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3ware Disk Manager (3DM 2)
58 3ware 9000 Series Serial ATA RAID Controller User Guide
Two self-tests can be scheduled:
Upgrade UDMA mode. This test checks the speed at which data transfer to
drives is occurring, to see if the UDMA mode can be increased. (If you are
already running at the fastest UDMA mode, then this self-test has no effect.)
The UDMA mode can become downgraded in the event that cable CRC errors
are encountered, requiring multiple retries to read sectors. In severe cases, the
UDMA mode may be downgraded from ATA 150 to ATA 133, to ATA 100, to
66, to 33.
This check is also done every time the system is booted.
UDMA mode does not apply to SATA.
Check SMART Thresholds. This test checks to see whether SMART
thresholds have been exceeded.
The SMART thresholds indicate when a drive is likely to fail, based on the
number of errors that have been recorded through SMART (Self-Monitoring,
Analysis and Reporting Technology).
If any of the disk drives have detected a “threshold exceeded” condition, then
an AEN is logged to the 3DM Alarms page. Moreover, if anything unusual is
found during any self-test, it will be logged as an Alarm.