Evaluating Condition
Values Returned by $DISMOU and $MOUNT
This
section discusses the condition values returned by the $DISMOU and
$MOUNT system services that pertain to mounting and using shadow
sets. For a complete list of the condition values returned by these services,
refer to the HP OpenVMS System Services Reference Manual.
If $MOUNT returns the condition value SS$_BADPARAM, your item
list probably contains one of the following errors:
The virtual unit specified in one
of your MNT$_SHANAM item descriptors contains a name other than DSAn:.
A MNT$_SHAMEM item descriptor appears in the item
list before any MNT$_SHANAM item descriptor.
Your item list contains a MNT$_SHANAM item descriptor,
but it is not followed by the item descriptor MNT$_SHAMEM.
A MNT$_DEVNAM item descriptor appears in the item
list in the middle of a series of item descriptors that specify
a single shadow set. You can construct a volume set that contains
one or more nonshadowed disks, as well as one or
more shadow sets. However, when you use the MNT$_DEVNAM item descriptor to
specify the nonshadowed disk, it must not appear between the MNT$_SHANAM
item descriptor that specifies a virtual unit and the item descriptors
that specify the members of the shadow set that the virtual unit
represents.
The following list contains possible status messages
that $MOUNT can return when mounting and using shadow sets:
SS$_VOLINV (label mismatched)
SS$_SHACHASTA (shadow state change occurred during
a mount operation)
SS$_MEDOFL (physical unit not accessible)
SS$_INCSHAMEM (physical disk incompatible for shadow
set)
See also Appendix
A for shadowing-related status messages.