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12-5
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 12 Troubleshooting SAN Device Virtualization
SDV Issues
Host Cannot Locate Disk
Table 12-4 describes measures to take when a host cannot locate a disk.
Symptom SDV cannot locate disk.
Table 12-4 SDV Cannot Locate Disk
Symptom Possible Cause Solution
Host cannot locate disk. Host and virtual device are not zoned
correctly; not all zone members are
resolved.
Enter the show sdv zones active vsan command to
identify whether or not zoning is configured and resolving
correctly. If it is not, make the necessary corrections to the
zone and reactivate zoning.
Host or virtual device not connected to
an SDV-enabled switch.
Enable SDV on those switches.
Rewrite entries are not programmed
correctly.
To confirm that the ACL rewrite and capture entries are
programmed correctly for the host and virtual device,
enter the show sdv internal acl-cache dump vsan
command on switches where the host and virtual devices
are connected.
If the host or virtual device is connected to the Cisco MDS
9124 Fabric Switch, check the director at the next hop to
confirm that the rewrite and capture entries are
programmed correctly on all the trunk ports to the switch.
Enter the show tech-support sdv command and collect
the data returned.
There are no rewrite-capable switches
in either the host-to-virtual device or
virtual device-to-host direction.
Make sure that the topology mirrors the supported
topologies for SDV to work. Between the host, the SDV,
and the real device, there must be at least one of the
following switches in the path:
• 95xx
• 9216
• 9216A
• 9216i
• 9120
• 9140
SDV must also be enabled.
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