HP 6400/8400 HP StorageWorks 6400/8400 Enterprise Virtual Array User Guide - Page 139

Network storage controller. The HSV controllers used by the HP Enterprise Storage System.

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N near-online storage Network Storage Controller node port non-OFC (Open Fibre Control) NONCRITICAL Condition NSC NVRAM O occupancy alarm level OCP online storage operator control panel P param password PDM PDU petabyte physical disk On-site storage of data on media that takes slightly longer to access than online storage kept on high-speed disk drives. See NSC. A device port that can operate on the arbitrated loop topology. A laser transceiver whose lower-intensity output does not require special open fibre channel mechanisms for eye protection. The HP Enterprise Storage System transceivers are non-OFC compatible. An EMU condition that occurs when one or more elements in the drive enclosure fail or are operating outside specifications. The failure does not affect operation of the enclosure; all devices in the enclosure continue to operate according to specifications. If there are additional failures, however, the devices may not operate properly. UNRECOVERABLE and CRITICAL errors take precedence over this condition. This condition takes precedence over the INFORMATION condition. Early correction can prevent the loss of data. Network storage controller. The HSV controllers used by the HP Enterprise Storage System. Nonvolatile Random Access Memory. Memory whose contents are not lost when a system is turned Off or if there is a power failure. This is achieved through the use of UPS batteries or implementation technology such as flash memory. NVRAM is commonly used to store important configuration parameters. 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. Operator Control Panel. The element that displays the controller's status using indicators and an LCD. Information selection and data entry is controlled by the OCP pushbutton. An allotment of storage space that is available for immediate use, such as a peripheral device that is turned on and connected to a server. See OCP. That portion of the HP HSV controller termination code display that defines: • The two-character parameter identifier that is a decimal number in the 0 through 31 range. • The eight-character parameter code that is a hexadecimal number. A security interlock where the purpose is to allow: • A management agent to control only certain storage systems • Only certain management agents to control a storage system Power distribution module. A thermal circuit breaker-equipped power strip that distributes power from a PDU to HP Enterprise Storage System elements. Power distribution unit. The rack device that distributes conditioned AC or DC power within a rack. A unit of storage capacity that is the equivalent of 250, 1,125,899,906,842,624 bytes or 1,024 terabytes. A disk drive mounted in a drive enclosure that communicates with a controller pair through the device-side fibre channel loops. A physical disk is hardware with embedded software, as opposed to a virtual disk, which is constructed by the controllers. Only the controllers can communicate directly with the physical disks. 139

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N
near-online
storage
On-site storage of data on media that takes slightly longer to access than online storage kept on
high-speed disk drives.
Network Storage
Controller
See
NSC.
node port
A device port that can operate on the arbitrated loop topology.
non-OFC (Open
Fibre Control)
A laser transceiver whose lower-intensity output does not require special open fibre channel
mechanisms for eye protection. The HP Enterprise Storage System transceivers are non-OFC
compatible.
NONCRITICAL
Condition
An EMU condition that occurs when one or more elements in the drive enclosure fail or are
operating outside specifications. The failure does not affect operation of the enclosure; all devices
in the enclosure continue to operate according to specifications. If there are additional failures,
however, the devices may not operate properly. UNRECOVERABLE and CRITICAL errors take
precedence over this condition. This condition takes precedence over the INFORMATION
condition. Early correction can prevent the loss of data.
NSC
Network storage controller. The HSV controllers used by the HP Enterprise Storage System.
NVRAM
Nonvolatile Random Access Memory. Memory whose contents are not lost when a system is
turned Off or if there is a power failure. This is achieved through the use of UPS batteries or
implementation technology such as flash memory. NVRAM is commonly used to store important
configuration parameters.
O
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 data entry is controlled by the OCP pushbutton.
online storage
An allotment of storage space that is available for immediate use, such as a peripheral device
that is turned on and connected to a server.
operator control
panel
See
OCP.
P
param
That portion of the HP HSV controller termination code display that defines:
•
The two-character parameter identifier that is a decimal number in the 0 through 31 range.
•
The eight-character parameter code that is a hexadecimal number.
password
A security interlock where the purpose is to allow:
•
A management agent to control only certain storage systems
•
Only 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 HP Enterprise Storage System elements.
PDU
Power distribution unit. The rack device that distributes conditioned AC or DC power within a
rack.
petabyte
A unit of storage capacity that is the equivalent of 2
50
, 1,125,899,906,842,624 bytes or 1,024
terabytes.
physical disk
A disk drive mounted in a drive enclosure that communicates with a controller pair through the
device-side fibre channel loops. A physical disk is hardware with embedded software, as opposed
to a virtual disk, which is constructed by the controllers. Only the controllers can communicate
directly with the physical disks.
139