Verify that the disks are detected by the Operating System (OS).

This can be done from Windows Device Manager or by running Diskpart from a Windows command prompt.

Verify that the disks are detected by the HBA Management Software. Examples of HBA management software include:
- Emulex HBAnywhere
- QLogic Sansurfer
- IBM Navisphere 

If the disks are not detected by either Windows or the HBA Management software, review the following:
If either the HBA management software or Windows are unable to detect the disks, the issue lies outside the scope of Storage Foundation for Windows (SFW)/InfoScale.

Both the HBA drivers and the Windows disk drivers reside below the SFW/InfoScale stack. If the disks are not detected by either the Windows disk drivers or the HBA drivers, SFW/InfoScale will not detect the disks either.

Note: In some cases, the HBA management software may detect the disks even though neither Windows, nor SFW/InfoScale can detect the disks.

This is possible because the HBA drivers reside at a lower layer than either the Windows disk driver or SFW/InfoScale. In this case, the HBA settings, firmware and drivers should be examined to determine why the disks are not being presented to the Windows disk drivers.

Recommendations:

1. Consider any recent hardware or software changes that have been made
2. Zoning changes: Verify that the HBAs (host bus adapters) for the affected server(s) have been included in the same zone as the disks.
3. HBAs: Use the HBA management software to verify that the HBA settings are correct. Compare the settings for an affected server with a server  that is not exhibiting problems (if present).
4. Storage area network (SAN) hardware changes, such as HBAs, switches or disk arrays
5. Changes to Multipathing settings
6. Verify that the latest maintenance packs or roll-up patches have been installed for SFW/InfoScale