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Basic troubleshooting steps

223

Troubleshooting

3. If all items in step 2 appear as expected, verify that PowerPath

can access all devices and device paths. This can be done in the

PowerPath GUI or powermt commands. Refer to “Starting

PowerPath GUI for Windows” on page 167 for more information.

• In the PowerPath GUI or powermt, verify that each expected

adapter is listed with the expected targets, LUNs, and number

of paths per LUN. If paths/LUNs are missing, verify adapter

zoning and access permissions, and ensure that correct

PowerPath licenses have been installed.

• If PowerPath is not able to detect all EMC devices listed in the

device manager, it is usually due to the devices being offline or

not able to be claimed by PowerPath.

• Devices may also appear in the Device Manager with an "!"

and not correctly list some PowerPath drivers as loaded. In

these cases it usually means that an incorrect PowerPath

license key was used, an unsigned PowerPath beta product

was used, or there were errors when installing PowerPath.

Note: Refer to PowerPath documentation for supported

configurations and procedures to correct these conditions.

4. If all items in step 3 (or step 2 if no PowerPath is installed) appear

as expected, verify in the Disk Management (previously called

disk manager) that all LUNs are available to be accessed and

used. To do this, start the Disk Management similar to “Starting

disk management for Windows” on page 166 and review as

follows:

• Each array LUN should be represented as a single disk

number entry. There should be no duplicate LUN path entries

here. If there are, either PowerPath is not functioning correctly

or you have not installed PowerPath or multipath software

correctly and are using an unsupported multipath

configuration.

• All LUNS should be listed as Online and list the Windows

usable raw capacity. Disks may be basic or dynamic if

previously used by Windows. Disks that are offline or listed as

no capacity are likely system or inactive BCV LUNs, and may

appear depending on the state of the LUN. If LUNs that are

expected to be usable are offline or do not display the capacity

correctly, ensure the LUN is correctly assigned to the host, has

not been trespassed to an unavailable path (VNX series or

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Emulex 110 Guía de instalación Pagina 223