HP EVA P6000 User Manual page 290

redundant power A capability of the Enterprise storage system racks and enclosures to allow continuous system
configuration operation by preventing single points of power failure.
reporting group An Enterprise Storage System controller pair and the associated disk drive enclosures. The
Enterprise Storage System controller assigns a unique decimal reporting group number to each
EMU on its loops. Each EMU collects disk drive environmental information from its own
sub-enclosure and broadcasts the data over the enclosure address bus to all members of the
reporting group. Information from enclosures in other reporting groups is ignored.
RoHS Reduction of Hazardous Substances.
room temperature See
RPO Recovery point objective. The maximum age of the data you want the ability to restore in the
event of a disaster. For example, if your RPO is six hours, you want to be able to restore systems
back to the state they were in as of no longer than six hours ago. To achieve this objective, you
need to make backups or other data copies at least every six hours.
S
SCSI 1.
2.
SCSI-3 The ANSI standard that defines the operation and function of Fibre Channel systems.
SCSI-3 Enclosure See SES.
Services
selective The process whereby a controller presents a virtual disk only to the host computer which is
presentation authorized access.
serial transmission A method of transmission where each bit of information is sent sequentially on a single channel,
not simultaneously on all channels as occurs in parallel transmission.
SES SCSI-3 Enclosures Services. Those services that establish the mechanical environment, electrical
environment, and external indicators and controls for the proper operation and maintenance of
devices within an enclosure.
SFP Small form-factor pluggable transceiver.
solid state disk A high-performance storage device that contains no moving parts. SSD components include either
(SSD) DRAM or EEPROM memory boards, a memory bus board, a CPU, and a battery card.
SSN Storage System Name. An HP P6000 Command View-assigned, unique 20-character name that
identifies a specific storage system.
storage carrier See carrier.
storage pool The aggregated blocks of available storage in the total physical disk array.
storage system See array.
Storage System See SSN.
Name
switch An electronic component that switches network traffic from one connection to another.
290 Glossary
For a rack, two AC power sources and two power conditioning units distribute primary and
redundant AC power to enclosure power supplies.
For a controller or drive enclosure, two power supplies ensure that the DC power is available
even when there is a failure of one supply, one AC source, or one power conditioning unit.
Implementing the redundant power configuration provides protection against the loss or
corruption of data.
ambient temperature.
Small Computer System Interface. An American National Standards Institute (ANSI) interface
which defines the physical and electrical parameters of a parallel I/O bus used to connect
computers and a maximum of 16 bus elements.
The communication protocol used a controller pair and the hosts. Specifically, the protocol
is Fibre Channel drive enclosure or SCSI on Fibre Channel. SCSI is the higher command-level
protocol and Fibre Channel is the low-level transmission protocol. The controllers have full
support for SCSI-2; additionally, they support some elements of SCSI-3.