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Figure 47 Redundant SAS Connections Displayed in RWC2
Understanding SSD Cache Behavior During a Failover
A SSD Cache VD possesses properties that are similar to a VD with exclusive host access, and it is not
presented to the host operating system. Therefore, the SSD Cache volume does not cache read I/Os for
VDs that are managed by the peer controller node.
Foreign import of a SSD Cache VD is not permitted. To migrate a SSD Cache VD from one controller
node to another, you must delete it from the controller node that currently manages it and then recreate
the SSD Cache VD on the peer controller node.
Error Situations and Solutions
The following table lists problems that you might encounter in a Intel
configuration, along with possible causes and solutions. The highlighted entry is especially important;
when updating the controller firmware, you must be sure that the version of the firmware supports high
availability features.
Problem
A drive is reported as
Unsupported, and the drive
cannot be used in a drive group.
One or more of the following
error messages appear after you
run the Microsoft Cluster
Validation tool:
®
Intel
High Availability Storage User Guide
Possible
The drive is not a SAS drive, or it
does not support SCSI-3 PR.
Two I/O paths are not
established between the
controller and drive.
This build of the Windows
®
RAID High Availability Storage
Cause
Use a SAS drive that supports
SCSI-3 PR. Refer to the list of
compatible SAS drives on the
Intel web site, or ask your drive
vendor.
Confirm that device ports and
all cabling connections between
the controller and drive are
correct and are functioning
properly. See Section -
59
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