HP StorageWorks 6400/8400 - Enterprise Virtual Array User Manual page 143

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.
room temperature See
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
presentation which is authorized access.
serial transmission A method of transmission in which each bit of information is sent sequentially
on a single channel rather than simultaneously as 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.
small computer See SCSI.
system interface
Snapclone A virtual disk that can be manipulated while the data is being copied. Only an
Active member of a virtual disk family can be snapcloned.
The Snapclone, like a snapshot, reflects the contents of the source virtual disk at
a particular point in time. Unlike the snapshot, the Snapclone is an actual clone
of the source virtual disk and immediately becomes an independent Active
member of its own virtual disk family.
snapshot A temporary virtual disk (Vdisk) that reflects the contents of another virtual disk
at a particular point in time. A snapshot operation is only done on an active
virtual disk. Up to seven snapshots of an active virtual disk can exist at any point.
The active disk and its snapshot constitute a virtual family.
See also
SSN Storage System Name. An HP Command View EVA-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.
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 ele-
ments.
The communication protocol used between 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.
active virtual disk, virtual disk
HP StorageWorks 6400/8400 Enterprise Virtual Array user guide
copy, and virtual disk family.
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