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HP Server Manageability Extensions Provider for Storage

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Array Accelerator Information

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Array Accelerator Information
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Select the smart array controller item from the Storage controller list to display the accelerator information:

  • Status displays the status of the array accelerator. The following values are valid:

    • Unknown- The Storage provider cannot determine the status of the Array Accelerator. You may need to upgrade the Storage provider.

    • OK- Cache operations are currently configured and enabled for at least one logical drive.

    • Temporarily Disabled- Cache operations have been temporarily disabled. Check the Array Accelerator Error Code for the monitored item to determine why the cache operations have been temporarily disabled.

    • Permanently Disabled- Cache operations have been permanently disabled. Check the Array Accelerator Error Code for the monitored item to determine why the cache operations have been disabled.

    • Not Configured- An Array Accelerator has not been configured.

    • Stressed indicates that the element is functioning, but needs attention. Examples of "Stressed" states are overload, overheated, and so on.

    • Predictive Failure indicates that an element is functioning nominally but predicting a failure in the near future.

    • In Service describes an element being configured, maintained, cleaned, or otherwise administered.

    • No Contact indicates that the monitoring system has knowledge of this element, but has never been able to establish communications with it.

    • Lost Communication indicates that the Managed System Element is known to exist and has been contacted successfully in the past, but is currently unreachable.

    • Stopped and Aborted are similar, although the former implies a clean and orderly stop, while the latter implies an abrupt stop where the state and configuration of the element might need to be updated.

    • Dormant indicates that the element is inactive or quiescent.

    • Supporting Entity in Error indicates that this element might be "OK" but that another element, on which it is dependent, is in error. An example is a network service or endpoint that cannot function due to lower-layer networking problems.

    • Completed indicates that the element has completed its operation. This value should be combined with either OK, Error, or Degraded so that a client can tell if the complete operation Completed with OK (passed), Completed with Error (failed), or Completed with Degraded (the operation finished, but it did not complete OK or did not report an error).

    • Power Mode indicates that the element has additional power model information contained in the Associated PowerManagementService association.

  • Error Code displays the status of the cache operations. The following values are valid:

    • None- Cache operations are currently configured and enabled for at least one logical drive. No cache errors have occurred.

    • Redundant Controller Cache Size Mismatch- Cache operations are temporarily disabled. The cache sizes on the redundant controllers do not match.

    • Cache Disabled Expand In Progress- Cache operations are temporarily disabled due to an expand of a logical drive. When the expand operation completes, the accelerator will be enabled.

    • Cache Disabled Low Batteries- Cache operations are temporarily disabled. The redundant controller has insufficient cache battery power.

    • Cache Disabled Low Resources- Cache operations are temporarily disabled. The controller does not have sufficient resources to perform cache operations. For example, when a replaced drive is being rebuilt, there will not be sufficient resources. Once the operation that requires the resources has completed, this condition will clear and cache operations will resume.

    • Error Reading Cache Board- Cache operations have been permanently disabled. The Array Accelerator stores mirrored copies of all data. While reading the data, memory parity errors occurred so both copies were corrupted and cannot be retrieved. Data has been lost. Have the board serviced.

    • Requires Reboot To Enable Cache- Cache operations have been permanently disabled. Reboot requires to Enable Cache.

    • Cache Disabled Snapshot In Progress- Cache operations are temporarily disabled due to a snapshot operation that is queued up or in progress. When the snapshot operation completes, the accelerator will be enabled.

    • Error Writing Cache Board- Cache operations have been permanently disabled. This error occurs when an unsuccessful attempt was made to write data to the Array Accelerator. Data could not be written to write cache memory in duplicate due to the detection of parity errors. This error does not indicate data loss. Have the board serviced.

    • Possible Data Loss From Low Battery- The array controller has one or more array accelerator batteries that are recharging. Array accelerator operations such as Battery Backed Write Cache, Expansion, Extension and Migration are temporarily suspended until the batteries are fully charged. Array accelerator operations will automatically resume when charging is complete.

    • Cache Disabled Run ADU- Cache operations are temporarily disabled. Run ADU to enable Cache.

    • Wrong Cache Board Attached- Cache operations have been permanently disabled. The attached cache board is wrong.

    • Error Detected Run ADU- Cache operations are temporarily disabled due to an error. Run ADU to enable Cache.

    • Valid Data In Cache Board Found- The data found in the cache board is valid.

  • Serial Number displays the serial number for the Array Accelerator. Use this number for identification purposes.

  • Total Memory displays the total amount of accelerator memory in megabytes, including both battery-backed and non-battery-backed memory.

  • Write Cache displays the percentage of cache memory allocated for posted write caching or the amount of memory allocated for the write cache in Kbytes. If Kbytes are displayed then the actual amount of usable memory is half the amount shown because the data is kept in duplicate (mirrored).

  • Read Cache displays the percentage of cache memory allocated for read ahead caching or the amount of memory allocated for the read cache in Kbytes. If Kbytes are displayed then the actual amount of usable memory is half the amount shown because the data is kept in duplicate (mirrored).

  • Battery Status indicates the current status of the Battery. The enumeration's values are

    • Unknown

    • OK

    • Failed

    • Not Fully Charged

  • Write Errors displays the total number of write memory parity errors that were detected while writing to the Array Accelerator.

    Write parity errors occur when the system detects that information has not been transferred to the Array Accelerator correctly. A parity bit is included for each byte of information stored in memory. When the microprocessor reads or writes data, the system counts the value of the bits in each byte. If the total does not match the system's expectations, a parity error has occurred.

  • Read Errors displays the total number of read memory parity errors that were detected while reading from the Array Accelerator. The mirrored copy of data in the write cache can be accessed to obtain correct data if a memory parity error occurs.

    Memory parity errors occur when the system detects that information has not been transferred correctly. A parity bit is included for each byte of information stored in memory. When the microprocessor reads or writes data, the system counts the value of the bits in each byte. If the total does not match the system's expectations, a parity error has occurred. A bad memory chip, memory corruption, or lack of memory refresh may cause memory parity errors.