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CH1 Internal PC Components 3 (Video Ports and Cables (Din-6 (This…

- - - - SATA 1 allows for a maximum data transfer rate of 1.5 Gb/s
    - - SATA 2 can reach up to 3 Gb/s
    - - SATA 3 is the fastest with speeds up to 6 Gb/s.
  - - - USB 3.0 and USB 3.1 are blue in color and have become popular for connecting external storage devices because of fast transmission rates.
        
        USB drives are also hot-swappable, which means that there is no need to reboot a computer when adding or removing a drive.
        
        A single USB port in a computer can theoretically support up to 127 separate devices with the use of USB hubs.
        
        A USB hub connects multiple USB devices. Finally, many devices can be powered through the USB port, eliminating the need for an external power source.
      - types of USB connectors.
        
        USB Type A.
        
        regular pc usb
        
        usb type b
        
        d shaped usb
        
        usb micro b
        
        commonly used for phones
        
        USB Mini B
        
        newest usb connector
        
        usb type c
        
        looks like usb micro b
  - - - Striping - Writes data across multiple drives.
      - Mirroring - Stores duplicate data on a second drive.
      - Parity - Detects data errors.
    - - data striping without redundancy
        
        highest peformance but not data protection, failure of one drive results in all loss of data
    - - disk mirroring
        
        high performance, high data protection because all data is duplicated
    - - error- correcting coding
        
        no longer used
        
        same performance can be achieved lower cost using raid 3
    - - byte- level data striping with dedicated parity
        
        for large sequential data requests
        
        does not support multiple, simultaneous read and write requests
    - - block-lvl data striping with dedicated parity
        
        supports multiple read requests, if a disk fails the dedicated parity disk is used to create a replacement disk
        
        block - level data striping with dedicated parity
    - - combination of data striping and parity
        
        supports multiple simultaneous reads and writes. data is written across all drives with parity
        
        write performance is slower than raid 0 and 1
- - - - USB 1.1 allowed transmission rates of up to 12 Mb/s in full-speed mode and 1.5 Mb/s in low-speed mode. A USB 1.1 cable has a maximum length of 9.8 ft (3 m). USB 2.0 allows transmission speeds up to 480 Mb/s. A USB 2.0 cable has a maximum length of 16.4 ft (5 m). USB devices can only transfer data up to the maximum speed allowed by the specific port. USB 3.0 allows transmission speeds up to 5 Gb/s. USB 3.0 is backward-compatible with previous versions of USB. A USB 3.0 cable does not have a maximum defined length, although a maximum length of 9.8 ft (3 m) is generally accepted.
    - - The IEEE 1394a standard supports data rates up to 400 Mb/s for cable lengths of 15 ft (4.5 m) or less. This standard uses a 4-pin or 6-pin connector. The IEEE 1394b (Firewire 800) standard allows for a greater range of connections, including CAT5 UTP and optical fiber. Depending on the media used, data rates are supported up to 3.2 Gb/s for distances of 328 ft (100 m) or less.