Hard disk drive (HDD) assignment help
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. Hard disk drive (HDD) assignment are challenging to students all over the world. This is because of their busy schedule of activities. Thus, assignmentsguru are here to help you get top notch assignments
A hard disk drive and a hard disk are not the same thing, 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 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.
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
Hard disks are tools used to store, retrieve, and manage large amounts of data. The first hard disks were made out of alloys in 1953 by IBM engineers who wanted to find a solution for storing data on larger capacities at a lower cost. Hard disks are the largest storage devices used on computers today and began shippingMemorex, Seagate and Western Digital were other early vendors of hard disk drive technology.
Hard disk drive form factors have continued to decrease over the past decades as the technology has evolved. It was first introduced in 1985 with 3.5-inch and 2.5-inch form factors, which are now commonly found in personal computers (PCs).
Hard disk drive density has continued to increase over the years. The first hard disk drives were able to store megabytes of data while today they are in the terabyte range. Hitachi released the first 1 TB hard drives
n 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 technology. This technology 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.
Helium-filled hard disk drives were first announced in 2012. Helium is less dense, cooler and lighter than air, and can, therefore, consume less power, increase drive density and improve performance compared with traditional hard disk drives. In 2016, Seagate announced its own 10 TB helium hard drive.
HDD vs. SSD
The main alternative to hard disk drives in PCs and the enterprise are solid-state drives (SSDs). HDDs are now starting to be replaced by SSDs.
SSDs contain no moving parts and have lower latency than HDDs, which often make them a preferred storage option for applications that need to be accessed quickly and that have a high input/output demand. SSDs are configured to deliver high read and write performance for sequential and random data requests. Additionally, SSDs don’t store data magnetically, so the read performance remains steady, regardless of where the data is stored on the drive.
However, SSDs are more expensive than HDDs from a price-per-gigabyte standpoint. Many enterprise storage arrays ship with a mix of HDDs and SSDs to reduce costs while providing better performance. SSDs also have a set life expectancy, having a finite number of write cycles before performance slows. This detrition happens faster than how long it takes for an HDD to fail over time.
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