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Appeared on: Tuesday, February 19, 2002
Yamaha CRW8424S CD-RW

1. What's new
Yamaha 8424S SCSI CDR-W - Page 1

Yamaha 8424s Internal DriveAfter so many manufactures shipped 8x CDR-W Yamaha released it's own 8x/4x/24x CDR-W. Can this drive compete existing 8x CDRs ? How good it is ? Find out by reading the review..

Introduction :
Yamaha is well known to CDR users. In 1990 1st released 2X-speed CDR (100x series), in 1993 1st released 4X-speed CDR (400x series), in 1997 1st released 4X-speed writing CD Re Writable (4260x series) and in 1998 1st released 4X-speed re writing CD Re Writable drive (4416x series). When technology reached 4x speed many people bought for the 1st time CDR-W. Soon competition made 6x CDR and Yamaha released 6416x series. However by that time  competition released 8x CDR and CDR-W (with Sanyo mechanism) but Yamaha didn't had announced any plans for hi-speed CDR-W drive. Many people thought that this was the end of Yamaha CDR-W. But Yamaha tech's was working hard to build their own mechanism. At last before the century ends they released 8424x (some late) to compete other's 8x CDR-W models which already had dominated hi-speed CDR-W World.

Recording Speeds and Times

74 mins / 650 mb


74 mins

74 mins / 650 mb


37 mins

74 mins / 650 mb


18.5 mins

74 mins / 650 mb


12.34 mins

74 mins / 650 mb


9.25 mins

74 mins / 650 mb


6.17 mins

New Mechanism from Yamaha:
From previous series Yamaha made mechanism of 8424s from scratch. As they stated into their press release : ".. completely re-designed for highest reliability and quality. The new optical head of the Yamaha CRW8424 is designed by Yamaha to assure optimum recording quality, and reflects their ten years of experience in the CD recorder industry. On the audio side, the recording quality of the new CRW8424 creates pure sound reproduction, and its audio extraction is improved and more accurate.."

What's new?
Technology PPLS (Pure LASER Phase System)
Yamaha developed in particular new technology PPLS (Pure Laser Phase System) integrated directly in the light unit of the recorder. The adoption of this technology PPLS makes it possible to strongly increase the signal of recording and corrects the "Jitter" (deviation compared to the original signal) from approximately 25% compared to the models Yamaha precedents. This new technology of optical recording of precision reduces considerably the risks of, corruption clerical errors of the data and is compatible with the majority of the marks of medias.

Laser technology triples beam (LASER Beam Triple)
New series CRW8424 in combination with the PPLS, uses a technology Triple LASER Beam (Beam Triple) in order to guarantee an optimal recording and a perfect reading of the data. Yamaha 4416 & 6416 series also have triple beam technology inside.

"Beam Triple" offers the following advantages :

RapidLinked for a faster writing in mode UDF Packet Writing

Optimum Power Control (ROPC) for maximized media writing integrity. The Yamaha integrate a function OPC (Optical Power Control) which makes it possible to recognize the media automatically, to adapt the LASER according to its characteristics and at every moment to control the writing of the media for a maximum integrity of the data (system R-OPC).

Yamaha 8424s CDR-W Specifications :


Scsi 3 (Ultra SCSI)

Transfer Rate

10X-26x CAV read
(1500KB/s - 3600KB/s Data Transfer Rate)

Writing/Reading Speed

              Writing : CDR    1x, 4x, 6x, 8x
                            CDRW 2x,4x

               Reading : 24x (max) Full CAV
               Note     - Data : 10-24x
                           - CD-DA Extraction : 16x (max)
                           - Drive can play CD-DA at 1x speed only
                           - Video-CD : 6.9x (max)
                           - Disc (session closed) : 24x (max)
                             (12x max for packet writing)
                           - Disc (session not closed) : 8x (max)
                             (6x max for packet writing)

Writing Methods

Disc At Once (DAO)
Session At Once (SAO)
Track At Once (TAO)
Packet Writing

Data Capacity supported

700MB (79min)
650MB (74min)
550MB (63min)

Burst Transfer Rate

5mb/s (max) (asynchronous)
20mb/s (max) (synchronous)


Multi Read, Horizontal, Analog output, Plug & Play/ SCAM Compatible, Flash ROM

Data Buffer


Supported CD Formats

CD-DA, CD-ROM(MODE-1,MODE-2), CD-ROM XA MODE-2(FORM-1,FORM-2), Multi-Session Photo CD, CD-I, Video-CD, CD Extra, CD+G, CD-RW

