? A hard drive stores the data a computer needs to boot the operating system and run native and third-party applications. Notebooks manufactured before 2003 contain IDE hard drives, but the release of the SATA interface changed the type of hard drives computers use.
Interface standards for hard drives (HDD) are SATA and IDE. SATA, or Serial Advanced Technology Attachment , transfers data one bit at a time. IDE, or integrated drive electronics and which is also known as PATA or Parallel ATA, transfers 16 bits of data at a time. hard drives
desktop SATA are 3.5 inches in size and have two small interface connections on the back. One fits a SATA data cable and the other a SATA power cable. IDE hard drives are Notebook 2.5 or 1.8 inches in size and have a 44-pin connector on the back.
Desktop hard drives tend to have a higher RPM (revolutions per minute) than portable hard drives, allowing the former to access and read data at a faster rate. SATA hard drives also transfer data at speeds anywhere from up to 150MB/s (megabytes per second) to 600MB/s. The largest 133MB/s IDE hard drive covers.
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