mapped | Mapped is capacity that is accessible by one or more hosts external to the array |
| (aggregated capacity of volumes that are accessible from hosts external to the |
| subsystem). |
meta device | This term is used by EMC. A meta device is a device that is a concatenation of several |
| devices. |
metavolume | Metavolumes are created from a disk, slice, stripe, or other metavolumes. Metavolumes |
| are extremely useful because they can expand their storage capacity, such as to |
| mainframe volume sizes. Also referred to “LDEVs” for HDS storage systems. |
missing element | The management server was able to discover the element, but it lost contact with the |
| element before more information could be gathered during “Get the Topology” or |
| Discovery Data Collection. A missing element can be managed if the management |
| server lost contact with the element after Discovery Data Collection was performed. |
multipathing | The process of providing a server more than one path to a storage system. So that in |
| the case of an emergency, the server will have continuous access to the storage system. |
| Multipathing can be done many ways. For example, you can provide redundant |
| switches for a server to access a storage system. Another example of multipathing is |
| providing redundant paths from the server to the switch. |
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|
P |
|
provider | A provider is software that is used to gather information about an element. |
proxy server | A device, such as a host, connected to a storage system. It is sometimes referred to as |
| a storage system proxy or an API proxy. An example of a proxy server is the EMC |
| Solutions Enabler or Hitachi HiCommand Device Manager. LSI storage systems do not |
| require a proxy, as they can be accessed directly. |
|
|
S |
|
SAN | A Storage Area Network (SAN) is a high speed network configuration that is |
| dedicated to transporting storage data among network devices, such as storage |
| systems, hosts (servers), switches, and tape libraries to end users. In addition to |
| connecting local elements to storage arrays, it may also be extended to off site or |
| remote locations for the purposes of backup, archival or acting as a hot site in the |
| event of a disaster. |
| A SAN can communicate via current technologies such as ESCON (mainframe), fibre |
| channel, or newer technology such as iSCSI. SAN’s can support several configurations |
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