When a node is part of a functioning cluster, the drives it is connected to are accessible using a simple, consistent drive name format. The drive name is independent of what nodes the drive is physically connected to and from which node you are accessing the drive.
The drive name format is a concatenation of four components:
Stack IDs are unique across the cluster, and start with 1.
If there is a shelf ID conflict for SAS shelves, the shelf id is replaced with the shelf serial number in the drive name.
You can find the bay map in the administration guide for your storage shelf.
For carriers that house two disks, it can be 1 or 2.