HP 3PAR StoreServ 7400 2-node HP 3PAR Command Line Interface Administrator& - Page 120
Viewing the Event Log, Stopped Logical Disks and Missing Physical Disks, Preserved Data
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Viewing the Event Log To view the events log, issue the showeventlog command. The eventlog display can be refined to include only events occurring before or after a specified time, within a specified time period, or that match a specified pattern. For complete information on the events log display options, see the HP 3PAR Command Line Interface Reference. Removing the Event Log To remove all event logs with severity Debug from the system, issue the removeeventlog command. The removeeventlog command removes all event logs with severity Debug from the system. Stopped Logical Disks and Missing Physical Disks If physical disks in the system are unavailable when the system is powered on, the physical disk is in the Missing state. The system manager will not immediately start LDs that have chunklets on these missing disks. The result is some LDs remain in the Stopped state. Use the showpd and showld commands to display the state of physical and LDs. If the LD is data-complete, but a few of the physical disks are missing, the LDs will be automatically started after waiting five minutes. If more than four physical disks are missing, the LDs will not be started automatically. You can start a data-complete LD using the InForm OS CLI startld command, and the system manager will begin reconstructing the missing mirrored data. The system automatically relocates the chunklets from the missing physical disks to free space or spare space. For a complete list of options available for the showpd and showld commands, see the HP 3PAR Command Line Interface Reference and the HP 3PAR CLI Help. Preserved Data When the system is holding data in cache but is not able to write that data to the destination disk for any reason, it saves the data to the preserved data LD. This LD is automatically created at the time that the storage system is installed and initially configured. The data written to the preserved data LDs is typically created due to a temporary loss of availability of disks, a situation that usually corrects itself once the disks become available again. When the destination LDs become available again, the system automatically plays back the preserved data by writing it from the preserved data LDs to the destination LDs. If you notice that the preserved data LD has data saved for a long time, use the showpd command to see which physical disks are in an unavailable state. If any disks are in an unavailable state, it is necessary to take corrective action in order to make those disks available again. If data is persistently saved to the preserved data LD, contact your local service provider for technical support and services. 120 Managing Events and Alerts