Reserve/Release Summary
Table 1 summarizes the differences between different settings of SET SHARED and the V attribute of the MDISK directory statement.
| SET SHARED | V Attribute on MDISK | Description |
|---|---|---|
| ON | No V attribute | The minidisk cannot be shared between a virtual machine guest and a native system. There is no virtual reserve/release. |
| ON | V attribute | Both real and virtual reserve/release are available. The minidisk can be shared between virtual machine guests and a native system. |
| OFF | V attribute | Only virtual reserve/release is available; no real reserves are issued. The minidisk cannot be shared with a native system. |
| OFF | No V attribute | No reserve/release support is available at all. |
In an SSI cluster, virtual reserve/release can be used on only one system at a time for a given minidisk.