A missing logical drive is a placeholder node displayed in the Logical View, indicating that the storage subsystem has detected drives associated with a logical drive that are no longer accessible. Typically, this is the result of removing drives associated with an array, or when a loss of power to one or more drive enclosures has occurred.
Missing logical drives will only be displayed in the Logical View if associations exist, such as a logical drive-to-LUN mapping or associated FlashCopy and repository logical drives.
Caution: Missing logical drives, in most cases, are recoverable. Do not delete missing logical drives without confirming that the logical drives are no longer required, as they will be permanently removed from the configuration. For more information, see Recovering Missing Logical Drives.
If missing logical drives are detected by the storage subsystem, a Missing Logical Drives group is created in the Logical View of the Subsystem Management Window. Each missing logical drive
is shown, identified by its world wide name and logical drive type. Missing logical drives are identified as being either a standard logical drive
The Defined Mappings pane of the Mappings View updates a logical drive's properties when it is detected as being a missing logical drive.
The following are examples of typical display changes that occur in the Subsystem Management Window when missing logical drives are detected by the storage subsystem.
Example 1: A standard logical drive has no associated higher-level logical drives and no logical drive-to-LUN mapping defined. Display Details:
Menu Options Available: None |
Example 2: A standard logical drive has no higher-level logical drives but has a logical drive-to-LUN mapping defined. The standard logical drive is displayed as missing. Display Details:
Menu Options Available: Delete (pull-down and right-mouse pop-up menu) |
Example 3: A base logical drive with an associated higher-level logical drive (FlashCopy), has defined logical drive-to-LUN mappings. The repository logical drive exists on the same array. The base logical drive and repository logical drive are displayed as missing. Display Details:
Menu Options Available:
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Example 4: A base logical drive with an associated higher-level logical drive (FlashCopy) has defined logical drive-to-LUN mappings. The repository logical drive exists on a different array. Only the base logical drive is displayed as missing. Display Details:
Menu Options Available:
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Example 5: A base logical drive with an associated higher-level logical drive (FlashCopy) has defined logical drive-to-LUN mappings. The repository logical drive exists on a different array. Only the repository logical drive is displayed as missing. Display Details:
Menu Options Available:
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If missing logical drives are detected because drives have accidentally been removed, or are detected as missing due to a loss of power to the drive enclosures, recovery of these logical drives is possible by:
For detailed recovery instructions, see the Recovery Guru Procedures, or contact technical support.
If the missing logical drives are no longer required, they can be deleted permanently from the configuration. For more information, see Deleting a Missing Logical Drive.