Dell IP4700 Installation And Service Manual page 122

Glossary
server In the context of storage systems, a processor that runs an operating
system and uses a disk-array storage system for data storage and
retrieval.
SFF Small Form Factor Committee
share The process by which you make CIFS files on one host available to
another host. This term also refers to the shared directory itself (you
create a share; you share a directory). Files in the directory are shared
among user groups specified in permissions and access.
shelf Common functional components in either a DPE or DAE. for
example, a shelf can consist of disks and their supporting hardware
or storage processors and their supporting hardware. In an IP4700,
the first shelf is always shelf 0 and contains SP A and SP B
SP (storage See storage processor (SP).
processor)
SPS (standby power A unit (otherwise known as a battery backup unit) that provides
supply) backup power in case of a power outage. An SPS is required for
storage-system write caching. If power fails, the SPS allows the
storage processor to write the data from its cache to disk. You can
replace an SPS under power, without interrupting applications.
storage processor A printed-circuit board with memory modules and control logic that
(SP) manages the file system I/O between the clients and the disk
modules. For higher availability and greater flexibility, an IP4700 uses
a second storage processor.
storage-system The procedure of storing disk-based data in RAM memory (in this
caching case, RIMM memory on an storage processor) temporarily to save
time if the data needs to be accessed or changed again soon.
V
volume A logical disk drive that is built across a group of disks and is
permanently associated with one of the storage processors. You store
directories and files in the volumes you create.
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