tailieunhanh - A+ Certification for Dummies 2nd phần 4

Các tiến bộ sâu rộng trong SCSI-2 đã giải quyết nhiều vấn đề của SCSI-1. SCSI-2 đã thiết lập nền tảng của xe buýt SCSI mà tất cả các cải tiến trong tương lai đã được xây dựng. SCSI-2, còn được gọi là Fast-Wide SCSI, xác định hai giao thức riêng biệt: | The extensive advancements in SCSI-2 solved many of the problems of SCSI-1. SCSI-2 established the foundation of the SCSI bus on which all future enhancements have been built. SCSI-2 which is also called Fast-Wide SCSI defines two separate protocols Fast SCSI Features data transfer speeds of up to 10MBps over the SCSI-1 8-bit cabling. Wide SCSI Provides for 16-bit and 32-bit SCSI bus structures. It s important to note that these two protocols can be used together to create a Fast and Wide SCSI bus. SCSI-2 also increased the number of devices that could be supported on the bus to 16. SCSI-2 is also backward compatible with SCSI-1 devices but the SCSI-1 devices can only operate at their original speeds. SCSI-3 Also known as Ultra SCSI SCSI-3 defines data transfer speeds up to 20MBps over an 8-bit bus or higher speeds over the Wide SCSI bus. Table 9-2 details the various SCSI specifications including the newer Ultra SCSI and its variations. Table 9-2 SCSI Specifications SCSI Type Bus Width Maximum Devices Transfer Speed MBps Connector Size Pins SCSI-1 8 8 5 25 SCSI-2 8 8 5 50 Fast SCSI 8 8 10 50 Wide SCSI Fast Wide SCSI 8 16 20 68 Ultra SCSI 8 8 20 50 Wide Ultra SCSI 16 16 40 68 Ultra2 SCSI 8 8 40 50 Wide Ultra2 SCSI 16 16 80 68 Ultra3 SCSI Ultra160 16 16 160 68 Ultra320 16 16 320 68 For more information about SCSI specifications visit the Web site of the SCSI Trade Association SCSITA at . Serial SCSI or FireWire technology Instant Answer An alternative bus interface that is associate with SCSI-3 is Serial SCSI better known as FireWire which defines a high-speed serial bus structure that can connect up to 63 devices. FireWire is also called IEEE 1394 and HPSB High Performance Software Bus . It is capable of data transfer speeds of 100Mbps in its original specification and up to 3200 Mbps in the newer IEEE 1394b specification. FireWire supports hot swapping the addition or removal of peripheral devices without restarting the PC multiple data .

TỪ KHÓA LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.