HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.1.x administrator guide (5697 - Page 447

Changes to configuration data Table 96 lists various combinations of before-and-after PID formats, and indicates whether the configuration is affected. NOTE: After changing the fabric PID format, if the change invalidates the configuration data (see Table 96 to determine this), do not download old (pre-PID format change) configuration files to any switch on the fabric. Table 96 Effects of PID format changes on configurations PID format before PID format after change change Configuration effect? Native Extended Edge No impact Extended Edge Native Core Extended Edge Native Core Native Core No impact You must: Reenable zoning, if there is an active zone set and it uses port zones. You do not need to reconfigure Destination ID (DID) if using: Performance monitoring The configure command to change the PID format The performance monitor database The zoning database The DID will be converted by Fabric OS automatically. After changing the fabric PID format and verifying correct fabric operation, resave configuration data by running the configUpload command. Before downgrading firmware, change the PID back to supported PIDs such as Core PID. If the database is automatically converted, save the converted database, and then download the older OS. Selecting a PID format All switches in a fabric must use the same PID format, so if you add a switch that uses a different PID format to a fabric, the switch will segment from the fabric. The format you select for your fabric depends on the mix of switches in the fabric, and to an extent on the specific releases of Fabric OS in use (for example, Extended Edge PID format is only available in Fabric OS 3.1.2 and later, and Fabric OS 4.2.0 through 5.3.0). If you are building a new fabric with switches running various Fabric OS versions, use Core PID format to simplify port-to-area_ID mapping. NOTE: Switches that are queried using outside calls should be configured using PID 1 (core PID) to ensure that the correct port numbering is used in other management applications. Fabric OS 6.1.x administrator guide 447