HP 6100 HP 4x00/6x00/8x00 Enterprise Virtual Array User Guide (5697-0733, Marc - Page 175

Network Storage Controller. The HSV Controllers used by the Enterprise storage system.

Page 175 highlights

M management agent management agent event mean time between failures metadata micro meter mirrored caching mirroring MTBF multi-mode fiber The HP Command View EVA software that controls and monitors the Enterprise storage system. The software can exist on more than one management server in a fabric. Each installation is a management agent. Significant occurrence to or within the management agent software, or an initialized storage cell controlled or monitored by the management agent. See MTBF. Information that a controller pair writes on the disk array. This information is used to control and monitor the array and is not readable by the host. See µm. A process in which half of each controller's write cache mirrors the companion controller's write cache. The total memory available for cached write data is reduced by half, but the level of protection is greater. The act of creating an exact copy or image of data. Mean Time Between Failures. The average time from start of use to first failure in a large population of identical systems, components, or devices. 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 mode enables bidirectional transmissions. N Network Storage Controller node port non-OFC (Open Fibre Control) NONCRITICAL Condition NSC NVRAM 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 Enterprise storage system transceivers are non-OFC compatible. 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 according to their specifications. The ability of the devices to operate correctly may be reduced if additional failures occur. UNRECOVERABLE and CRITICAL errors have precedence over this condition. This condition has precedence over INFORMATION condition. Early correction can prevent the loss of data. Network Storage Controller. The HSV Controllers used by the 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. O occupancy alarm level OCP online/nearonline operator control panel 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 push-button. An online drive is a normal, high-performance drive, while a near-online drive is a lower-performance drive. See OCP. 175

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M
management
agent
The HP Command View EVA software that controls and monitors the Enterprise storage system.
The software can exist on more than one management server in a fabric. Each installation is a
management agent.
management
agent event
Significant occurrence to or within the management agent software, or an initialized storage cell
controlled or monitored by the management agent.
mean time
between failures
See
MTBF.
metadata
Information that a controller pair writes on the disk array. This information is used to control and
monitor the array and is not readable by the host.
micro meter
See
µm.
mirrored caching
A process in which half of each controller’s write cache mirrors the companion controller’s write
cache. The total memory available for cached write data is reduced by half, but the level of
protection is greater.
mirroring
The act of creating an exact copy or image of data.
MTBF
Mean Time Between Failures. The average time from start of use to first failure in a large population
of identical systems, components, or devices.
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 mode enables
bidirectional transmissions.
N
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 Enterprise storage system transceivers are non-OFC compatible.
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 according to
their specifications. The ability of the devices to operate correctly may be reduced if additional
failures occur. UNRECOVERABLE and CRITICAL errors have precedence over this condition. This
condition has precedence over INFORMATION condition.
Early correction can prevent the loss
of data.
NSC
Network Storage Controller. The HSV Controllers used by the 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 push-button.
online/nearonline
An online drive is a normal, high-performance drive, while a near-online drive is a
lower-performance drive.
operator control
panel
See
OCP.
175