RAID Storage Controllers

The storage controllers are the set of mechanism that allows you to store programs and data on your PC. The term "permanent" is used to store the data enduringly into the system memory, while temporary holds data awaiting your PC is on. The storage controllers are a very significant part of the PC after all they hold the programs and data on your PC.

The storage subsystem consists of two types of hardware. the storage devices, which are the drives that grasp data. Usually, the systems contain one or more of the following storage devices: one or more hard disk, CD-ROM or CD-RW or DVD drives, and Floppy disk drives, Tape drives and additional media drives, such as Zip disk drives and consequently. Each of these storage devices talks to the PC through an interface, which is used as an internal communication channel used to move information to and from the storage device. The boundary runs between the controller on the storage device, and a matching controller inside the PC system.

The dissimilar types of Storage Controllers in your system are Floppy disk controller, for floppy disk drives, SCSI controller, for SCSI hard disks & CD-ROM drives, Universal Serial Bus controller, for USB devices. A number of of these controllers, such as floppy controllers, are regularly built on the chipset of the motherboard. Industry-standard consumer generally uses the IDE/ATA interface for hard disks, the floppy interface for the floppy drive and USB together storage devices. There are many different parameter of the storage subsystem that has an effect on the capabilities of the PC as a entire

ROM

Read-only memory (usually known by its acronym, ROM) is a class of storage space media used in computers and other electronic devices. Since data stored in ROM cannot be customized, it is mainly used to distribute firmware (software that is very closely tied to exact hardware and improbable to require frequent updates).

Modern semiconductor ROM chips are not right away distinguishable from similar chips like RAM modules, apart from by the part numbers printed on the package.

In its strictest sense, ROM refers only to mask ROM (the oldest type of solid state ROM), which is made-up with the desired data enduringly stored in it, and thus can never be adapted. However, more contemporary types such as EPROM and flash EEPROM can be erased and re-programmed many times; they are still described as "read-only memory" because the reprogramming process is usually infrequent, comparatively slow, and often does not authorize random access writes to individual memory locations, which are likely when reading a ROM.

There are five basic ROM types:

* ROM
* PROM
* EPROM
* EEPROM
* Flash memory

Motherboard

A motherboard is the central or primary printed circuit board (PCB) creation up a multifaceted electronic system, such as a modern computer. It is also known as a mainboard, baseboard, system board, planar board, or, on Apple computers, a logic board, and is now and then abbreviated carelessly as mobo.

Most motherboards shaped today are intended for so-called IBM-compatible computers, which detained over 96% of the global personal computer market in 2005.Motherboards for IBM-compatible computers are specially covered in the PC motherboard article.

A motherboard, like a backplane, provides the electrical relations by which the other mechanism of the system converse, but unlike a backplane also contains the central dispensation unit and other subsystems such as real time clock, and some tangential interfaces.

A typical desktop computer is built with the microprocessor, main memory, and other necessary components on the motherboard. Other components such as external storage, controllers for video display and sound, and peripheral devices are classically attached to the motherboard via edge connectors and cables, although in modern computers it is more and more common to integrate these "peripherals" into the motherboard.