NetBackup robotic control, communication, and logging for Windows systems
The NetBackup acsd process provides robotic control to mount and dismount volumes. It also requests inventories of the volumes that are under the control of ACS library software. The NetBackup Device Manager service ltid starts the acsd process and communicates with it.
The acsd process requests SCSI tape unloads through the device host's tape driver before it uses the ACS API to request that tape dismounts. This request process accommodates the configurations that have SCSI multiplexors. Loaded tapes are not ejected forcibly when a dismount operation occurs.