Sector
it is the primary storage unit of a computer
It spins for one ( at usually 7200 rpm) and writes in a language that involves 1 and 0's(Binary Code) It is a like a rewritable CD but a lot cooler A hard disk stores data in much the same way as a floppy drive, magnetic pulses are imprinted onto the surface of the disk by a read/write head which can also then read the data back. Hard disks differ from floppies in that the data can be stored in much higher densities and accessed at much higher speeds by using a non-removable disk which is sealed from contaminants. Modern hard disks usually have several disks within them (platters) and dedicated read/write heads for both sides of each. The platters themselves are usually made of some aluminum alloy coated with a thin layer of iron oxide and are very rigid. A hard disk drive (HDD), commonly referred to as a hard drive, hard disk, or fixed disk drive, is a non-volatile storage device which stores digitally encoded data on rapidly rotating platters with magnetic surfaces. Strictly speaking, "drive" refers to a device distinct from its medium, such as a tape drive and its tape, or a floppy disk drive and its floppy disk. Early HDDs had removable media; however, an HDD today is typically a sealed unit (except for a filtered vent hole to equalize air pressure) with fixed media.
The system unit is basically the whole computer minus the monitor and peripherals like keyboards, mice, speakers, webcams etc. Most system units will be composed of: · Central Processing Unit Usually referred to as the CPU, it's the brain of the computer and its most important part as it performs the instructions of computer programs and executes the functions of the computer. · Disk Drive Most commonly a CD and/or DVD disk drive nowadays, though there are still computers in operation withfloppy disk drives, they are used to read externally inserted disks so as to extract data off them. · Expansion Cards These include graphics cards and sound cards that offer new functions and possibilities to the computerand its users. Most units will have spaces for these cards to be easily added. · Hard Disk Drive Otherwise known as the hard drive, this is a computer's main storage component, this is often confused with memory, or RAM. · Random Access Memory: Commonly known as RAM, it supplies and holds information that the CPU uses while the computer is switched on, but does not store it to permanent memory. · Power Supply Unit Like a battery, no juice no work! The PSU in most PCs converts the AC electricity from the mains into DC to eliminate surges that may damage the delicate infrastructure of the system unit. · Video Card: Otherwise known as a display adapter, they are used as a medium between the system unit and themonitor.
== == Well, the computer does not have a brain like humans but it can do certain operations like math and logic in the CPU (Central Processing Unit) and it stores data in the hard disk. If you were asking about the physical location of it: * The CPU is under the heat sink which is the big metal piece covered by the fan. * The hard disk looks like a meta and plastic box in the front end of the case connected by a flat wire (IDE) and 4 wire with different colors.
Bit "A bit is the smallest unit of data that a binary computer can recognize." Morley, Deborah (2010-02-09). Understanding Computers (Page 52). South-Western. Kindle Edition.
Sector is the smallest unit on Hard disk identified & addressed by File System.
The smallest addressable unit of storage on a disk is called a sector.
It all depends on how your disk is formatted.
A cluster is the smallest unit of disk space that can be allocated to a file
sector
Hard Drive Disk (HDD)
The smallest storage access unit on an IDE hard drive is a sector.
Fixed disk
It is called a block (or sector). The size of the block varies depending upon the size of the disk, advanced preferences (the size of files normally being used on that disk), and the filesystem being used. They normally run from 512Bytes to 64KiB. As disk capacity continues to grow, look for even larger block sizes to come :-)
the hard disk
Hard Drive Disk (HDD)
Hard Drive Disk (HDD)