HP StorageWorks SAN Virtualization Services Platform Data Path Module User Guide (5697-0772, November 2010)

Each quad contains two front or host-facing ports, and two back or storage ports.
Each of these ports is capable of a 4 Gbit/s Fibre Channel rate. Therefore, using
additional quads may be necessary as a multiple of that 8 Gbit/s or 6.4 MB/s
rate.
RPO Recovery Point Objective. The point in time to which you must recover data as
defined by your organization. This is generally a definition of what an
organization determines is an acceptable loss in a distressed situation.
RTO Recovery Time Objective. The duration of time and a service level within which
a business process must be restored after a disaster to avoid unacceptable
consequences associated with a break in business continuity.
SAN Storage Area Network. A network specifically dedicated to the task of transporting
data between storage systems and servers. SANs are traditionally connected
over FC networks but have also been built using iSCSI technology.
secondary path For an active/passive device, the set of paths that are passive by default.
See also active/passive RAID, passive path, and primary path.
setup virtual disk A virtual disk that contains the virtualized VSM configuration for the SVSP domain,
including, for example, information about storage pools and virtual disks defined
on the domain.
SFP Small form-factor pluggable. The 2 Gbps or faster form factor of the removable
optical transceiver used by the Data Path Module, HBAs, and most Fibre Channel
switches. It uses the LC-type connector.
snapclone A VSM service that creates physical copies of VSM virtual disks without using
host resources.
snapshot Either of the following:
• A VSM service that creates multiple low-capacity, read-write snapshots of
virtual disks and makes the snapshots available to any number of hosts, for
purposes such as data recovery, backup and testing, while the original virtual
disk stays online and continues to be updated.
• A read-write entity that makes PiT data available to any host as a logical
drive.
SNMP Simple Network Management Protocol. The protocol used by the Data Path
Module to report exception conditions to third-party network management
applications.
SSH Secure Shell. A protocol and application for communicating with a remote
computer system. SSH is a more secure alternative to using telnet to communicate
with the Data Path Module.
storage pool In VSM, a set of back-end LUs or stripe sets from which you can create virtual
disks and allocate them to hosts. SVSP storage pools enable you to classify
storage elements into classes of service and provide different classes of service
to different hosts.
stripe set In VSM, a set of back-end LUs across which VSM stripes data, optionally used
to build storage pools.
SVSP domain Consists of all SVSP components and the storage they manage.
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