Epson 20 Uživatelský manuál stáhnout pdf (Strana 66)

A hard disk consists of two or more platters stacked on top of one

another; so it has four or more sides with many more tracks per side

than a diskette. (The number of tracks depends on the capacity of the

hard disk. You do not need to know how many sides and tracks your

hard disk has.)

A disk is further divided by sectors. To understand what a sector is,

picture the spokes on a bicycle wheel radiating from the center of the

wheel to the tire. The space between one spoke and the next is like a

sector on a diskette; the lines dividing the sectors cut across the

tracks. (See the figure below.) A diskette can have 8, 9, 15, or 18

sectors per track. The number of sectors on a hard disk depends on

the type of hard disk.

track

Your computer uses the read/write heads in a disk drive to store and

retrieve data on a disk. To write to a disk, the computer spins it in the

drive to position the area on the disk where the data is to be written

under the read/write head. A diskette has an exposed area where the

read/write head can access it.

Using the Equity 386

4-9

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 217 218

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Epson 20 Uživatelský manuál Strana 66