Yamaha CRW2200IX manual Buffer Underrun Defined, Yamaha Buffer Underrun Protection

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Introduction

Buffer Underrun Defined

CD-R/RW drives are equipped with buffer memory. This memory temporarily stores data while a disc is being recorded. When buffer memory becomes empty (due to unexpected interruptions or the system’s inability to keep up with the writing process), a writing error occurs. This error is known as a “buffer underrun error.”

Data

If data transfer is

interrupted...

Data is stored in

buffer memory...then buffer memory begins to empty

and then written to disc

When no data is left in buffer memory...

(Buffer Underrun)

writing fails (Buffer Underrun Error)

A Buffer Underrun Error will permanently ruin the disc.

Yamaha Buffer Underrun Protection

Buffer Underrun Protection is featured in Yamaha’s CRW2200 series CD-R/ RW drives. When a buffer underrun is about to occur, a buffer underrun error is prevented by temporarily suspending the writing process. Writing resumes when enough data has accumulated again in buffer memory. Buffer Underrun Protection on the CRW2200 series is extremely accurate, resulting in seamless recording between stop and continuation points.

If data transfer is

Once data transfer

interrupted...

resumes normally...

and buffer memory is

about to empty...

writing is suspended

and enough data has accumulated

in buffer memory...

writing resumes

Yamaha Buffer Underrun Protection ensures error-free results.

Test-writing for Buffer Underrun

You can run a check for the likely occurence of Buffer Underrun by Test-writing a CD-RW disc. The occurrence of a Buffer Underrun depends on your computer system.

Most writing software includes test-writing functions to check the likely occurrence of Buffer Underrun before actually writing the disc.

Buffer Underrun Protection is set to ON by default. Test-writing is not available in this setting. To use test-writing with your computer system, the Buffer Underrun Protection should be set to OFF.

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Contents Page FCC Information U.S.A Achtung English Safety Precautions Iii Copyrights Precautions for TransportationAbout handling CD-R/RW discs Table of Contents Introduction Features of the CRW2200IX DriveAbout IEEE1394 High-fidelity digital audioCD Text support Yamaha Buffer Underrun Protection Buffer Underrun DefinedWindows Users Before UseSystem Requirements Operating System Macintosh UsersCD Writing Software Hard Drive SpaceHigh Speed CD-RW discs*3 Supported DiscsCD-R discs*1 CD-RW discs*2About Partial CAV Constant Angular Velocity About CD-ROMsSerial No Serial NumberFront Panel Front and Rear of Unit➀ Line OUT jacks L/R ➁ Power switch STANDBY/ON➂ DC-IN connector Rear PanelWindows Users Setup ProceduresMacintosh Users ConnectingSet Up the CRW2200IX Drive Install the CD Writing SoftwareElectrical plugs/sockets vary according to country/region LED Turn on the CRW2200IX driveConnection to a PC notebook computer via CardBus card Connection to a PC desktop or tower type computerRear panel Connection to a Macintosh computerFor Windows 98 Second Edition/Me Configuring for the Operating SystemYou can also check the FireWire version in this window Operation Connecting and Disconnecting IEEE1394 DevicesConnecting Devices Disconnecting DevicesEjecting a Disc Loading a DiscEjecting a Disc in an Emergency Computer does not start up TroubleshootingYamaha CD-R/RW Drive web site Drive does not turn onDisc keeps being ejected Disc tray does not openDisc is not loaded No sound of CD-DA audio CD disc is audible Properties setting of the CRW2200IX driveSetting of the Windows Media Player Unstable operations Other symptomsBuffer Underrun error message is displayed Appendix Connecting Multiple IEEE1394 Peripherals TogetherConnecting in a daisy-chain Connecting in a treeAppendix Track-at-Once TAO Writing ModesDisc-at-Once DAO Packet Writing Session-at-Once SAOFor Macintosh About the FirmwareDetermining the Firmware Version of the CRW2200IX drive Status Indicator Messages LED Color LED Indicator MessagesSupported Formats CRW2200IX SpecificationsTwo 6-pin connectors power not supplied to connectors ports AC adapter CRW2200IX series complies with the following specificationsIndex SymbolsYamaha CD-R/RW Drive web site Russia EUROPE, Eastern Europe