2. Installation

Yamaha 8424S SCSI CDR-W - Page 2

Yamaha 8x series include:
CRW8424E   (Internal IDE)
CRW8424S   (Internal Scsi)
CRW8424SX (External Scsi)

OEM version included drive, manual (English,Deutsch,Francais,Espanol) and CDR Software (Nero)..However full retail version will include: Easy CD Creator 4, DirectCD 3.0 and Adaptec Take Two. Media: 1 x, CD-R, 1 x CD-RW, Audio Cable, IDC cable (SCSI ribbon), Operating Guide and Software Guide..

Also Media included on Value Kit:

Yamaha CDM 74 SB
CD-R 74min (media made in Singapor)
ATIP : 97m 34s 21f
Disc Manufacturer : Mitsubishi Chemicals Corp.
Dye : Cyanine Type 1
Type : Cd Recordable
Normal Capacity : 656.40 Mb (74min 43s 00f / LBA 336075)

Yamaha CDM 74 SY
CD-R 74min (media made in Japan)
ATIP : 97m 24s 01f
Disc Manufacturer : Taiyo Yuden Limited
Dye : Cyanine Type 1
Type : Cd Recordable
Normal Capacity : 656.40 Mb (74min 43s 00f / LBA 336075)

Yamaha 8424S Front

I removed old Yamaha 4416s and i placed 8424s. It has default SCSI ID 3 and termination on. If you have more devices on Scsi card you maybe change SCSI ID number. Don't worry.. Yamaha 8424s manual describes very good how change SCSI ID number and termination..After boot CDR-W intentified as Yamaha 8424s into both DOS & Windows.

I unchecked Auto Insert notification, checked Sync Data Transfer (as manual suggests) and reboot. Yamaha 8424s was October 1999 model with v1.0d firmware. All latest software version (Prassi PrimoCD Pro 8 v1.1.317, Nero v4.0.7.0, DiscJuggler v1.05.395, CDRWin v3.8a) supported Yamaha 8424s..All was set and time to start tests..

Yamaha 8424S Back

Test Machine:
Celeron 300A over clocked to 464 MHz
128 MB SDRAM PC 100
Quantum Fireball EX 6.4 GB UDMA
MS Windows 98 SE
Plextor UltraPlex 40max, Firmware v1.01, (with Auto Insert Notification & Sync transfer off & on). Plextor Manager 2000 v1.01.2 was running at the background with the 17x-40x Speed Setting and 2 minutes Spindown Time-out Setting.
Teac 532E-A Firmware v3.0A
Yamaha 8424s Firmware v1.0d

3. Data Tests

Yamaha 8424S SCSI CDR-W - Page 3

Data Tests

Test Method:
I used CD Speed 99 v0.6, SCSI Mechanic v2.1h (evaluation version) and SiSoft Sandra 99 v8.5.30 to run Data tests. I run all tests with Sync Data Trasnfer On. All tests done with the same CD.

CD Speed results:        (Speed : Bigger is better,  Seek Times : less is better, CPU Usage : less is better)


Speed (x)

Seek Time (ms)

CPU Usage (%)











Sync On











- SiSoft Sandra 99 results:

Drive Index

Track Speed (ppm)

Buffered Read (mb/s)

Sequential Read (mb/s)

Random Read (kb/s)

Average Access Time (ms)

Sync On







SCSI Mechanic results:                                                 (I/O throughput : Bigger is better)

Random I/O
throughput (kb/s)

Sequential I/O
throughput (kb/s)

Same Sector I/O
throughput (kb/s)










Sync On










Verdict of Data Tests:
Yamaha 8424s really gives what it promises. Average transfer rate is 2.6Mb/S and max is 3.6MB/s (24x). As for seek time it gives lower than what's on specification 121ms (random). Also since it is a SCSI device it has low CPU usage. You have to ebable Sync Data Tranfer for making the drive work in max speed. Yamaha seems to be a typical 24x CD Rom. Most users will not need reading data capabilites of Yamaha 8424S since latest CD Rom are 32x,40x even 50x capable.

