FW V06.XX/HAFM SW V08.02.00 HP StorageWorks Directors and Edge Switches Glossary (AA-RU5JB-TE, July 2004)

Glossary
10 Directors and Edge Switches Glossary
connector
See optical fiber connector.
control processor card
(CTP card) — Circuit card that contains the director microprocessor. The CTP card also
initializes hardware components of the system after power-on. A 10 Mbps RJ-45 twisted pair
connector is located on the CTP card to connect to an Ethernet LAN and communicate with the
HAFM server or a specific management station.
control unit
A device that controls the reading, writing, or displaying of data at one or more input/output
units.
control unit port
An internal director port on the CTP card that communicates with the attached IBM S/390 or
similar processor channels to report error conditions and link initialization.
CRC
See cyclic redundancy check.
CTP card
See control processor card.
CUP
See control unit port.
cyclic redundancy check
(CRC) — System of error checking performed at both the sending and receiving station using
the value of a particular character generated by a cyclic algorithm. When the values generated at
each station are identical, data integrity is confirmed.
DASD
Direct access storage device, such as a disk drive.
datagram
See Class 3 Fibre Channel service.
data directory
Directory that contains critical information for all managed products (including directors and
switches). Information stored here includes:
■ All configuration data
■ All log files
■ Call-home settings
■ Firmware library
■ Zoning library