Owner's manual

NOTE:
An error alwa ys 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—themostsevereerrorcondition,itoccurswhenoneormoreenclosure
components have failed and have disabled some enclosure functions. The enclosure m ay be
incapable of correcting, or bypassing the failure, and requires repairs to correct the error.
NOTE:
T o maintain data integrity , corrective action should be implemented immediately for an
UNRECOV E RABLE 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 m ay 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 c omp onents 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 a n early warning, which enables you to prepare
to implem ent corrective action b efore a component fails. Correction of the reported problem
may be delayed.
Theerrorconditionsareprioritizedbyseverity—frommostseveretoleast.Themostseverecondition
takes precedence and is reported first when multiple errors are detected. The reporting characteristics
foreacherrorconditionarelistedinTable 17.
Table 17 Error condition reporting characteristics
Error condition Takes precedence over Audible alarm pattern
1
UNRECOVERABLE
All othe
r conditions
On conti
nuously
CRITICAL
NONCRITICAL and
INFORMATION
Sounds three times per alarm cycle
NONCRITICAL INFORMATION
Sounds two times per alarm cycle
INFORM
ATION
No other conditions Sounds once p er alarm cycle
1
The pat tern occurs when the condition is the most severe active condition
Error queue
The EMU maintains an internal error queue for storing error cond itions. Each error condition remains in
the error queue until the problem is co rrected, or for a t least 15 seconds after the error is reported. This
ensur
es that when there are multiple errors or a recurring error, each c an be displayed. Each entr y in the
error
queue c an be displayed using a combination of the top and bottom but tons. Each error entry in the
queue contains the element type, the element number, and the error code.
4000/6000/8000 Enterprise Virtual Array user guide
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