4. DAE Tests

Yamaha 8424S SCSI CDR-W - Page 4

DAE Tests

CD Speed  results :       (Speed : Bigger is better,  Seek Times : less is better, CPU Usage : less is better)

Dae Quality/ Accurate Stream

Speed (x)

Seek Time (ms)

CPU Usage (%)











Sync On

10 - Yes











Plextor PX-40TS DAE Graph (Sync on)

Various Rippers Results:

Test Method: I used CDFS.VXD & EAC v0.85 beta 4 to test audio capabilities. Eac reported that drive was capable of accurate stream but it aslo had "caching on"..So i compared the "Burst" vs "Secure Stream with caching" mode..

Tested CD: The Chemical Brothers "Dig Your Own Hole" - Track:  5 (Setting Sun)

Comparing Method:

- Ripped Track 5 of the CD with Drag & Drop (using CDFS) and with all the other CD Rippers.
- Edited all wavs with Hedit v2.0.04 and located the 2 following bytes (chosen randomly)
- Removed all previous bytes and saved.
- Then in a Dos window compared them using: FC /b x.wav y.wav

Programs Settings:

CDFS Driver v4.00.130: Drag  & Drop
EAC v0.85b: Burst & Secure Mode / Rip Speed Default / Allow speed reduction / Error correction medium


Average Speed
(Sync Data Transfer On)

(Sync Data Transfer On)

CDFS Driver v4.00.130

53 sec for 56.630kb= 7.12x

No clicks..No sec  lost..Seemed ok!

EAC v0.85b (burst)


No clicks..No sec  lost..Seemed ok!

EAC v0.85b (secure)


No clicks..No sec  lost..Seemed ok!

Comparing Results

CDFS Driver v4.00.130

EAC Burst

EAC Secure



After i also used Copy&Test Selected tracks. I marked all tracks and after i set Burst mode (max) for ripping speed i started test..(alternative way to check DAE quality..). Results were the same as before..All tracks ripped on max speed (9-15.7x) and all checksums were ok!..That means Yamaha 8424s is capable of doing up to 16x (max) DAE!!

Verdict of DAE Results:
Yamaha really re-designed 8424s and this showned on DAE tests..In start when i saw 16x DAE performance from specifications i thought. "Just another tipical number which will not be confirmed on real life. " However Yamaha managed to suprise me..All tests confirmed that Yamaha 8424s managed to reach <16x DAE performance. CDFS didn't worked so well with Yamaha 8424s since it only reached 7.12x. EAC secure mode (with caching) performed from 4x-4.5x however into last sec halted and average speed dropped on 3.0x. Maybe this is EAC problem. Eac Burst mode performed best giving up to 13.9x.

5. CDR Tests

Yamaha 8424S SCSI CDR-W - Page 5

CDR Tests

Yamaha 8424s tested mainly 8x (CDR Media) and at 4x (CDR-W Media)

Software used:
Nero v4.0.7.0
PrimoCD Pro 8 v1.1.317
Padus DiscJuggler v1.05.395
Feurio v1.30

Brand Of CDs:
Mitsui Gold & SG
Yamaha 4x RW
LeadData 4x RW

(On the Fly) CD Copy (both Data and Audio)
Data CDs (Multisession)
AudioCDs (from mp3 and wav files)
OverBurn (on both 74 & 80min CDs)

By suprise all tests completed ok!. I done above 50 CDs on 8x during the various tests ,many in sequence, and Yamaha 8424s wrote them without any problem. Overburn worked ok in 74 & 80min CDs. It is pretty nice to have a full CD (650mb) on 9.15mins ! I also done various burns with both Yamaha 8424s (8x) & 4416s (4x) at the same time and problem apeared..I didn't had from all tests not a single coaster. Yamaha 8424s has the same problem with buffer size as previous models. Feurio (for example) uses only 3.0mb of 4.0mb total. Why this happens ? Check FAQ page.

6. Conclusion

Yamaha 8424s SCSI CDR-W - Page 6


Positive (+):

Negative (-):

- 4MB Buffer
- Scsi 3 Support
- Support most burn speeds (1x,4x,6x,8x)
- Supports (2x,4x) CD-RW burn speed
- True 24x (max) Data performance
- Up to 16x (max) DAE!!
- All know burning method  (TAO,DAO,SAO,Packet Writing) support
- OverBurn support
- Official support for 80min CDs
- No problems with uncertified 8x Media
- Good manual for beginners..

- No CD-Text (read/write) support
- No Raw read/writting (which most newer scsi drives don't support either)
- Newest 8/4/32 drives which support CD-Text and 32x reading..

