Serial ATA (SATA or Serial Advanced Technology Attachment) is a computer bus interface for connecting host bus adapters to mass storage devices such as hard disk drives and optical drives. Serial ATA was designed to replace the older parallel ATA (PATA) standard (often called by the old name IDE), offering several advantages over the older interface: reduced cable size and cost (7 conductors instead of 40), native hot swapping, faster data transfer through higher signalling rates, and more efficient transfer through an (optional) I/O queuing protocol.
SATA host-adapters and devices communicate via a high-speed serial cable over two pairs of conductors. In contrast, parallel ATA (the redesignation for the legacy ATA specifications) used a 16-bit wide data bus with many additional support and control signals, all operating at much lower frequency. To ensure backward compatibility with legacy ATA software and applications, SATA uses the same basic ATA and ATAPI command-set as legacy ATA devices.
eSATA- External Serial Advanced Technology Attachment
External SATA or eSATA allows users to benefit from SATA speeds outside the computer for storage devices. Standardized in 2004, eSATA is hot pluggable and can provide a performance increase over existing USB, 1394 and other older solutions. Speeds are claimed to be up to 6 times faster than USB 2.0 or 1394 devices. Peak Interface Speeds are rated at 300MBps. Real world speeds will depend on external factors such as Hard Drive speed and External Housing, and Cable Quality.
Specifications:
SATA 1.5Gb/s: Initial interface speed for 150MB/s data transfer rate
SATA 3Gb/s: Enhanced interface speed for 300MB/s data transfer rate, backward compatible
Shantanu
SATA host-adapters and devices communicate via a high-speed serial cable over two pairs of conductors. In contrast, parallel ATA (the redesignation for the legacy ATA specifications) used a 16-bit wide data bus with many additional support and control signals, all operating at much lower frequency. To ensure backward compatibility with legacy ATA software and applications, SATA uses the same basic ATA and ATAPI command-set as legacy ATA devices.
eSATA- External Serial Advanced Technology Attachment
External SATA or eSATA allows users to benefit from SATA speeds outside the computer for storage devices. Standardized in 2004, eSATA is hot pluggable and can provide a performance increase over existing USB, 1394 and other older solutions. Speeds are claimed to be up to 6 times faster than USB 2.0 or 1394 devices. Peak Interface Speeds are rated at 300MBps. Real world speeds will depend on external factors such as Hard Drive speed and External Housing, and Cable Quality.
Specifications:
SATA 1.5Gb/s: Initial interface speed for 150MB/s data transfer rate
SATA 3Gb/s: Enhanced interface speed for 300MB/s data transfer rate, backward compatible
Shantanu
0 comments:
Post a Comment