Introduction - The hard drive of a computer is a device that stores all the software installed on a computer, as well as all the data files created and used by this software.
- This includes any documents you have created and downloaded, such as photos and music. The hard drive is a form of permanent storage, rather than temporary memory such as random-access memory (RAM).
- There are two general types of hard drives: hard disk drives (HDD), which use one or more rotating discs and rely on magnetic storage, and solid-state drives (SDD), which have no moving mechanical parts, but use flash memory like the kind found in USB flash drives.
- If you have a regular desktop computer, you most likely have a hard disk drive. Solid-state drives are used more typical for high-end, expensive laptops.
Hard Disk Drive Basic Features of Hard Disk - Capacity
- Revolutions Per Minute, (RPM)
- Form Factor
- Disk Buffer
- Interface Type
Capacity - Capacity is the maximum amount of data a hard disk can store. Typical hard disk storage capacities today are either in gigabytes or terabytes.
- These sizes store enormous amounts of data and this is very useful when saving music and video, especially video files, which can get very large.
- In 2014 Seagate produced the world’s first 8 Terabytes Hard disk and in 2016 it produced the world’s largest disk i.e. 60TB SSD. Samsung produced a 15 SSD in 2015
Revolutions Per Minute (RPM) - Within a hard disk case are round platters (the actual disks) that are attached to a spindle that spins. The disks are written to or read from while spinning. One revolution is how many times the platters make a complete rotation. Stored in sectors and tracks
- Disks in a HDD literally rotate thousands of times per minute. The greater the RPM, the faster data is read or written. 7200 RPM is typically what you will see in most computer hard drives.
- High end server hard disk typically have 15,000 RPM
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