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Home > Hardware Reviews > Optical Storage > 8x CD-RW

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

1x

74 mins

74 mins / 650 mb

2x

37 mins

74 mins / 650 mb

4x

18.5 mins

74 mins / 650 mb

6x

12.34 mins

74 mins / 650 mb

8x

9.25 mins

74 mins / 650 mb

12x

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 :

  • Improved tracking performance. The use of Beam Triple improves the follow-up of track on the CD-R/RW and reduces considerably "Track Jumping" (jump of track) during the recording and reading of data.

  • Improved trace performance.
  • Reduced the generation of defective sectors (BLER) during recording.
  • Reduced the appearance of data corruption (CRC error) caused by heat or a media of average quality.

  • Quality of recording increased by the use of an electromagnetic optical structure (magnet floating structure) and not mecanique. (On avoids the appearance of blocking mechanical (Lock-up)).

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 :

Interface

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)

Functions

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

Data Buffer

4MB

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




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