1) Organization of a Microcomputer Part-4
This is Organization of a Microcomputer : Microcomputer Organization Part-5.
Floppy Disk Drives :
All Microcomputer with the exception of some notebooks and palmtop devices, support one floppy disk drive. The floppy disk is a data distribution medium because it is removable after it is read or written. Data and programs can be moved from system to system by storing them on floppy disks. Also, software is sold or distributed on floppy disks. Early floppy disks were 5.25 inches in diameter and used to store from 160KB to 1.2MB of data. A smaller 3.5 inch disk introduced later stores up to 2.88MB of data. Most PCs equipped with 3.5 inch floppy disk dives. Most PCs come with floppy disk drive adapters that support a minimum of two drives.
Hard Disk Drives :
The hard disk drive is used for high-speed access and storage of programs and data. It is a nonvolatile rotating medium similar to the floppy disk. However, it is not flexible, hence the name hard disk. It is capable of storing much more data at significantly higher speeds than the floppy disk drives. Todays typical hard drives stores from 8GB to more than 40GB of data with access times below 10 milliseconds. Hard drives come in several package sizes with disk media or platter sizes from 8 inches to under 1.8 images in diameter. Most Microcomputer hard drives are 3.5 images in diameter, enabling them to fit in the same drive bays as 3.5 inch floppy disk drives. Hard drives attach to a Microcomputer through and Intelligent Drive Electronics or Small Computer Systems Interface adapter port.
This is Organization of a Microcomputer : Microcomputer Organization Part-5.
Floppy Disk Drives :
All Microcomputer with the exception of some notebooks and palmtop devices, support one floppy disk drive. The floppy disk is a data distribution medium because it is removable after it is read or written. Data and programs can be moved from system to system by storing them on floppy disks. Also, software is sold or distributed on floppy disks. Early floppy disks were 5.25 inches in diameter and used to store from 160KB to 1.2MB of data. A smaller 3.5 inch disk introduced later stores up to 2.88MB of data. Most PCs equipped with 3.5 inch floppy disk dives. Most PCs come with floppy disk drive adapters that support a minimum of two drives.
Hard Disk Drives :
The hard disk drive is used for high-speed access and storage of programs and data. It is a nonvolatile rotating medium similar to the floppy disk. However, it is not flexible, hence the name hard disk. It is capable of storing much more data at significantly higher speeds than the floppy disk drives. Todays typical hard drives stores from 8GB to more than 40GB of data with access times below 10 milliseconds. Hard drives come in several package sizes with disk media or platter sizes from 8 inches to under 1.8 images in diameter. Most Microcomputer hard drives are 3.5 images in diameter, enabling them to fit in the same drive bays as 3.5 inch floppy disk drives. Hard drives attach to a Microcomputer through and Intelligent Drive Electronics or Small Computer Systems Interface adapter port.
