HP Archive Backup System for OpenVMS Guide to Operations

4.2.20 User Rights
4.3 Drives
4.3.1 Access
4.3.2 Automatic Reply
4.3.3 Device
4.3.4 Disabled
Media Management
4.3 Drives
The right MDMS_USER_RIGHTS is a high-level right that maps to a set of low level rights
suitable for non-privileged users that perform ABS or HSM operations. The default set of user
rights allow for user activities such as creating and manipulating their own volumes and loading
and unloading those volumes into drives, showing their volumes. However, you can add or
remove low level rights to/from the user rights as you wish.
A drive is a physical resource that can read and write data to tape volumes. Drives can be standalone
requiring operator intervention for loading and unloading, in a stacker configuration that
allows limited automatic sequential loading of volumes, or in a jukebox which provides full random-access
automatic loading. Drives are named in MDMS using a unique name across the
domain; it may or may not be the same as the OpenVMS device name, as these may not be
unique across the domain.
The following sections describe the attributes of a drive.
The access attribute controls whether the drive may be used from local access, remote access or
both. Local access includes direct SCSI access, access via a controller such as the HSJ70, access
via TMSCP, or access via Fibre Channel, and does not require use of the Remote Device Facility
(RDF). Remote access is via a DECnet network requiring RDF. You can set the access to one of
the following:
• All - Allows both local and remote access (default)
• Local - Allows only local access (as defined above)
• Remote - Allows only remote access using RDF
Automatic reply is the capability of polling hardware to determine if an operator-assist action
has completed. For example, if MDMS requests that an operator load a volume into a drive,
MDMS can poll the drive to see if the volume was loaded, and if so complete the OPCOM
request without an operator reply. Set automatic reply to enable this feature, and clear to require
an operator response. Please note that some operations cannot be polled and always require an
operator reply. The OPCOM message itself clearly indicates if a reply is needed or automatic
replies are enabled.
The device attribute is the OpenVMS device name for the drive. In many cases you can set up
the drive name to be the OpenVMS device name, and this is the default when you create a drive.
However, the drive name must be unique within the domain, and since the domain can consist of
multiple clusters there may be duplicate device names across the domain. In this case you must
use different drive names from the OpenVMS device names. Also, you can specify simple or
descriptive drive names which are used for most commands, and hide the OpenVMS device in
the device name attribute.
By default, drives are enabled, meaning that they can be used by MDMS and its applications.
However, you may wish to disable a drive from use because it may need repair or be used for
some other application. Set the disable flag to disabled the drive, and clear the flag to enable the
drive.
Media Management 4–5