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C-Track
The HP StorageWorks Continuous Track XP software program, which
detects internal hardware component problems on a disk array and
automatically reports them to the HP STC.
CA
The HP StorageWorks Continuous Access XP program, which enables you
to replicate data stored on a local disk array to a remote disk array.
cache
Very high speed memory that is used to speed I/O transaction time. All
reads and writes to the XP array family are sent to the cache. The data is
buffered there until the transfer to/from physical disks (with slower data
throughput) is complete.
The benefit of cache memory is that it speeds I/O throughput to the
application. The larger the cache size, the greater the amount of data
buffering that can occur and the greater throughput to the applications.
XP arrays support a range of cache memory. In the event of power loss,
battery power holds up the contents of cache for up to 36 hours.
CE
Customer engineer.
channel adapter
The channel adapter (CHA) provides the interface between the disk array
(CHA)
and the external host system. Occasionally this term is used synonymously
with the term channel host interface processor (CHIP).
channel host
Synonymous with the term channel adapter (CHA).
interface processor
(CHIP)
channel processor
The processors located on the channel adapter (CHA). Synonymous with
(CHP)
CHIP.
command device
A volume on the disk array that accepts Continuous Access or Business
Copy control operations which are then executed by the disk array.
control unit
To organize the storage space attached to the DKC, you can group similarly
configured logical devices (LDEVs) with unique control unit images
(CUs). CUs are numbered sequentially. The disk array supports a certain
number of CUs, depending on the disk array model. Each CU can manage
multiple LDEVs. Therefore, to uniquely identify a particular LDEV
requires both the CU number and the LDEV number.
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HP StorageWorks Disk Array XP1024: Site Preparation Guide
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