Mounting requests of a tape-processing program initiate the following actions:
ROBAR converts the BS2000 console messages directly into mount statements for ETERNUS CS.
ETERNUS CS processes the mount statements.
If the cartridge is mounted on a virtual MTC device and can be identified by the tape monitor of the BS2000 system (device management), the tape monitor itself responds to the mount message. In certain situations, e.g. in the case of a PREMOUNT message, during cartridge initialization, during FDDRL runs and all other special cartridge uses, ROBAR must send the BS2000 system issuing the request an acknowledgement of the volume mount operation.
Fast mount support
After it has been defined in the virtual archiving system, i.e. after it has been initialized, a virtual volume is automatically allocated to the “fast mount” category to which any unused virtual volume belongs. When a virtual volume is "mounted" for the first time, it is made available in the cache as a "fast mount" volume. In other words the volume is immediately available for writing. The time for mounting, etc. is irrelevant in the case of fast mount volumes.
Pre-restore function
ROBAR-SV supports the “pre-restore” function for cartridges to control ETERNUS CS. This permits early provision of the data residing on the cartridges in the ETERNUS CS system’s cache so that it can be used later.
When the BS2000 components DMS, ARCHIVE and FDDRL start to use a cartridge, they already know whether a continuation tape is to be processed later. They then issue the mount statement for the continuation tape by means of special console messages.
ROBAR takes into account the corresponding BS2000 messages DMS0DDE, ARC0850 and FBD4015 and sends the pre-restore request to ETERNUS CS.