For requests to shared pubsets it is generally the case that a slave sharer sends the requests to the master sharer for processing if BACKUP-SERVER-USAGE=*NO is specified in the archive definition, If *STD is specified, depending on the HSMS parameter BACKUP-SERVER the requests are sent to the master sharer or to the backup server which is specified explicitly.
HSMS supports the sending of requests without restriction if an earlier HSMS version is being used on the slave sharer than on the master sharer. In HSMS < V10.0 the requests are sent to the master sharer as the backup server function is not supported in these versions.
If an earlier HSMS version is being used on the master sharer than on the slave sharer, the request will only be accepted if the master sharer supports all the functions that are necessary for correct processing of the request (see section "Working with SM pubsets and different HSMS versions").