Instruction Manual

multi-mode fiber A fiber optic cable with a diameter large enough (50 microns or more) to allow
multiple streams of light to travel different paths from the transmitter to the
receiver. This transmission m ode enables bidirectional transmissions.
Network Storage
Controller
See NSC.
NONCRITICAL
Condition
A drive enclosure EMU condition report that occurs when one or more elements
inside the enclosure have failed or are operating outside of their specifications.
The failure does not affect continued normal operation of the enclosure. All
devices in the enclosure continue to operate a ccording to their specifications.
The ability of the devices to operate correctly may be reduced if additional
failures occur. UN RECOVERABLE and CRITICAL errors have precedence over
this condition. This cond ition has precedence over INFORMATION condition.
Early correction can prevent the loss of data.
node por t A device port that can operate on the arbitrated loop topology.
non-OFC (Open
Fibre C ontrol)
A laser transceiver whose lower-intensity output does not require special open
Fibre Channel mechanisms for eye protection. The Enterprise storage system
transceivers are non-OFC compatible.
NSC Network Storage Controller. The HSV Controllers used by the Enterprise storage
system.
NVRAM Nonvolatile Random Access Memory. Memory whose c ontents are not lost when
asystemisturnedOfforifthereisapowerfailure. Thisisachievedthrough
the use of UPS batteries or implementation technology such as flash m emory.
NVRAM is commonly used to store important configuration parameters.
occupancy alarm
level
A percentage of the total disk group capacity in blocks. When the number of
blocks in the disk group that contain user data reaches this level, an event code
is generated. The alarm level is specified by the user.
OCP Operator Control Panel. The element that displays the controller’s status using
indicators and an LCD. Information selection and da ta entry is controlled by
the OCP push-buttons.
online/nearonline An online drive is a normal, high-perfomance drive, while a near-online drive
is a lower-performance drive.
operator control
panel
See OCP.
OpenView Stor-
age Manag em ent
Ser ver
A centralized, appliance-based monitoring and management interface that
supports multiple applications, operating systems, hardware platforms, storage
systems, tape libraries and SAN-related interconnect devices. It is included and
resides on the SANWorks Management Server, a single aggregation point
for data management.
param That por tion of the HSV controller termination code display that defines:
• The 2-character parameter identifi er that is a decimal number in the 0
through 30 range.
• The 8-character parameter code that is a hexadecimal number.
See also IDX and TC.
password A security interlock where the purpose is to allow:
• A management agent to control only certain storage systems
• On ly certain management agents to control a storage system
PDM Power Distribution Module. A thermal circuit breaker-equipped power strip that
distributes power from a PDU to Enterprise Storage System elements.
Enterprise Virtual Array 3000/5000 user guide (VCS 3.110)
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