Users Guide

Corrective Action: These error messages may be triggered under some noncritical cases. See the system status and the CMC logs to
identify any persistent failures.
NOTE: Event 153 or Event 11 seen in the Windows Event log do not require any corrective action.
Shared PERC 8 cards fail to function
Issue: Shared PERC 8 cards fail to function in systems with the Fault Tolerant Shared PERC 8 card conguration.
Corrective Action: This issue may occur if the Shared PERC 8 card property settings between the two Shared PERC 8 cards is not
compatible. Make sure that the rmware packages are identical for both the Shared PERC 8 cards.
Fatal error or data corruption reported
Issue: Fatal error(s) or data corruption(s) is reported when accessing virtual disks.
Corrective Action: Contact Dell Technical Support.
EMM failure message seen after EMM rmware update
Issue:
CMC shows error message immediately after an enclosure update that the EMM has failed.
Corrective Action: After an EMM update, turn o and restart the VRTX chassis.
Erratic drive LED behavior after EMM Firmware update
Issue:
After updating EMM rmware drive Status, LED blink patterns may lose synchronization.
Description: During an EMM update if the EMM controllers lose synchronization, the Drive Status LED may be updated by both
EMMs out of sequence causing an unidentiable blink pattern.
NOTE: The normal state of the status LED is solid green, which would not be aected. Turn o and
restart the enclosure or chassis to correct this condition. If an external enclosure is turned o and
restarted, the VRTX chassis needs to be shutdown rst.
Corrective Action: Turn o and restart the enclosure or chassis.
Performance variations between write-back and write-through
cache modes
Issue:
Performance is highly variable across congurations, drive type, applications and IO workloads. The write
performance of write-through mode is typically lower than that of write-back mode. Some congurations and
workloads exhibit signicant performance deltas.
Corrective Action: Evaluate your needs for maximum I/O performance (a single Shared PERC 8 conguration) versus maximum data
protection (a Fault Tolerant Shared PERC 8 conguration).
52 Troubleshooting