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Vocab Chapter 8

DefinitionWord
an iIDE cable that had 40 pins but uses 80 wires, 40 of which are ground wires designed to reduce crosstalk on the cable. 80-conductor IDE cable
A nonprofit organization decicated to creating trade and communication standards. ANSI (American National Standards Institute)
An interface standard, part of IDE/ATA standards, that tape drives, CD-ROM drives, and other drives to be treated like an IDE hard drive by the system ATAPI (Advanced Technology Attachment Packet Interface)
A feature of system BIOS and hard drives that automatically identifies and configures a new drive in CMOS setup. autodetection
a method of data transfer between hard drive and memory that allows multiple data data transfers on a single software interrupt. block mode
The first sector of a floppy disk or hard drive volume; it contains information about the disk or volume. On a hard drive, if the boot record is in the active partition, then it can be used to boot the OS. Also called boot sector. boot record
One or more sectors that constitute the smallest unit of space on a disk for storing data (also referred to as a file allocation unit). Files are written to a disk as groups of whole clusters cluster
A number identifying a channel whereby a device can pass data to memory without involving the CPU. Think of a DMA channel as a shortcut for data moving to/from the device and memory. DMA (Direct memory access) transfer mode
A standard for managing the interface between secondary storage devices and a computer system. A system can support up to four parallel ATA IDE devices such as hard drives, CD-ROM drives, and DVD drives. EIDE (Enhanced IDE)
A standard for external drives based on SATA that uses a special external shielded SATA cable up to 2 meters long. eSATA is up to six times faster than USB or FireWire. external SATA (eSATA)
the 12-bit wide, one column file allocation table for floppy disk, containing information about how each cluster or file allocation unit on the disk is currently used. FAT12
one or more sectors that constitute the smallest unit of space on a disk for storing data. file allocation unit
a drive that can hold either a 5 ¼ inch or 3 ½ floppy disk. floppy disk drive (FDD)
the firmware that controls access to a hard drive contained on a circuit board mounted on or inside the hard drive housing. 16. head- the top or bottom surface of one platter on a hard drive. Each platter has 2 heads. hard drive controller
Formatting performed by the Windows Format program (for example, FORMAT C:/S), the Windows installation program, or the Disk Management utility. The process creates the boot record, file system. high-level formatting
The circuit board that controls a SCSI bus supporting as many as seven or fifteen separate devices. The host adapter controls communication between the SCSI bus and the PC. host adapter
A hard drive whose disk controller is integrated into the drive, eliminating the need for a controller cable and thus increasing speed, as well as reducing price. See also EIDE. IDE (Integrated Device Electroics)
A number assigned to a logical device (such as a tray in a CD changer) that is part of a physical SCSI device, which is assigned a SCSI ID. Logical Unit Number (LUN)
A process (usually performed at the factory) that electronically creates the hard drive tracks and sectors and tests for bad spots on the disk surface. low-level formatting
An older IDE cabling method that uses a 40-pin flat or round data cable or an 80- conductor cable and a 40-pin IDE connector. parallel ATA
A transfer mode that uses the CPU to transfer data from the hard drive to memory. PIO mode is slower than DMA mode PIO (Programmed Input/Output) transfer mode
A sealed, magnetic coil device that moves across the surface of a disk either reading data from or writing data to the disk. read/write head
A fast interface between a host adapter and the CPU that can daisy chain as many as 7 to 15 devices on a single bus. SCSI (Small Computer System Interface)
A number from 0 to 15 assigned to each SCSI device attached to the daisy chain. SCSI ID
An ATAPI cabling method that uses a narrower and more reliable cable than the 80-conductor cable. serial ATA (SATA)
An IDE cable that is narrower and has fewer pins than the parallel IDE 80-conductor cable. serial ATA cable
The resistor added at the end of a SCSI chain to dampen the voltage at the end of the chain. terminating resistor
A method of storing data on a hard drive whereby the drive can have more sectors per track near the outside of the platter.. zone bit recording
Created by: 12hblank on 2012-01-04



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