What are three ways to be informed of an Exadata Storage Server disk failure?
A.
review of the output of list alerthistory
B.
review of the output of select status from vSdatafile
C.
review of the ILOM log
D.
alert notifications through email when SMTP notification is configured
E.
alert notifications in the Enterprise Manager Exadata Plug-In
F.
review of database server iostat output
Explanation:
A: A disk status change would be associated with an entry in the storage cell
alerthistory.
D: The Cell Alert Delivery Configuration Worksheet allows you to provide SMTP detailsto allow for
e-mail communication of various cell alerts and failures.
Incorrect:
Not F: Use the iostat command to report statistics about disk input and output, and to produce
measures of throughput, utilization, queue lengths, transaction rates, and service time.
A D E
http://www.oracle.com/technetwork/articles/servers-storage-admin/monitor-exadata-em12-2291964.html
I think A,C,D
The first step requires that you identify the problem disk. This could occur in several ways:
• Hardware monitoring using ILOM may report a problem disk.
• If a disk fails, an Exadata alert is generated. The alert includes specific instructions for replacing the disk. If you have configured the system for alert notifications, the alert will be sent to the designated email address or SNMP target. The LIST ALERTHISTORY command could also be used to identify a failed disk.
• The LIST PHYSICALDISK command may identify a disk reporting an abnormal status.
Even if the cell is still functioning, the problem may be a precursor to a disk failure.
• The CALIBRATE command may identify a disk delivering abnormally low throughput or
I/Os per second (IOPS). Even if the cell is still functioning, a single bad physical disk can degrade the performance of other good disks; so, you may decide to replace the
identified disk. Note that running CALIBRATE at the same time as the cell is active will impact performance.