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Computers(PC) rely on hard disk drives (HDDs) to store data permanently. They are storage devices wont to save and retrieve digital data which will be needed for future reference.

Hard drives are non-volatile, which means that they preserve data even after they don’t have power. The information stored remains safe and intact unless the hard disk drive(HDD) is destroyed or interfered with.

The information is stored or retrieved in a very random access manner as critical sequent access.  this suggests that blocks of data can be accessed at any time they’re needed while not probing different data blocks.

• Parallel Advanced Technology Attachment (PATA)
• Serial ATA (SATA)
• Small Computer System Interface (SCSI)
• Solid State Drives (SSD)

Parallel Advanced Technology Attachment (PATA)

These PATA (Parallel Advanced Technology Attachment) hard disk drives were introduced (all information of creation and modification) by Western Digital back in 1986. They provided a typical drive interface technology for connecting hard drives and alternative devices to computers. data transfer rate will go up to 133MB/s and a most of two devices may be connected to a drive channel. Most of the motherboards have a provision of two channels, thus a complete of 4 EIDE devices are often connected internally.

These styles of drives also are called Integrated Drive electronics (IDE) and increased Integrated Drive electronics (EIDE) drives. The labels relate to the sort of interface that’s used to attach the disk drive to the CPU board. These drives utilize either a 40 or an 80 wire cable with a broad 40-pin connective. 40 wire cables (Port cabling) are used in older and slower hard disks, whereas 80 wire cables (Port Cabling) are utilized in faster ones.

Nowadays, Parallel Advanced Technology Attachment(PATA) hard disks are being substituted by Serial Advanced Technology Attachment(SATA) hard disks. EIDE (increased Integrated Drive electronics) hard drives were introduced when some advancements in IDE hard disks, however, the term IDE refers to each IDE and EIDE (increased Integrated Drive electronics) disk drives.

Serial ATA Storage Drives(SATA)

These hard drives have replaced the PATA drives in desktop and portable computer computers. the most physical distinction between the two is that the interface, though their technique of connecting to a pc is that the same. Here are some benefits of SATA hard disk Drives. Worth noting is that their capacities vary a lot then does the costs. When shopping for a disk drive, you would like to understand its storage capability and the way a lot of storage you would like.

• SATA (Serial Advanced Technology Attachment) drives can transfer data faster than PATA (Parallel Advanced Technology Attachment) types by using serial signaling technology.
• SATA (Serial Advanced Technology Attachment) cables are thinner and more flexible than PATA (Parallel Advanced Technology Attachment) cables.
• They have a 7-pin data connection, with cable limit of 1 meter long distance.
• Disks do not share bandwidth because there is only one disk drive allowed per SATA (Serial Advanced Technology Attachment) controller chip on the computer motherboard.
• They consume less power. They only require 250 mV as opposed to 5V for PATA (Parallel Advanced Technology Attachment).

Small Computer System Interface(SCSI)

These are quite just like IDE hard drives however they create use of the small computer system Interface to attach to the PC. SCSI drives is connected internally or externally. Devices that are connected in a very SCSI have to be compelled to be terminated at the end. Here are a number of their benefits.

• They are faster.
• They are very reliable.
• Have a better scalability and flexibility in arrays(parallel store data).
• Well-adapted for storing and moving large amounts of data (Information).

Solid State Drives(SSD)

These are the latest in drive technology that we’ve within the IT industry. They are totally different from the opposite drives therein they are doing not contains moving parts. They also do not store data using magnetism. Instead, they make use of flash memory technology. They make use of integrated circuits or semiconductor devices to store data permanently, at least till they’re erased. Here are some of their benefits.

• Faster data access.
• Less susceptible to shock.
• Lower access times and latency.
• Less power usage