The device management facility of BS2000 (Nucleus Device Management, NDM) manages the peripheral configuration of a Server Unit. The channel peripherals of the SUs /390 are predefined during hardware generation with IOGEN (see the “System Installation” manual [55]). The bus and Fibre Channel peripherals of the SUs x86 are made known via X2000.
Device management incorporates the following functions:
controlling the availability of all hardware units and their connections with respect to the system
making available allocation and release mechanisms for devices and volumes
handling mount jobs for volumes and protecting these volumes against illegal operator intervention
enabling the reservation of devices, volumes and files according to job priorities
providing information on allocation and availability states of the configuration
This chapter looks in detail at configuration, reconfiguration and dynamic I/O reconfiguration for SUs /390. The differences for SUs x86 are pointed out.
The NDM (Nucleus Device Management) component for resource allocation and reservation plus the monitoring, selection and operation of public data volumes are then described.
Next follows detailed information on error handling for selected device controllers and on managing private data volumes Detailed information on the IORM utility routineis closing this chapter.