Storage is a process through which digital data is
saved within a data storage device by means of
computing technology. Storage is a mechanism that
enables a computer to retain data, either temporarily
Storage devices such as flash drives and hard disks
are a fundamental component of most digital devices
since they allow users to preserve all kinds of
information such as videos, documents, pictures and
Storage may also be referred to as computer data
storage or electronic data storage.
› THERE ARE MANY TYPE OF STORAGE
SYSTEM IN COMPUTER, SOME ARE
HARD DISK DRIVE
SOLID STATE DIVE
A computer hard disk drive (HDD)
is a non-volatile data storage
device. Non-volatile refers to
storage devices that maintain
stored data when turned off. All
computers need a storage device,
and HDDs are just one example of
a type of storage device.
HDDs are usually installed inside
desktop computers, mobile devices,
consumer electronics and
enterprise storage arrays in data
centers. They can store operating
systems, software programs and
other files using magnetic disks.
An SSD, or solid-state drive, is a
type of storage device used in
computers. This non-volatile
storage media stores persistent
data on solid-state flash memory.
SSDs replace traditional hard disk
drives (HDDs) in computers and
perform the same basic functions
as a hard drive. But SSDs are
significantly faster in comparison.
With an SSD, the device's
operating system will boot up more
rapidly, programs will load quicker
and files can be saved faster.
A traditional hard drive consists of a
spinning disk with a read/write head
on a mechanical arm called
an actuator. An HDD reads and
writes data magnetically. The
magnetic properties, however, can
lead to mechanical breakdowns.
By comparison, an SSD has no
moving parts to break or spin up or
down. The two key components in
an SSD are the flash controller
and NAND flash memory chips.
This configuration is optimized to
deliver high read/write performance
for sequential and random data
A compact disc is a portable
storage medium that can be used
to record, store and play
back audio, video and other data
in digital form.
A standard compact disc measures
4.7 inches, or 120 millimeters (mm),
across, is 1.2 mm thick, weighs
between 15 grams and 20 grams,
and has a capacity of 80 minutes of
audio, or 650 megabytes (MB) to
700 MB of data.
A CD works by focusing a
780 nanometer wavelength semico
nductor laser onto a single track of
the disc. As the disc rotates, the
laser beam measures differences in
the way light is reflected off the
polycarbonate layer on the bottom
of the disc, converting it to sound.
CDs are fragile and prone to
scratches; they can be repaired, but
disc readability may be affected.
A USB flash drive -- also known as
a USB stick, USB thumb drive or
pen drive -- is a plug-and-play
portable storage device that
uses flash memory and is
lightweight enough to attach to a
keychain. A USB flash drive can be
used in place of a compact disc.
When a user plugs the flash
memory device into the USB port,
the computer's operating system
(OS) recognizes the device as
a removable drive and assigns it a
o A USB flash drive can store computer
problems or launch an OS from a bootable
USB. The drives support Microsoft
Windows, Linux, MacOS, different flavors
of Linux and many BIOS boot ROMs.
The first USB flash drive came on
the market in 2000 with a storage
capacity of 8 megabytes (MB).
Drives now come in capacities
ranging between 8 gigabytes (GB)
and 1 terabyte (TB), depending on
manufacturer, and future capacity
levels are expected to reach 2 TB.
The memory within most USB flash
drives is multi-level cell (MLC),
which is good for 3,000 to
5,000 program-erase cycles.
However, some drives are designed
with single-level cell (SLC) memory
that supports approximately
What is a database?
A database is information that is set up
for easy access, management and
updating. Computer databases typically
store aggregations of data records
or files that contain information, such as
sales transactions, customer data,
financials and product information.
Databases are used for storing,
maintaining and accessing any sort of
data. They collect information on
people, places or things. That
information is gathered in one place so
that it can be observed and analyzed.
Databases can be thought of as an
organized collection of information.
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