User`s guide

LUN
A logical unit number is a physical or virtual peripheral device addressable
through a target. LUNs use their target’s bus connection to communicate on the
SCSI bus.
maintenance terminal
Any EIA–423 compatible terminal to be plugged into the HS controller.
This terminal is used to identify the controller, enable host paths, define
the configuration, and check controller status. It is not required for normal
operations. It is sometimes referred to as a local terminal.
MB
The standard abbreviation for megabyte, 1024 kilobytes.
MB/s
The standard abbreviation for megabytes per second.
metadata
Data written on the physical disk that is not visible to the host/customer that
allows the HS array controller to maintain a high integrity of customer data.
mirrorsets
Two or more physical disks configured to present one highly reliable virtual unit
to the host. NORMAL member, see NORMAL. NORMALIZING member, see
NORMALIZING.
MSCP
Mass Storage Control Protocol. The protocol by which blocks of information are
transferred between the host and the controller.
nonredundant
A single controller configuration. A controller configuration which does not
include an second backup controller permitting failover in the event of a failure.
NORMAL
A mirrorset term for a mirrorset member whose entire contents is guaranteed to
be the same as all other NORMAL members. All NORMAL members are exactly
equivalent.
NORMALIZING
A mirrorset term for a mirrorset member whose contents is the same as all other
NORMAL and NORMALIZING members for data that has been written since the
mirrorset was created or lost cache data was cleared. Data that has never been
written may differ among NORMALIZING members.
NV
Nonvolatile. A term used to describe memory, the contents of which survive loss
of power.
Glossary–5