HP EVA P6000 Storage User Manual
Page 308
redundant power
configuration
A capability of the Enterprise storage system racks and enclosures to allow continuous system
operation by preventing single points of power failure.
•
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.
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
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.
1.
2.
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.
SCSI-3
The ANSI standard that defines the operation and function of Fibre Channel systems.
SCSI-3 Enclosure
Services
See
.
selective
presentation
The process whereby a controller presents a virtual disk only to the host computer which is
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
(SSD)
A high-performance storage device that contains no moving parts. SSD components include either
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
.
storage pool
The aggregated blocks of available storage in the total physical disk array.
storage system
See
Storage System
Name
See
switch
An electronic component that switches network traffic from one connection to another.
308 Glossary