Device number constraints
Many of the DPM objects and elements objects have device-number properties that allow an API client to view and/or modify the device number for the devices represented by those objects. In such cases, the values of the device-number properties for all devices associated with a single partition are always constrained. There are two distinct device number namespaces for channel-based and PCI-based devices.
Channel-based device numbers
The device numbers for all channel-based devices associated with a single partition must be unique. The following objects and element objects are channel-based:
- All Partition NIC elements of type "iqd" or "osd".
- All Partition HBA elements.
- All Storage Group Storage Volume elements of storage groups of type "fc".
- All Storage Group Virtual Storage Resource elements.
- All Tape Link Virtual Tape Resource elements.
PCI-based device numbers
The device numbers for all PCI-based devices associated with a single partition must be unique. The following objects and element objects are PCI-based:
- All Partition NIC elements of type "roce" or "cna".
- All Partition Virtual Function elements.
- All Storage Group Storage Volume elements of storage groups of type "nvme".