Glossary, Continued
Logical Disk | A set of contiguous chunks on a physical disk. Logical disks are used in array |
| implementations as constituents of logical volumes or partitions. Logical disks are |
| normally transparent to the host environment, except when the array containing them is |
| being configured. |
Logical Drive | A virtual drive within an array that can consist of more than one physical drive. Logical |
| drives divide the contiguous storage space of an array of disk drives or a spanned group |
| of arrays of drives. The storage space in a logical drive is spread across all the physical |
| drives in the array or spanned arrays. Configure at least one logical drive for each array. |
Mapping | The conversion between multiple data addressing schemes, especially conversions |
| between member disk block addresses and block addresses of the virtual disks presented |
| to the operating environment by Array Management Software. |
MB | (Megabyte) An abbreviation for 1,000,000 (10 to the sixth power) bytes. It is the same as |
| 1,000 KB (kilobytes). |
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
Cont’d
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