HP 3000 Enterprise Virtual Array - Manual (Page 61)

NOTE:
An error always generates a condition report. Not all condition reports are generated by errors.
Error condition categories
Each error condition is assigned to a category based on its impact on disk enclosure operation. The
following four error categories are used:
• Unrecoverable—the most severe error condition, it occurs when one or more enclosure
components have failed and have disabled some enclosure functions. The enclosure may be
incapable of correcting, or bypassing the failure, and requires repairs to correct the error.
NOTE:
To maintain data integrity, corrective action should be implemented immediately for an
UNRECOVERABLE condition.
• Critical—occurs when one or more enclosure components have failed or are operating outside
of their specifications. The failures impact the normal operation of some components in the
enclosure. Other components within the enclosure may be able to continue normal operations.
Prompt corrective action should be taken to prevent system degradation.
• Noncritical—occurs when one or more components inside the enclosure have failed or are
operating outside of their specifications. The failure of these components does not impact
continued normal operation of the enclosure. All components in the enclosure continue to
operate according to their specifications. The ability of the components to operate correctly
may be reduced should other errors occur. Prompt corrective action should be taken to prevent
system degradation.
• Information—the least severe condition indicates a condition exists that does not reduce the
capability of a component. However, the condition can become an error and require corrective
action. An INFORMATION condition provides an early warning, which enables you to prepare
to implement corrective action before a component fails. Correction of the reported problem
may be delayed.
The error conditions are prioritized by severity—from most severe to least. The most severe condition
takes precedence and is reported first when multiple errors are detected. The reporting characteristics
for each error condition are listed in Table 18 .
Table 18 Error condition reporting characteristics
Error condition Takes precedence over Audible alarm pattern 1
UNRECOVERABLE All other conditions On continuously
CRITICAL NONCRITICAL and
INFORMATION
Sounds three times per alarm cycle
NONCRITICAL INFORMATION Sounds two times per alarm cycle
INFORMATION No other conditions Sounds once per alarm cycle
1 The pattern occurs when the condition is the most severe active condition
Error queue
The EMU maintains an internal error queue for storing error conditions. Each error condition remains in
the error queue until the problem is corrected, or for at least 15 seconds after the error is reported. This
ensures that when there are multiple errors or a recurring error, each can be displayed. Each entry in the
error queue can be displayed using a combination of the top and bottom buttons. Each error entry in the
queue contains the element type, the element number, and the error code.
Enterprise Virtual Array 3000/5000 user guide 61