Logical Unit - Hitachi AMS 2000 User Manual

collected together in one place. The file appears this way to users.
Physically, the elements of the file could live in segments across a disk.

logical unit

See logical unit number.
logical unit number (LUN)
An address for an individual disk drive, and by extension, the disk
device itself. Used in the SCSI protocol as a way to differentiate
individual disk drives within a common SCSI target device, like a disk
array. LUNs are normally not entire disk drives but virtual partitions (or
volumes) of a RAID set.
LU
Logical unit.
LUN
See logical unit number.
LUN Manager
This storage feature is operated through Storage Navigator Modular 2
software and manages access paths among host and logical units for
each port in your array.
M
metadata
In sophisticated data systems, the metadata -- the contextual
information surrounding the data -- will also be very sophisticated,
capable of answering many questions that help understand the data.
microcode
The lowest-level instructions directly controlling a microprocessor.
Microcode is generally hardwired and cannot be modified. It is also
referred to as firmware embedded in a storage subsystem.
Microsoft Cluster Server
Microsoft Cluster Server is a clustering technology that supports
clustering of two NT servers to provide a single fault-tolerant server.
mount
To mount a device or a system means to make a storage device
available to a host or platform.
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Hitachi AMS 2000 Family TrueCopy Extended Distance User Guide
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