CST8174_Lecture_10_Introduction to SCSI and RAID

CST8174_Lecture_10_Introduction to SCSI and RAID -...

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Algonquin College CST8174 CST8174 Computer Technology Basics SATA, RAID, SCSI Drives
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Wednesday, May 13, 20 1 - 2 Algonquin College CST8174 Serial ATA Virtually all hard drives to date use a parallel data bus to transfer data The SATA technology uses a serial interface Serial ATA is backwards compatible with parallel ATA Existing BIOS Operating systems Drive Utilities Software applications
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Wednesday, May 13, 20 1 - 3 Algonquin College CST8174 Serial ATA Physically they differ very much Uses thinner seven wire data cable Smaller redesigned cable connectors Serial ATA offers the following improvements Capable of exceptionally high transfer rates Hot-plugging capability Easier to route data cable
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Wednesday, May 13, 20 1 - 4 Algonquin College CST8174 Serial ATA Uses 8B/10B encoding scheme Scheme traditionally used for data communications, used by Gigabit Ethernet Very popular with high-speed serial transfer 10 bits are sent for every 8 bits of actual data Guarantees that no more than 4 consecutive 0’s or 1’s will be transferred Uses a special 15-pin power cable
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Wednesday, May 13, 20 1 - 5 Algonquin College CST8174 Serial ATA SATA specifications SATA Type Bus Width (Bits) Bus Speed (MHz) Cycles per Clock Bandwidth (Mbps) SATA-150 1 1500 1 150 SATA-300 1 3000 1 300 SATA-600 1 6000 1 600
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CST8174_Lecture_10_Introduction to SCSI and RAID -...

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