IBM 2145UPS-1U Hardware Installation Manual page 219

storage area network (SAN)
A network whose primary purpose is the transfer of data between
computer systems and storage elements and among storage elements. A
SAN consists of a communication infrastructure, which provides physical
connections, and a management layer, which organizes the connections,
storage elements, and computer systems so that data transfer is secure and
robust. (S)
Storage Management Initiative Specification (SMI-S)
A design specification developed by the Storage Networking Industry
Association (SNIA) that specifies a secure and reliable interface that allows
storage management systems to identify, classify, monitor, and control
physical and logical resources in a storage area network. The interface is
intended as a solution that integrates the various devices to be managed in
a storage area network (SAN) and the tools used to manage them.
Storage Networking Industry Association (SNIA)
An association of producers and consumers of storage networking
products whose goal is to further storage networking technology and
applications. See www.snia.org.
striped
Pertains to a virtual disk (VDisk) that is created from multiple managed
disks (MDisks) that are in the MDisk group. Extents are allocated on the
MDisks in the order specified.
stripeset
See RAID 0.
subsystem device driver (SDD)
An IBM pseudo device driver designed to support the multipath
configuration environments in IBM products.
superuser authority
The level of access required to add users.
suspended
The status of a pair of virtual disks (VDisks) that have a copy relationship
that has been temporarily broken because of a problem.
switch A network infrastructure component to which multiple nodes attach.
Unlike hubs, switches typically have internal bandwidth that is a multiple
of link bandwidth, and the ability to rapidly switch node connections from
one to another. A typical switch can accommodate several simultaneous
full link bandwidth transmissions between different pairs of nodes. (S)
Contrast with hub.
symmetrical network
A network in which all the initiators are connected at the same level and
all the controllers are connected at the same level.
symmetric virtualization
A virtualization technique in which the physical storage in the form of
Redundant Array of Independent Disks (RAID) is split into smaller chunks
of storage known as extents. These extents are then concatenated, using
various policies, to make virtual disks (VDisks). See also asymmetric
virtualization.
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Glossary