Hitachi MK-97DF8018-00 User Manual
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Glossary–9
Hitachi Simple Modular Storage Copy-on-Write SnapShot User’s Guide
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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.
mount point
The location in your system where you mount your file systems or
devices. For a volume that is attached to an empty folder on an NTFS
file system volume, the empty folder is a mount point. In some systems
a mount point is simply a directory.
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pair
Refers to two logical volumes that are associated with each other for
data management purposes (e.g., replication, migration). A pair is
usually composed of a primary or source volume and a secondary or
target volume as defined by the user.
pair splitting
The operation that splits a pair. When a pair is "Paired", all data written
to the primary volume is also copied to the secondary volume. When
the pair is "Split", the primary volume continues being updated, but
data in the secondary volume remains as it was at the time of the split,
until the pair is re-synchronized.
pair status
Internal status assigned to a volume pair before or after pair
operations. Pair status transitions occur when pair operations are
performed or as a result of failures. Pair statuses are used to monitor
copy operations and detect system failures.