HP StorageWorks Data Replication Manager HSG80 ACS Version 8.7P Configuration Guide (AA-RPHZF-TE, March 2004)

Glossary
239Data Replication Manager HSG80 ACS Version 8.7P Configuration Guide
chunk size
The number of data blocks, assigned by a system administrator, that are written to the
primary RAIDset or stripeset member before the remaining data blocks are written to the next RAIDset or
stripeset member. Nondefault chunk size values must be exactly divisible by 8.
CLI
An acronym for command line interface. The CLI is the configuration interface to operate the controller
software.
clone
A utility that physically duplicates data on any unpartitioned single-disk unit, stripeset, mirrorset, or striped
mirrorset.
command line interface
See CLI.
connection
As applied to the Data Replication Manager, this refers to a connection between two-end Fibre Channel ports.
An example would be the connection between a host bus adapter (by way of the Fibre Channel switches) and the
HSG80 controller.
CLI commands available on the HSG80 are
ADD CONNECTIONS, SET connection_name.
See also link.
container
1. Any entity that is capable of storing data, whether it is a physical device or a group of physical devices.
2. A virtual internal controller structure representing either a single disk or a group of disk drives linked as a
storageset. Examples of storageset containers that the controller uses to create units include stripesets and
mirrorsets.
controller
A hardware device that uses software to facilitate communications between a host and one or more storage
devices organized in an array. The HS-series StorageWorks™ family of controllers are all array controllers.
copying member
In a mirrorset, a copying member is a container introduced to the mirrorset after the mirrorset has already been
in use. None of the blocks can be guaranteed to be the same as other members of the mirrorset. Therefore the
copying member is made the same by copying all the data from a normal member. This is in contrast to
normalization, where all blocks written since creation are known to be the same.
When all of the blocks on the copying member are the same as those on the normal member, the copying
member becomes a normal member. Until it becomes a normal member, the copying member contains
undefined data and is not useful for any purpose.
DataSafe
Also known as firewall for Microsoft Windows 2000 and NT. This pre-tested configuration uses specific
hardware, Data Replication Manager software, and installation practices to protect operations from hardware or
software outages. The solution includes No Single Point of Failure (NSPOF) functionality.
default gateway
The default path that a computer or router uses to forward and route data between two or more networks having
different protocols.
device
See node, peripheral device.