Chapter 7. Advanced maintenance, troubleshooting, and diagnostics 423
Managing a replaced HBA from Storage Manager
If an HBA is replaced in a host, then changes might need to be made in the switch zoning and
Storage Manager host definition mappings. First, select the Mappings tab in the Storage
Manager Subsystem Management window. Highlight the host with the new HBA in the
left-hand pane and then select Mappings Manager Host Port Identifiers. The Host Port
Identifiers window opens, as shown in Figure 7-64.
Figure 7-64 Host Port Identifiers window
By clicking the Replace button, we are given the option to select a new WWPN for this device
from a drop-down list of accessible undefined devices.
Any logical drives might remain on the non-preferred controller while all available paths to the
preferred controller are inaccessible.
Checking host configuration
If logical drives remain on the non-preferred path even though all paths have been confirmed
to be accessible, then the focus must switch to the host itself. Here, we need to check that:
Supported versions of the HBA driver, HBA BIOS, and multipath drivers are installed
HBA parameters are set correctly
Operating system parameters (that is, the Windows registry) are set correctly
All operating system specific rules, limitations, and prerequisites are met
For hosts running SDDPCM/MPIO, the following commands are available for further
troubleshooting:
pcmpath query adapter
pcmpath query adaptstats
pcmpath query device
pcmpath query devstats
pcmpath query essmap
pcmpath query portmap
pcmpath query wwpn