Cisco MDS-9124 Troubleshooting Guide - Page 259

Chapter 12 Troubleshooting SAN Device Virtualization SDV Issues Send documentation comments to [email protected] 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 Enable SDV on those switches. an SDV-enabled switch. 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. OL-9285-05 Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x 12-5