1    /CAPACITY

       /CAPACITY=blocks

    This qualifier is required. You must specify the size of the memory
    disk to create or modify in blocks (512 bytes). Capacity=0 will
    return the memory to the operating system.

2    /MEMORY

 	/MEMORY=type

    This qualifier is not required and defaults to local. LOCAL means
    create the memory disk in local private memory. SHARED means create
    the memory disk in Galaxy shared memory. Local memory can be accessed
    on only the node or instance where it resides. Shared memory can be
    accessed from any Galaxy instance that attaches to the shared memory.
    Shared memory requires VMS Galaxy software to be loaded and running.

3    /PERSIST

 	/[no]PERSIST

    This qualifier is not required and defaults to /PERSIST. It
    controls whether or not the disk is restored after a reboot.

    Note that /nopersist and /serve are mutually exclusive.

4    /SERVE

 	/[no]SERVE

    This qualifier is not required and defaults to /NOSERVE. It
    controls whether or not disk serving is available for the
    VMSCluster. When /SERVE is selected, the disk is MSCP
    served. Once a disk is selected /SERVE it cannot be selected
    /NOSERVE.

    Note that /nopersist and /serve are mutually exclusive. Also
    note that served device numbers cannot exceed 9999.

5    /ALLOCLASS

 	/ALLOCLASS=number

    This qualifier is not required and defaults to 99. It is only
    allowed for SHARED memory type disks. Note that associating a
    particular controller letter with a specific allocation class
    is valid for all time! All time means as long as the shared
    memory section exists or the MDRECOVER.DAT file exists. Selecting
    an allocation class equal to the node's allocation class for
    shared memory disks is not allowed.

6    /WRITEBUFFERED

 	/[no]WRITEBUFFERED

    This qualifier is not required and defaults to /NOWRITEBUFFERED.
    It is selected to help reduce write recovery time after a power
    fail or system crash. Application recovery techniques and OpenVMS
    Volume Shadowing can also be used to reduce write recovery time
    after a power fail.

7    /RAD

 	/RAD=stripe	(default)
 	/RAD=number
 	/RAD=home
 	/RAD=(,,,)

     This qualifier is not required and defaults to striping the
     memory disk across all available RADs for local and shared disks.
     It is only effective when RAD SUPPORT is enabled on the system.
     It is used to specify a single RAD (i.e., a number such as 2) for
     both local and shared memory, or a comma separated list of RADs
     for shared memory only. It can also be used to select the home RAD
     or to change from a single RAD to striping.