hard disk drive (HDD) A computer hard disk drive (HDD) is a non-volatile memory hardware device that controls the positioning, reading and writing of the hard disk, which furnishes data storage. Hard disk drives are commonly used as the main storage device in a computer. HDDs often store operating system, software programs and other files, and can be found in desktop computers, mobile devices, consumer electronics and enterprise storage arrays in data centers.
A hard disk drive -- often shortened to hard drive -- and hard disk are not the same things, but they are packaged as a unit and either term can refer to the whole unit.
In a computer, an HDD is commonly found in the drive bay and is connected to the motherboard via an ATA, SATA or SCSI cable. The HDD is also connected to a power supply unit and can keep stored data while powered down.
Hard disk drive components and how it works
Most basic hard drives consist of a number of disk platters that are positioned around a spindle inside a sealed chamber. The chamber also includes read-and-write heads and motors.
The motor is used to spin the platters, which hold the data, at up to 15,000 rotations per minute (a higher rpm number results in faster performance). As the platters spin, a second motor controls the position of the read-and-write heads that magnetically record information to, and read information from, tracks on each platter.
External HDDs
Most HDDs are found internally in a computer and work as stated above. However, individuals can also purchase external hard drives. External hard drives can be used to expand the storage capacity, or act as a portable place to back data up to. An external hard drive can connect to a computer or device through a USB 2.0 interface or with eSATA. External hard drives may also have slower data transfer rates compared to internal HDDs.
History of hard disk drives
The hard disk was created in 1953 by engineers at IBM who wanted to find a way to provide random access to high capacities of data at a low cost. The disk drives developed were the size of refrigerators, could store 3.75 megabytes of data and began shipping in 1956. Memorex, Seagate and Western Digital were other early vendors of hard disk drive technology.
Hard disk drive form-factor size has continued to decrease as the technology evolves. By the mid-1980s, 3.5-inch and 2.5-inch form factors were introduced, and it was at this time they first became a standard in personal computers (PCs).
Hard disk drive density has increased since the technology was first developed. The first hard disk drives were able to store megabytes of data, while today they are in the terabyte (TB) range. Hitachi released the first 1 TB hard drives in 2007. In 2015, HGST announced the first 10 TB hard drive.
HDD technology developments
In 2013, Seagate announced hard disk drives that use shingled magnetic recording (SMR) technology. SMR increases storage density in hard disk drives by layering the magnetic tracks on each disk, rather than placing them parallel to each other. It is referred to as shingled because the tracks overlap similar to shingles on a roof.
Please watch the FULL VIDEO to know , How it Works .
*********************************************************************
Don't forgot to LIKE||SHARE||SUBSCRIB
#Tech #Technology #Tricks #Tips #Hacks #Edits #How #To #Android #Iphone #Ios #Mobile #Laptop #Computer #Youtube #Google #Facebook
#Instagaram #Twitter #Tamil #English #Videos #Review #Unboxing #New #Multimedia #tamil #thittachery #nagapattinam #tamilnadu #hdd #harddisk #hard #disk #drive #harddrive
********************************************************************
Friends, Please Subscribe for More Videos..
YouTube :
*********************************************************************
If you have any questions feel free to ask them in the comment box below!
*********************************************************************
Follow Me:
Twitter :
Facebook Page :
instagram :
*********************************************************************
More Tutorials of JA Technology
HTML Tutorial :
Java Tutorial :
Mobile Tricks And Tips :
Pc Trick And Tips :
Internet Tricks And Tips :
Photoshop Tutorial :
Top 10 And 5 :
0 Comments