
purchase.