Storage

Storage

Hard disks

> Hard disks can store data using longitudinal or perpendicular recording
>A hard disk contains one or more inflexible, circular platters that use magnetic particles to store data, instruction, and information
> characteristics of a hard disk include capacity. platters, write heads, cylinders, sectors and tracks, revolutions per minute, transfer rate and access time
> Thw hard disks arms move the read/write head, which reads items and writes items in the drive

Storage ... Storage ~~~

Storage

Mari kita belajar .. (storage)

> Storage is holds data, instructions, and information for future use
> A storage medium is the physical material on which a computer keeps data, instruction, and information

> Capacity is the number of bytes a storage medium can hold
> A storage device is the computer hardware that record and/or retrives items to and from storage medium

• Reading is the process of transferring items from a storage medium into memory
• Writing is the process of transferring items from memory to a storage medium

> Memory (most RAM) , hard disk, memory card and usb fash drives, optical discs, tape

storage device

          

         

computer data storage

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. It is a core function and fundamental component of computers. The central processing unit (CPU) of a computer is what manipulates data by performing computations. In practice, almost all computers use a storage hierarchy, which puts fast but expensive and small storage options close to the CPU and slower but larger and cheaper options farther away. Often the fast, volatile technologies (which lose data when powered off) are referred to as "memory", while slower permanent technologies are referred to as "storage", but these terms can also be used interchangeably. In the Von Neumann architecture, the CPU consists of two main parts: control unit and arithmetic logic unit (ALU). The former controls the flow of data between the CPU and memory; the latter performs arithmetic and logical operations on data.

Primary storage device

Alternatively referred to as internal memory, main memory, and primary memory,primary storage is a storage location that holds memory for short periods of times while the computer running. For example, computer RAM and cache are both examples of a primary storage device. This storage is the fastest memory in your computer and is used to store data while it's being used. For example, when you open a program data is moved from the secondary storage into the primary storage.