最近在yamaha的網站看到一台新的CD-RW燒錄,燒錄速度為44X/24X/44X的倍速
他有提到有關Ultra speed的新規格,請問有誰可以提供小弟這方面的資料
或者可以去那下載等.
謝謝大家

贊助商連結

　　不曉得以下是不是你要的資料？

Ultra SCSI：Data transfers 20 megabytes per second (8-bit bus). 40MB/sec with a 16-bit bus.

Ultra2 SCSI：Data transfers 40 megabytes per second (8-bit bus). 80MB/sec with a 16-bit bus.

Ultra3 SCSI：Data transfers 160 megabytes per second. 16 bit SCSI asynchronous commands with Synchronous data transfer rates up to 160 megabytes per second. LVD (Low Voltage Differential allowed in SCSI SPI-3. There are a lot of changes with SPI-3; High voltage differential (HVD SCSI) and the 32 bit data bus with the Q cable are obsolete, clocking is defined for LVD on both the rising and falling edges of the REQ/ACK clock ?Double Transition (DT) defined, Cyclic Redundancy Check (CRC) defined, Domain Validation defined in SPI-3 and SPC-x, Packetized defined and Quick Arbitration Defined.

Ultra160 SCSI：Ultra160 SCSI is a specific implementation of Ultra3 that includes the three key components of Ultra3 SCSI: Fast-80DT, CRC and Domain Validation. The maximum Ultra160 SCSI data transfer rates are 160MBytes/second.

Ultra160+：All the features in Ultra160 SCSI adding support for packetization and quick arbitration. These are all the features defined in the Ultra3 specification

Wide SCSI：Wide SCSI had a bus width of 16 bits, whereas narrow SCSI has a bus width of 8 bits. The data transfer rate that can be realized depends not only on the bus width but also on the SCSI standard that is being used on the implementation (i.e., Fast SCSI can transfer at 10Mbytes/sec and Fast Wide SCSI can transfer at 20Mbytes/sec).

Wide Ultra2 SCSI：Data transfers 80 megabytes per second.

Narrow SCSI (vs. Wide)：This is the term attributed to today's 8 bit standard SCSI devices. This term is necessary to distinguish today's 8-bit SCSI devices to 16-bit Wide SCSI devices.

Fast SCSI：Provides for performance and compatibility enhancements to SCSI-1 by increasing the maximum synchronous data transfer rate on the SCSI bus from 5 MBytes/sec to 10 MBytes/sec.

Fast Wide SCSI：16 bit SCSI asynchronous commands with Synchronous data transfer rates up to 20 megabytes per second. Bipolar technology with Open collector or active negation single ended bus transceivers, passive or active termination. and Differential (Now called HVD ?High Voltage differential) bus transceivers based on EIA 485 allowed in SCSI-2.

感謝你的回應
但不是我要找的資料
在yamaha的網站上ultra speed是指CD-RW 24X以上的燒錄倍速

那應該不是什麼新規格，就跟R片用不同材質就有不同燒錄速度罷了，
據我所知，RW片表示上會有速度標示：
1.直接標示速度，如4~10X，通常10X的片子也能上12X。
2.標示High Speed，可上12x，沒什麼前途。
3.標示Ultra Speed，可上24x，市面不太容易找到，不知向下相容性如何。
說到這裡，講一下昨天買燒錄機的經驗，通常燒錄機內附的空片，應該都能讓燒錄機以全速燒錄，
否則怎麼知道性能如何，偏偏昨天買了TDK CYC-A482448，就附了一塊"High Speed"的RW片，
但機器是24RW的，這下子叫我如何知道這台機器是否真的24RW，真是離譜，當然，打電話去TDK
他們是死不認帳，說商家給錯了，叫我去換，但人家一拿出來，全部是"High Speed"，怎麼辦？

補充一下，剛剛拿到一片16X RW，上面也是標示High Speed"。
也順便test一下那台tdk燒錄機，只是還找不到24X 來試，順便看標示。

high spped是種規格
指的是10x以上的寫rw片的技術,是為了和4x rw區隔,因為在4xrw燒錄機不是降速就能寫10rw片,只能讀
ultra speed還沒看過,rw真的可上24x ??????????????