Volume/device status

The shared DASD facility requires that certain combinations of volume characteristics and device status be in effect for shared volumes or devices. Table 1 shows the combinations that must be in effect for a volume or device:

Table 1. Valid Volume Characteristic and Device Status Combinations
System A	Systems B, C, D
Permanently resident	Permanently resident
Reserved	Reserved
Removable	Offline - Non-JES3 devices
Removable	Removable - JES3 - managed devices
Offline	Removable, reserved, or permanently resident (In JES2, if a device is removable in one system, it must be offline in all others.)

If a volume or device is marked removable on any one system, the device must be either in offline status or removable status on all other systems. The mount characteristic of a volume and/or the status of a device can be changed on one system as long as the resulting combination is valid for other systems sharing the volume or device. No other combinations of volume characteristics and device status are supported.