Database Reference
In-Depth Information
Disk Failures
As part of hardware operations, it is very common for various components to fail. Due to the nature and operational
factors of disks, failure should always be seen as imminent, and that is why ODA provides double or triple software
mirroring. Such mirroring allows for failures to occur without data loss.
Diagnosis of a failed disk is very important, and providing the right level of information helps in the expedited
replacement of a disk. Listing 7-31 displays how to execute
odasundiag.sh
, which is a diagnostics command built
specifically for the ODA so that an Oracle engineer can get pertinent diagnostic information about the disk failure and
create a Field Service Task to either send a replacement disk or have a service engineer replace it.
Listing 7-31.
ODA Sun Diagnostics Script
# /root/Extras/odasundiag.sh
The file generated when the command in Listing 7-31 is executed will need to be uploaded to My Oracle Support
as part of a service request. This will allow for the support personnel to determine the problem and provide a
resolution. If the resolution is disk replacement, it can be handled by the customer or by Oracle's field services team.
ASR, if set up, will also open a service request to Oracle and provide base data so that a Field Service Request is
opened to replace a disk.
If you need to replace a drive, you can ease the job of finding the offending drive by turning on the locator
beacon. Listing 7-32 displays the command to locate a disk.
Listing 7-32.
Locate a Disk
# ./oakcli locate disk e0_pd_00 on
Disk: e0_pd_00 and to: ON
Executing this command causes an LED to be turned on, which is used to ensure that the correct disk is being
removed and replaced. This is useful for hardware engineers and ensures that only the right part is replaced.
Summary
This chapter focused on various proactive and reactive measures to keep an ODA healthy and to diagnose various
issues. The ODA is meant to be a fully self-sufficient solution, and as such, provides tools such as built-in validation,
ODA configuration audit toolcheck., and Trace File Analyzer to provide fully proactive diagnostics. Problems can still
happen, however, and tools such as ODA diagnostic collection utility help in the transmission and collection of data
for quicker problem resolution. ASR is an optional utility that provides automatic failure detection and SR creation for
Oracle x86 systems, including the ODA.
