R/Evolution 2000 Series Troubleshooting Manual page 42

Field
Non Media Errors
Bad Block Reassignments
Bad Block List Size
Capturing Error Trend Data
To capture error trend data for one or more drives:
1. Perform the procedure in "Reviewing Disk Drive Error Statistics" on page 41.
2. Create a baseline by clearing the current error statistics.
To clear the statistics for one drive, select the drive and click Clear Selected Disk
Drive Error Statistics. To clear the statistics for all drives, click Clear All Disk
Drive Error Statistics. You cannot clear the Bad Block List Size statistic.
If a faulty drive is present, errors are captured in a short period of time. If the drive
has intermittent errors you might have to monitor the storage system for more than
24 hours.
3. To view the error statistics, select the suspected drive and click Show Disk Drive
Error Statistics.
4. Review the Disk Drive Error Statistics panel for drive errors.
The Disk Drive Error Statistics panel enables you to review errors from each of the
two ports.
42 R/Evolution 2000 Series Troubleshooting Guide • May 2008
Description
The number of soft, recoverable errors that are not
associated with drive media.
The number of block reassignments that have taken place
since the drive was shipped from the vendor. A large
number of reallocations in a short period of time could
indicate a serious condition.
The number of blocks that have been deemed defective
either from the vendor or over time due to reallocation.