HP StorageWorks 8000 - NAS User Manual page 228

Group Identification Group Identification Group Identification Group Identification
(GID) (GID)
(GID) (GID)
Group quota Group quota
Group quota Group quota
Heartbeat Heartbeat Heartbeat Heartbeat
High availability High availability High availability High availability
Host Bus Adapter Host Bus Adapter
Host Bus Adapter Host Bus Adapter
(HBA) (HBA) (HBA) (HBA)
Hot swapping Hot swapping Hot swapping Hot swapping
Hub Hub Hub Hub
IP address IP address
IP address IP address
226 Glossary
networking. The data transfer rate is one gigabit per second (1 Gbps) or
more.
A number in the UNIX environment that identifies a group of individuals or
services to a computer system.
Lets you restrict the space usage on the NAS server for groups.
H
A periodic signal generated by the server to indicate that it is still running.
High availability characterizes a system that is designed to avoid the loss of
service by reducing or managing failures and minimizing downtime. High
availability implies a service level in which both planned and unplanned
downtime does not exceed a small stated value.
An HBA is an I/O adapter that sits between the host computer's bus and the
Fibre Channel loop and manages the transfer of information between the two
channels. In order to minimize the impact on host processor performance, the
host bus adapter performs many low-level interface functions automatically or
with minimal processor involvement.
A feature that allows equipment to be connected to an active device, such as
a computer, while the device is powered on.
A fibre channel device that connects nodes into a logical loop by using a
physical star topology. Hubs will automatically recognize an active node and
insert the node into the loop. A node that fails or is powered off is
automatically removed from the loop.
I
A unique 32-bit value that identifies network hosts using TCP/IP. An IP
address, or block of addresses, is assigned upon application to organizations
responsible for that function. No two network hosts can be assigned the same
IP address. Each address consists of a network number, optional subnetwork
number and host number, written as four numbers separated by periods.
Each number can be 0 to 255.