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282 Troubleshooting: Your Storage Array Software
NOTE: In Windows, the mount point path is a drive letter.
An error message appears in the command line when the utility cannot
distinguish between the following:
• Source virtual disk and snapshot virtual disk (for example, if the snapshot
virtual disk has been removed).
• Standard virtual disk and virtual disk copy (for example, if the virtual disk
copy has been removed).
Unidentified Devices
An unidentified node or device occurs when MDSM cannot access a new
storage array. Causes for this error include network connection problems, the
storage array is turned off, or the storage array does not exist.
NOTE: Before beginning any recovery procedure, ensure that the host context
agent software is installed and running. If you host is started before it is connected
to the storage array, the host context agent software will not be able to find the
storage array. If so, ensure that the connections are tight, and restart the host
context agent software.
• If a storage array is managed by using both out-of-band management and
in-band management using the same host, a management network
connection problem might prevent direct communication with the storage
array. However, you might still be able to manage the storage array over the
in-band connections. The opposite situation can also occur.
• If a storage array is managed through more than one host, it is possible
that the storage array might become unresponsive to communication over
the connections given by one host. However, you might still be able to
manage the storage array over the connections provided by another host.
Recovering From an Unidentified Storage Array
1
Ensure that the network connection to the storage management station
is operating.
2
Ensure that the controllers are installed and that the power is turned on to
the storage array. Correct any existing problems before continuing.
3
If you have an in-band storage array, use the following procedure. Click
Refresh after each step to check the results:
book.book Page 282 Wednesday, June 8, 2011 5:01 PM