Overall Yamaha 8424s is the best Yamaha CDR-W ever tested. It writes at 8x and rewrite them at 4x without any problems. Even non-certified 8x media worked OK with it. Speed when reading data is 24x (max) and when used for DAE goes up to 16x! (max). However it has newest 8432 drives to compete which support CD-Text and are capable of reading 32x speed. Who will won ?

7. FAQ

Yamaha 8424s SCSI CDR-W - Page 7


Is Yamaha 8424s any good?
Yamaha 8424s seems to be the best Yamaha CDR-W ever tested..

When Yamaha going to support CD-Text?
The next generation after 8424x will support CD-TEXT. This new generation will be launch on Spring-Summer 2000.

Is there any possibility with firmware upgrade to include CD-Text on current Yamaha Models?
No, because for supporting CD-TEXT you need a Red Book LSI (Chipset) and firmware modification. Sony created CD-TEXT and they sales LSI chipset to other manufacturer. Yamaha built is own red Book LSI chipset. The next generation will have a new red Book LSI chipset with CD-TEXT and faster DAE (above 24X!!)

Why don't Yamaha CDR-W drives support read/write RAW?
When you use MMC-3 (ANSI Multimedia Command Set SCSI-3) standard is quite difficult to implement RAW read/write..That's why all newer CDR-W doesn't support it..

Why i should (or not) care about RAW read/write?
Read/write RAW is very useful to users..With the arrival of CloneCD users, which their CDR-W supports RAW read/write, can do <backups> of their protected CDs..

Is Yamaha plans any 12x CDR-W drive soon..
Yamaha Japan is developing for Q3 2000 a Ultra speed CD-R/RW drive. The pick up will be specially designed for High speed..

Hmm..How come other manufactures released 12x CDR-W before Yamaha?
Other manufactures used pick from Sanyo. Sanyo Pickup are generally boosted. The 8X Sanyo pick up series cannot write in 6X because originally they have a 4X structure. So they write in 1X 2X 4X and 8X (the 8X is a 4X boosted). It's the same for the 12X. The pick use a 8X technology and it's boosted to 12X.

It is much easier for some manufacturer to make fast drive but the reliability of the writing is not very good. Yamaha 8X technology it's the same for Sony and Philips because it's take time to create a real 8X pickup with a good pricing.

Why various programs like Feurio reports that Yamaha 8424s uses only 3.0 of 4.0mb buffer?
Like all Yamaha burners, the size of the useable buffer is less than the size of the total buffer.

From Feurio Support (Actually is for 4416x series but also fit..): The answer of the Yamaha support was: "The size of the dDRAM is 2 MB however the area for the host is 500 blocks. For instance, in case of Mode 1 data (2048 bytes per block) the buffer area for the host is 2048x500 byte. In case of audio-data (2352 bytes per block), the buffer area for the host is 2352x500 byte (1,176 MB)."

Any plans for 6x CDR-W?
Wait till Cebit 2000..

When we should expect to see DVD+RW (or possibly a DVD-R) from Yamaha?
Yamaha is working on DVDRW 4.7GB format but we expect this drive for 2001. HP and SONY said on Comdex they launch DVD+RW 4.7 on 2001. Everybody is delaying because the CD-R/RW is bigger market (objective: replace the floppy disk) and the DVD-FORUM haven't yet decided for a DVD RW standard. So, we have to wait...

How come 80min CDs are now officially supported by Yamaha?
80min CD-R are officially supported by the Orange book chapter II release 3.1. The CRW8424 have this specification. The 6416, 4416 and before support only the Orange book chapter II release 2.0 (support only 74min and 63min). That's why 80 min wasn't supported before by a lot of drive into past..

Hmm? My 4416,6416 can write 80min CDs...What you are talking about?
CRW4416 and 6416 support CD-R 80 minutes but unofficially because the Orange book ver3.1 chapter II wasn't available at this time. Yamaha is one of the leader of the Orange book forum and OSTA, so since CDR400, Yamaha was able to activate 80min unofficially.

The problem of the 80min is during a long time, the pressure of CD audio manufacturer and Game editor was very strong and they didn't want to see 80min CD-R on the market (remember TDK in 1996-97 was the first to have a CD-R 80min but under pressure they should increase the price to $20). Last Year Taiwan manufacturer like Ritek and Lead Data start to produce CD-R but to have a new market they start to produce cheap 80min without caring the pressure of CD audio manufacturer and Game editor. so now, the Orange book forum have to confirm the Orange book ver 3.1 chapter II, and some major manufacturer CD-R brand like Philips make 80min.

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