HP 3000 Manuals HP 3000 Manuals
Unloading A System Disk It is necessary to =SHUTDOWN the operating system (MPE) before attempting to UNLOAD or "spin down" a disk in the system domain. If the LOAD/UNLOAD button on the disk drive is inadvertently pressed while the system is running, the system disk will refuse to UNLOAD. The ACTIVITY panel will indicate "BUSY", momentarily, and the following message will appear on the system console: __________________________________________________________________ | | | | | UNLOAD ON LDEV#n DENIED.=SHUTDOWN MUST PRECEDE AN | | UNLOAD ON A SYSTEM DISC | | Warning: REPOSITION BUTTON BACK TO LOAD POSITION. | | | __________________________________________________________________ Note that if the LOAD/UNLOAD button is not repositioned to the LOAD position, and a powerfail occurs, the drive will spin down, and a NOT READY message will appear on the system console. At this point, it is necessary to reposition the LOAD/UNLOAD button back to the LOAD position in order to spin the drive up. If the system is shut down before the LOAD/UNLOAD button is repositioned (set to the "in" position), it is necessary to reposition the button to the LOAD position, then again to the UNLOAD position, since the first UNLOAD request was denied by the system.