HP Hitachi Dynamic Link Manager Software - Manual (Page 737)

D. Glossary
713
physical path
An access path from a host to an LU. A path name is used to identify a physical path.
Q
QEMU
A virtual emulator available for the entire host system.
(See also: KVM)
R
reservation
The reservation function enables a host to declare that it has exclusive rights to use a
particular LU, and prevents other hosts from accessing that LU. Access permission for
an LU that has been reserved is given only to the host that issued the reservation, so
the LU cannot be accessed from multiple paths (coming from multiple hosts)
simultaneously. However, because of this, load balancing is not possible.
(See also: persistent reservation)
S
SAN (Storage Area Network)
A high-speed network connecting hosts to storage systems. This network is
independent of a LAN and is dedicated to data transfers. A SAN provides faster access
to storage systems, and prevents the transfer of high-volumes of data from
deteriorating LAN performance.
SCSI device
A SCSI disk device.
SLPR (Storage Logical Partition)
A function supported by Hitachi USP, Universal Storage Platform V/VM and Virtual
Storage Platform for logically splitting up a storage system. This function splits up the
resources, such as ports, CLPR, and volumes, in the storage system, so that the user
can manage each resource independently.
X
Xen
Software that provides a virtual environment in Linux.