Labels:box | bridge | car | earth | hard disc | plaything | poster | road | sky | tree OCR: COMPUTER HARDWARE FIGURE 2-23 Hard disk platters and read- Spindle write heads are sealed inside Read write head the drive case or cartridge to screen out dust and other -omn taminants. Platters CLICK TO START Personal computer hard disk platters are typically 3.5 in diameter, with storage capacities ranging from 40 GB to 1 TB Miniature hard drives such as Hitachi's Microdrive featured on Apple's iPod digital music player, store 30 to 160 GB Hard disk access times of 6 to 11 ms are not uncommon, whereas floppy or CD takes about half second to spin up to speed and find data Hard disk drive speed is sometimes measured in revolutions per minute (rpm). The faster a drive spins, the more rapidly tcan position the read- -write head over specific data. For example a 7 200 rpm drive is able to acc ...
