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This class creates instances for each logical disk discovered. Logical disks are often a group of physical disks, configured as an array (RAID 0, 1, 5, etc.) and exposed to the operating system as a single physical volume.
●The status of a logical disk typically corresponds to the status of a RAID array (on-line, degraded, rebuilding, etc.). For each logical disk discovered, the Status parameter is displayed. ●The Error Count parameter represents number of errors encountered by the logical disk since the last counter reset. The error count is automatically reset every 24th hour (by default; this setting is configurable). ●The Status parameter represents the overall status of the logical disk. An alert is triggered when the logical disk is not fully operational (degraded, rebuilding, etc.) or not available at all. It triggers an alert if the logical disk missing or if any of the other parameters have breached their thresholds. It is only Status that will trigger and display the alerts. When all is fine, Status shows “OK”, and when there is a problem, it shows “Warning!” or “Alarm!!” with a detailed description of the issue, its consequences and recommended actions. The alert conditions for Status are: “!”=Warning; “!!”=Alarm. Example: “OK” or “Alarm!!” This logical disk is no longer detected."  | For non-RAID disk controllers (as most of IDE controllers, for example), no logical disk will be displayed. |
| The "Status" parameter will report an Alarm if the "Error Count" parameter is greater than zero (that is: the disk encountered some errors). Since the counter is reset every 24th hour, the corresponding alert on the "Status" parameter will be automatically cleared after 24 hours. This mechanism has been implemented to let the system report pure event-driven alerts with no need for manual acknowledgment from the operators. |
Parameters
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Error Count 
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Displays the number of errors encountered by the logical disk since the last counter reset (every 24hrs by default).
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Errors
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n/a
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Locator
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Helps to physically locate a component.
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n/a
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n/a
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Status
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Displays the overall status of the logical disk.
Example: “OK” or “Alarm!! This logical disk is no longer detected”.
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Values:
OK; Warning; Alarm
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Warning = “!”
Alarm = “!!”
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"Status" is a text parameter that describes the overall status of the corresponding device or sensor. Alert conditions describe in symbolic terms what occurs in the "Status" parameter when thresholds are breached: one exclamation mark triggers a warning; two exclamation marks raise an alarm.
Example
If BPM Express for Hardware detects that manufacturer-specified thresholds for the logical disk have been breached, the Status parameter will report “Warning! This logical disk is degraded/is about to fail” or “Alarm!! This logical disk is not detected anymore", or as may be the case. The history graph shows the exact details of the problem, its consequences and recommended actions.
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 Depending on your system, all parameters may not be used.
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