Both the Serial ATA (SATA) Hard disk and Parallel ATA (PATA) Hard disk are storage device which stores digital encoded data in a Computer. At the beginning Hard disk are made only for one purpose, i.e for storing digital encoded data in Computers but now a days the uses of it has expanded beyond computer to include Digital video recorders, Digital audio players, Personal digital assistants, Digital cameras and Video game consoles. In the year 2005 Samsung and Nokia design hard disk included mobile phone.
The main advantages of Serial ATA over the older Parallel ATA interface are faster Data Transfer, ability to add or take out devices from the system while operating (Hot swapping), thinner cables that lead air cooling work more efficiently and easier, and more reliable operation with tighter data integrity checks.
It was designed as a successor to the legacy Advanced Technology Attachment standard (ATA), and is expected to eventually replace the older technology (Retroactively renamed Parallel ATA or PATA). Serial ATA (SATA) adapters and devices communicate over a high-speed Serial cable.
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