PC Hardware A Beginner’s Guide

On the other hand, voice coil actuators are fast, not affected by temperature changes, and extremely reliable. The type of actua ...

the further into the disk area, that is, the closer to the inside of the platter, the heads are tilted slightly, which creates a ...

(^182) PC Hardware: A Beginner’s Guide clean the outside air is may have an effect on the PC, but it won’t have any impact on th ...

Chapter 9: Hard Disks and Floppy Disks^183 only a single cable for data and control signals, such as SCSIs (Small Computer Syste ...

(^184) PC Hardware: A Beginner’s Guide Bezel Many older hard disk drives included a faceplate, orbezel, with the drive. Older fo ...

Chapter 9: Hard Disks and Floppy Disks^185 such as adding the endec into the drive. ESDI drives were used on high-end systems fr ...

(^186) PC Hardware: A Beginner’s Guide FC-AL uses fiber optic cables to connect the disk drives to the controller and the PC. It ...

Chapter 9: Hard Disks and Floppy Disks^187 Data Organization Both hard disks and floppy disks set organization schemes that allo ...

(^188) PC Hardware: A Beginner’s Guide Figure 9-8. Tracks and sectors on a disk platter Figure 9-9. Disk cylinders are made up o ...

Chapter 9: Hard Disks and Floppy Disks^189 Disk Capacities Disk drive capacities are generally stated in megabytes and gigabytes ...

(^190) PC Hardware: A Beginner’s Guide Performance Indicators The most common of the performance specifications are
Seek Time ...

Chapter 9: Hard Disks and Floppy Disks^191 disk. The result is the number of bits (expressed as megabits and gigabits) per squar ...

(^192) PC Hardware: A Beginner’s Guide low-level format erases the disk at the media level (physical erase), in most cases shoul ...

Chapter 9: Hard Disks and Floppy Disks^193 File Systems Operating systems use a file system to manage the allocation and utiliza ...

(^194) PC Hardware: A Beginner’s Guide Operating Systems File System DOS FAT OS/2 HPFS UNIX/Linux UNIX File System/Linux File Sy ...

Chapter 9: Hard Disks and Floppy Disks^195 Disk Compression Since hard disks have become large enough for most users, disk compr ...

(^196) PC Hardware: A Beginner’s Guide Ten different RAID levels exist—0 through 7, 10, and 53, and each one is more com- plicat ...

Chapter 9: Hard Disks and Floppy Disks^197 Atonetime,thefloppydiskwastheprimarydatastoragedeviceonthePC,butithaslately been rele ...

(^198) PC Hardware: A Beginner’s Guide Read/Write Heads Like the heads on the hard disk, the read/write heads on the floppy disk ...

Chapter 9: Hard Disks and Floppy Disks^199 Seek times on a floppy disk are relatively slower than on a hard disk. It is common t ...