Learn About Missing Logical Drives

A missing logical drive is a placeholder node shown in the Logical pane, which indicates that the has detected inaccessible disk drives associated with a logical drive. Typically, this problem is the result of removing disk drives associated with a or when a loss of power to one or more drive expansion enclosures has occurred.


Attention:

Possible loss of data access , in most cases, are recoverable. Do not delete missing logical drives without confirming that the are no longer required, because they will be permanently removed from the configuration.

Conditions

Missing logical drives are shown in the Logical pane only if they are or . In addition, one of these conditions must exist:

Types

If missing logical drives are detected by the storage subsystem, a Missing Logical Drives group is created in the Logical pane. Each missing logical drive is shown, identified by its and logical drive type. Missing logical drives are identified as one of these types:

The Defined Mappings pane of the Mappings tab updates the properties of a logical drive when the logical drive is detected as a missing logical drive.

Recovery

If missing logical drives are detected because disk drives have accidentally been removed or are detected as missing due to a loss of power to the drive expansion enclosures, you can recover these logical drives by performing one of these actions:

For detailed recovery instructions, refer to the Recovery Guru Procedures online help topic, or contact a representative.

If the missing logical drives are no longer required, you can delete them permanently from the configuration. For more information, refer to the Deleting a Missing Logical Drive online help topic.

Examples

These examples show the typical 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 logical drives and no defined mapping.

Display Details Menu Options Available
The logical drive is removed from the Logical pane. None
A missing logical drive does not appear in the Logical pane.
No change appears to the Defined Mappings pane of the Mappings tab.

Example 2

A standard logical drive has no associated logical drives but has a defined mapping. The standard logical drive appears as missing.

Display Details Menu Options Available
In the Logical pane, the Missing Logical Drives group is created with the missing standard logical drive shown in the group. Delete
The Defined Mappings pane in the Mappings tab is updated with this information:
  • The standard logical drive name is replaced with the World Wide Node Name.
  • The standard logical drive capacity is replaced with Unknown.
  • The standard logical drive type is changed to Missing.

Example 3

A base logical drive with an associated flashcopy logical drive has defined mappings. The flashcopy repository logical drive exists on the same array. The base logical drive and flashcopy repository logical drive appear as missing.

Display Details Menu Options Available
In the Logical pane, the Missing Logical Drives group is created, with the missing base logical drive and flashcopy repository logical drive shown in the group.

Delete

View Associated Elements from the right-click menu only

Go to Repository/FlashCopy Logical Drive from the right-click menu only

Properties

The associated flashcopy logical drive appears as a child node of the base logical drive.

The Defined Mappings pane in the Mappings tab is updated with this information:

  • The base logical drive name is replaced with the World Wide Node Name.
  • The base logical drive capacity is replaced with Unknown.
  • The base logical drive type changes to Missing.
  • The flashcopy logical drive type changes to Unavailable.

Example 4

A base logical drive with an associated flashcopy logical drive has defined mappings. The flashcopy repository logical drive exists on a different array. Only the base logical drive appears as missing.

Display Details Menu Options Available
In the Logical pane, the Missing Logical Drives group is created, with the missing base logical drive shown in the group.

Delete

View Associated Elements from the right-click menu only

The associated flashcopy logical drive appears as a child node of the base logical drive.
The Defined Mappings pane in the Mappings tab is updated with this information:
  • The base logical drive name is replaced with the World Wide Node Name.
  • The base logical drive capacity is replaced with Unknown.
  • The base logical drive type changes to Missing.
  • The flashcopy logical drive type changes to Unavailable.

Example 5

A base logical drive with an associated flashcopy logical drive has defined mappings. The flashcopy repository logical drive exists on a different array. Only the flashcopy repository logical drive appears as missing.

Display Details Menu Options Available
In the Logical pane, the Missing Logical Drives group is created with the missing flashcopy repository logical drive shown in the group.

View Associated Elements from the right-click menu only

Go To FlashCopy Logical Drive from the right-click menu only

No change appears in the Defined Mappings pane of the Mappings tab.

Example 6

A standard logical drive is participating in a remote logical drive mirror as a primary logical drive. The primary logical drive appears as missing.

Display Details Menu Options Available
In the Logical pane, the Missing Logical Drives group is created with the missing primary logical drive shown in the group.

Delete

View Associated Elements for the remote secondary logical drive only

Properties for the remote secondary logical drive only

The associated secondary logical drive appears as a child node of the primary logical drive.
The Defined Mappings pane in the Mappings tab is updated with this information:
  • The standard logical drive name is replaced with the World Wide Node Name.
  • The standard logical drive capacity is replaced with Unknown.
  • The standard logical drive type changes to Missing.

Example 7

A standard logical drive is participating in a remote logical drive mirror as a secondary logical drive. The secondary logical drive appears as missing.

Display Details Menu Options Available
In the Logical pane, the Missing Logical Drives group is created with the missing secondary logical drive shown in the group. Delete
The Defined Mappings pane in the Mappings tab is updated with this information:
  • The standard logical drive name is replaced with the World Wide Node Name.
  • The standard logical drive capacity is replaced with Unknown.
  • The standard logical drive type changes to Missing.

Example 8

Mirror relationships exist on this storage subsystem. The mirror repository logical drives exist in a different array than any of the logical drives that are participating in mirror relationships.

Only the mirror repository logical drives appear as missing. Two mirror repository logical drives are always shown, one for each controller. The controllers appear this way because when the Enhanced Remote Mirroring premium feature is activated, two mirror repository logical drives are placed together on the same array.

Display Details Menu Options Available
In the Logical pane, the Missing Logical Drives group is created with the missing mirror repository logical drives shown in the group. Delete from the right-click menu only

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