HP 316095-B21 - StorageWorks Edge Switch 2/24 User Manual page 171

Glossary
connector
See optical fiber connector.
control processor card
Circuit card that contains the switch microprocessor. The CTP card also initializes hardware
components of the system after power-on. Note that the CTP card on this switch is not a FRU.
control unit
A hardware unit that controls the reading, writing, or displaying of data at one or more
input/output units.
control unit port
An internal 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 cyclical redundancy check.
CTP
See control processor card.
CUP
See control unit port.
cyclical redundancy check
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.
data directory
Critical information for all managed products (including Directors and Edge Switches).
Information stored here includes: all HAFM configuration data (product definitions, user
names, passwords, user rights, nicknames, session options, SNMP trap recipients, e-mail
recipients, and Ethernet event notifications); all log files (HAFM logs and individual Product
Manager logs); zoning library (all zone sets and zone definitions); firmware library; call-home
settings (phone numbers and dialing options); configuration data for each managed switch
(stored on the HAFM server and in NV-RAM on each switch).
edge switch 2/24 product manager user guide Glossary–5