Disk names

Each disk has a unique name that differentiates it from all other disks in the storage system. Disk names have different formats depending on the disk connection type (FC or SAS) and whether the disk is directly attached to the storage system or attached to a switch.

Each disk also has an identifier, or ID, that differentiates it from all other disks on its loop or stack. The ID is included in the disk name.

• Disk IDs for FC-AL connected disks
  For disks connected using Fibre Channel-Arbitrated Loop (FC-AL or FC), the disk ID is an integer from 16 to 126.
• Disk IDs for SAS-connected disks
  For SAS-connected disks, the disk ID corresponds to the shelf ID and the drive bay number within that shelf. Internal disk drives are considered to be on shelf 0.
• Disk names for direct-attached disks
  Names for direct-attached disks (disks that are attached directly to the storage system rather than through a switch) are based on the host adapter or port number, followed by the disk ID, in the following format: portID.diskID.
• Disk names for switch-attached disks
  Switch-attached disks (disks that are attached to the storage system through a switch) use the following name format: Switch_name:switch_port.diskID.