HP StorageWorks Command Console V2.5 User Guide (AA-RV1UA-TE, March 2005)

Glossary
128 Command Console V2.5 User Guide
Asynchronous Event
Service (AES)
AES, which runs as a service in the background, collects and
passes all traps from the subsystems to the appropriate
Navigation trees and individual pagers. AES needs to be
running for the Client to receive updates.
available A state in which a device is operational but not yet in use as a
member of a virtual disk.
Bad Block Replacement
(BBR)
Substitution of defect-free device blocks for defective ones.
The procedure used to locate a replacement block, mark a bad
block as replaced, and move data from the bad block to the
replacement block. In some controllers this process occurs
automatically.
block Consecutive bytes of data stored on a storage device. In most
subsystems, a block is the same size as a physical disk sector.
blower An airflow device mounted in a device or controller shelf.
cache A fast temporary storage buffer in a controller or computer.
capacity The total amount of data that a physical or virtual disk can
store.
channel A SCSI device bus. Narrow SCSI device buses support up to 7
devices, and wide buses support up to 15 devices. Also called a
“port.”
chunk HS-series controller term for strip.
chunk size HS-series controller term for strip size.
Client The Command Console uses its associate program -- Agent --
for network connections to multiple subsystems. The Client can
use either a serial maintenance port or a host SCSI bus
connection to connect to a single subsystem. From the Client,
you can view multiple storage systems and set up pager
notification.
client list List of Client nodes that are allowed to connect to an Agent
over the network. The list is maintained in the client.ini file on
the host where the Agent is installed. A client list entry includes
the TCP/IP address or network name and the allowed access
level for the host's subsystems of each Client.
client system Computer on which the Client software is installed.