Mbyte | (Megabyte) An abbreviation for 1,000,000 (10 to the sixth power) bytes. |
| One Mbyte equals 1,000 Kbytes (kilobytes). |
Having multiple concurrent or | |
| Used to describe processes in computer systems. |
| processes allow |
| array to increase I/O performance. |
Operating Environment
The operating environment includes the host computer where the array is attached, any I/O buses and adapters, the host operating system, and any additional software required to operate the array. For
Parity | Parity is an extra bit added to a byte or word to reveal errors in storage |
| (in RAM or disk) or transmission. Parity is used to generate a set of |
| redundancy data from two or more parent data sets. The redundancy |
| data can be used to reconstruct one of the parent data sets, although it |
| does not fully duplicate the parent data sets. In RAID, this method is |
| applied to entire drives or stripes across all disk drives in an array. Parity |
| data is distributed among all the drives in the system. If a single disk |
| drive fails, the drive can be rebuilt from the parity of the respective data |
| on the remaining drives. |
Partition | An array virtual disk made up of logical disks rather than physical ones. |
| Also known as logical volume. |
Physical Disk | A hard disk drive that stores data. A hard disk drive consists of one or |
| more rigid magnetic discs rotating about a central axle with associated |
| read/write heads and electronics. |
Physical Disk | The ability of some adapters to detect when disk drives have been |
Roaming | moved to a different slot in the |
Protocol | A set of formal rules describing how to transmit data, especially across |
| a network. Low level protocols define the electrical and physical |
| standards to be observed, bit- and byte- ordering, and the transmission |
| and error detection and correction of the bit stream. High level protocols |
| deal with the data formatting, including the message syntax, the terminal- |
|
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