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Product and version information:
The UltraPath was installed on the host. The system had two disk enclosures, and mapped four LUNs to the host.
The expansion cables connecting controller A to the disk enclosures ware removed. The disks in the disk enclosures were in single-link mode. We viewed on the device management on the host that there were four physical disks and four virtual disks.
We ran the sys stopfd command on controller B in MML mode to restart controller B. At this time, a LUN in a disk enclosure failed.
After controller B reset, we saw in the device management on the host that four physical disks were displayed but no virtual disk. The output is shown in Figure1
Figure 1 Device management
1. Delete manually the physical disks on the device manager
as shown in Figure2.
Figure 2 Device management
2. Refresh the device manager again. The system automatically generates physical disks and a corresponding virtual disk
as shown in Figure3.
Figure 3 Device management