Storage Devices

ASSIGNMENT#1
ICT
PC-WAQAR AHMED
BESE-17 A
Submitted to:
Lec. Bilal Rauf

transshipment center Devices
Hard disk(HDD)
Hard Disk is a non-volatile, random access, magnetic storage device used in the computers. These were introduced by IBM in 1956. Main purpose of Hard Drive(HDD) is to gillyflower data. HDD stores data by the process of magnetic recording.
Major Components
* Coer
* Platters
* Head
* index number Connector
* IDE Connector
* Jumper Block
* Actuator
* Spindle
A typical HDD has two electric motors:
* book motor that spins the discs.
* Actuator that positions the hear/write head on the disc.
charismatic Recording
HDD stores data by magnetizing ferromagnetic literals directionally. The data are read from the disk by detecting the transitions in magnetization and decode the originally written data. There are different encode processes, such as:
* Modified Frequency Modulation
* Group tag Recording
* Run-length Limited Encoding
A Cobalt based intermixture is used as magnetizing material. HDD consists of a spindle which holds the platters. Platters are non-magnetic material and hold recorded data.



Platters are usually made of aluminum glass or ceramics. The Platters are spun at very exalted speeds(15000RPM). Data is written to, and read from platter as it rotates previous(prenominal) devices called read-write heads. Read write heads operate very close over the magnetic surface. It detects and modifies the magnetic material under it. Data is stored on this magnetic material i-e disc. The image gives microscopic view of platters.
Capacity
Storage capacity of HDD is increasing day by day. Nowadays HDDs suffer a storage capacity of more than 1000 GB = 1 Terabyte.
External Hard Drives
External HDDs can be detached from computers and can operate as USBs. They work similar as ordinary hard drives. It can store data, pee-pee a backup, bootable, disk cloning, formatting and all other ordinary...If you wish to get a full essay, order it on our website: Ordercustompaper.com



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