R/Evolution 2000 Series, Troubleshooting Manual

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Chapter 4 Troubleshooting Using RAIDar 41
Reviewing Disk Drive Error Statistics
The Disk Error Stats page provides specific drive fault information. It shows a
graphical representation of the enclosures and disks installed in the system. The
Disk Error Stats page can be used to gather drive information and to identify
specific drive errors. Additionally, you can capture intermittent errors.
To view the disk drive error statistics:
1. Select Monitor > Statistics > Disk Error Stats.
The top panel displays all enclosures and drives in the storage system.
2. Select the drive whose error statistics you want to view.
3. Click Show Disk Drive Error Statistics.
The drive error data for the selected disk is displayed in the second panel.
4. Note any error counts displayed for these statistics.
Field Description
SMART Event Count The number of SMART (Self-Monitoring, Analysis, and
Reporting Technology) events that the drive recorded.
These events are often used by the vendor to determine
the root cause of a drive failure. Some SMART events
may indicate imminent electromechanical failure.
I/O Timeout Count The number of times the drive accepted an I/O request
but did not complete it in the required amount of time.
Excessive timeouts can indicate potential device failure
(media retries or soft, recoverable errors).
No Response Count The number of times the drive failed to respond to an I/O
request. A high value can indicate that the drive is too
busy to respond to further requests.
Spin-up Retries The number of times the drive failed to start on power-up
or on a software request. Excessive spin-up retries can
indicate that a drive is close to failing.
Media Errors The number of times the drive had to retry an I/O
operation because the media did not successfully
record/retrieve the data correctly.