C30 Ch6 Hard Drive Glossary

  1. ATAPI
    (Advanced Technology Attachment Packet Interface) An interface standard, part of the IDE/ATA standards, that allows tape drives, optical drives, and other drives to be treated like an IDE hard drive by the system.
  2. DMA
    (direct memory access) transfer mode A transfer mode used by devices, including the hard drive, to transfer data to memory without involving the CPU.
  3. EIDE
    Enhanced IDE, PATA standard that supports the configuration of four IDE devices in a system.
  4. eSATA
    external SATA- A standard for external drives based on SATA that uses a special external shielded SATA cable up to 2 meters long. eSATA is up to six times faster than USB or FireWire.
  5. fault tolerance
    The degree to which a system can tolerate failures. Adding redundant components, such as disk mirroring or disk duplexing, is a way to build in fault tolerance.
  6. FDD
    floppy disk drive - A drive that can hold either a 5½ inch or 3¼ inch floppy disk. Also called floppy drive.
  7. HDD
    hard disk drive- See hard drive.
  8. hard drive
    The main secondary storage device of a computer. Two technologies are currently used by hard drives: magnetic and solid state. Also called hard disk drive (HDD).
  9. host adapter
    The circuit board that controls a SCSI bus supporting as many as seven or fifteen separate devices. The host adapter controls communication between the SCSI bus and the computer.
  10. hot-swapping
    Allows you to connect and disconnect a device while the system is running.
  11. IDE
    (Integrated Drive Electronics or Integrated Device Electronics) A hard drive whose disk controller is integrated into the drive, eliminating the need for a controller cable and thus increasing speed, as well as reducing price. See also EIDE.
  12. low-level formatting
    A process (usually performed at the factory) that electronically creates the hard drive tracks and sectors and tests for bad spots on the disk surface.
  13. magnetic hard drive
    One of two technologies used by hard drives where data is stored as magnetic spots on disks that rotate at a high speed. The other technology is solid state drive (SSD).
  14. mirrored volume
    The term used by Windows for the RAID 1 level that duplicates data on one drive to another drive and is used for fault tolerance.
  15. NAND flash memory
    The type of memory used in SSD drives. NAND stands for “Not AND” and refers to the logic used when storing a one or zero in the grid of rows and columns on the memory chip.
  16. PATA
    parallel ATA - An older IDE cabling method that uses a 40-pin flat or round data cable or an 80-conductor cable and a 40-pin IDE connector. See also serial ATA.
  17. RAID
    (redundant array of inexpensive disks or redundant array of independent disks) Several methods of configuring multiple hard drives to store data to increase logical volume size and improve performance, or to ensure that if one hard drive fails, the data is still available from another hard drive.
  18. read/write head
    A sealed, magnetic coil device that moves across the surface of a disk in a hard disk drive (HDD) either reading data from or writing data to the disk.
  19. ReadyDrive
    The Windows 7/Vista technology that supports a hybrid hard drive.
  20. S.M.A.R.T.
    (Self-Monitoring Analysis and Reporting Technology) A system BIOS and hard drive feature that monitors hard drive performance, disk spin up time, temperature, distance between the head and the disk, and other mechanical activities of the drive in order to predict when the drive is likely to fail.
  21. SCSI
    (Small Computer System Interface) A fast interface between a host adapter and the CPU that can daisy chain as many as 7 or 15 devices on a single bus.
  22. SATA
    serial ATA - An ATAPI interface standard that uses a narrower and more reliable cable than the 80-conductor cable and is easier to configure than PATA systems. See also parallel ATA.
  23. SSD
    solid state device - An electronic device with no moving parts. A storage device that uses memory chips to store data instead of spinning disks (such as those used by magnetic hard drives and CD drives). Examples of solid state devices are jump drives (also called key drives or thumb drives), flash memory cards, and solid state disks used as hard drives in notebook computers designed for the most rugged uses. Also called solid state disk (SSD) or solid state drive (SSD).
  24. SSD
    solid state drive - A hard drive that has no moving parts. Also see solid state device (SSD).
  25. spanning
    Using a spanned volume to increase the size of a volume.
  26. terminating resistor
    The resistor added at the end of a SCSI chain to dampen the voltage at the end of the chain.
Card Set
C30 Ch6 Hard Drive Glossary
C30 Ch6 Hard Drive Glossary