Library /sys$common/syshlp/sysmanhelp.hlb DISKQUOTA, MODIFY, Qualifiers, /DEVICE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /DEVICE=device-spec

    Specifies the disk volume that contains the quota file. SYSMAN
    validates the device specification. A logical name may be
    specified for device-spec. If so, it is translated in the target
    environment.

    Without a device specification, SYSMAN uses the default disk
    on the target node. Unless you have set a default device with
    the SET PROFILE command, the default disk is the current device
    on the local node or the login default device on another node,
    depending on the established environment.