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Pre-cluster drive name formats

During steady-state operations, drive names are independent of their physical connection and unaffected by the node from which they are viewed. However, during system boot, before a node has joined a cluster, and if certain system components become unavailable, drive names revert to the format used before Data ONTAP 8.3, the pre-cluster format.

The pre-cluster names of unowned drives (broken or unassigned drives) display the alphabetically lowest node name in the cluster that can see that drive.

The following table shows the various formats for pre-cluster drive names, depending on how they are connected to the storage system.
Note: For internal drives, the slot number is zero, and the internal port number depends on the system model.
Drive connection Drive name Example
SAS, direct-attached <node>:<slot><port>.<shelfID>.<bay> The pre-cluster name for the drive in shelf 2, bay 11, connected to onboard port 0a and owned by node1 is node1:0a.2.11.

The pre-cluster name for the drive in shelf 6, bay 3, connected to an HBA in slot 1, port c, and owned by node1 is node1:1c.6.3.

SAS, direct-attached in multi-disk carrier disk shelf <node>:<slot><port>.<shelfID>.<bay>L<carrierPosition> Carrier position is 1 or 2.
SAS, direct-attached, for systems running Data ONTAP-v <slot><port>.<ID> The pre-cluster name for the third virtual disk connected to the first port is 0b.3. The pre-cluster name for the second virtual disk connected to the third port is 0d.2.

The range of ports is b through e, and the range of disks is 0 through 15.

SAS, bridge-attached (FibreBridge, used for MetroCluster configurations) <slot><port>.<loopID>L<LUN> The pre-cluster name for the drive with LUN 2 behind the bridge connected to port a in slot 3, loop ID 125, is 3a.125L2.
SAS, bridge-attached through a switch (FibreBridge, used for MetroCluster configurations) <switch_name>:<switch_port>.<loopID>L<LUN> The pre-cluster name for the drive with LUN 5 behind the bridge connected to port 2 of switch brcd44, loop ID 126, is brcd44:2.126L5.
FC, direct-attached <node>:<slot><port>.<loopID> The pre-cluster name for the drive with loop ID 19 (bay 3 of shelf 1) connected to onboard port 0a and owned by node1 is node1:0a.19.

The pre-cluster name for the drive with loop ID 34 connected to an HBA in slot 8, port c and owned by node1 is node1:8c.34.

FC, switch-attached <node>:<switch_name>.<switch_port>.<loopID> The pre-cluster name for the drive with loop ID 51 connected to port 3 of switch SW7 owned by node1 is node1:SW7.3.51.

Each drive has a universal unique identifier (UUID) that differentiates it from all other drives in the cluster.