Hitachi AMS2100 User Manual page 197

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.
P
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.
paired volume
Two volumes that are paired in a disk array.
parity
The technique of checking whether data has been lost or corrupted
when it's transferred from one place to another, such as between
storage units or between computers. It is an error detection scheme
that uses an extra checking bit, called the parity bit, to allow the
receiver to verify that the data is error free. Parity data in a RAID array
is data stored on member disks that can be used for regenerating any
user data that becomes inaccessible.
parity groups
RAID groups can contain single or multiple parity groups where the
parity group acts as a partition of that container.
peer-to-peer remote copy (PPRC)
A hardware-based solution for mirroring logical volumes from a primary
site (the application site) onto the volumes of a secondary site (the
recovery site).
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