Several BS2000 systems can jointly access Net-Storage volumes from shared pubsets.
All sharers must connect themselves to the corresponding Net-Storage (MOUNT-NET-STORAGE).
In the shared pubset network a new Net-Storage volume can be created or deleted only on the master computer. If a Net-Storage volume was created on the master, this Net-Storage volume must also be made known and assigned on each slave using the ADD-NET-STORAGE-VOLUME command. Only then can the Net-Storage volume also be accessed from a slave system computer (IN-USE status). This assignment is retained until the pubset is exported.
Subsequently the Net-Storage volume is immediately available again (provided a connection exists to the Net-Storage), also when IMPORT-PUBSET is issued again on a slave computer.
When the master is changed, the system updates the master SYSID entered on the associated Net-Storage volumes. However, this is only possible for available Net-Storage volumes (status: IN USE). If a Net-Storage volume was not available when the master was changed (not connected or not occupied (status: ONLINE)), the first time the volume is accessed message DMS1326 is displayed on the console of the master computer and must be answered. For Net-Storage volumes of the NETVOL type, the master can also be a BS2000 <V21.0, since with this type the master does not need to have access to the Net-Storage volume itself.
Net-Storage volumes of the NETVOL type are not supported in BS2000 <V21.0A. Under BS2000 versions <V21, the data from Net-Storage volumes of the NETVOL type cannot be backed up or restored to Net-Storage volumes of the NETVOL type. On the other hand, it is possible to restore files that were backed up from volumes of the NETVOL type under BS2000 V21 to volumes of the NETSTOR type. To do this, the appropriate volume must be specified under NEW-SUPPORT (see HSMS manual instructions). This is particularly important in shared pubset operation, since HSMS jobs are usually sent from the slave system to the master or backup server and processed there.