HP 3000 Manuals HP 3000 Manuals
DISMOUNT
Releases a volume set that was explicitly reserved by the user with a
MOUNT or VSRESERVE command. The equivalent native mode command is
VSRELEASE. (Native Mode)
Syntax
[{* }]
DISMOUNT [{ }][.groupname[.acctname]]
[{volumesetname}]
Parameters
* or <blank> Specifies the home volume set for the group and
account specified, or for the logon group and
account if groupname or groupname.acctname is not
specified.
volume- setname An artificial component of a volume set name used
to maintain backward compatibility with MPE V/E.
The volumesetname can be a maximum of 8 characters.
groupname Used only for compatibility with MPE V/E. The
groupname can be a maximum of 8 characters.
acctname Used only for compatibility with MPE V/E. The
acctname can be a maximum of 8 characters.
Operation Notes
The DISMOUNT command allows you to release a volume set that you
explicitly reserved using the MOUNT or VSRESERVE command. You can
request a release only for a volume set that you have reserved; you
cannot alter the status of the volume set for other users.
Volume sets in MPE/iX are not tied to groups and accounts (this differs
from the MPE V/E scheme of disk partitioning).
The naming convention for MPE/iX volume sets differs from the naming
convention for MPE V/E private volumes. MPE/iX volume set names may
consist of any combination of alphanumeric characters, including the
period (.) and the underbar (_). The name must begin with an alphabetic
character and consist of no more than 32 characters. Table 2-7 is a
comparison of naming conventions between the MPE/iX VSxxxxxx and MPE V/E
xxxMOUNT commands.
Table 2-7. Command Acceptance of Naming Conventions - DISMOUNT Command
-----------------------------------------------------------------------------------------------
| | | |
| Specify | MPE V/E xxxMOUNT Command Accesses | MPE/iX VSxxxxxx Command |
| | | Accesses |
| | | |
-----------------------------------------------------------------------------------------------
| | | |
| myset.grp.acct | The volume set named myset.grp.acct. | The volume set named |
| | | myset.grp.acct. |
| | | |
-----------------------------------------------------------------------------------------------
| | | |
| myset | The volume set named | The volume set myset. |
| | myset.logongrp.logonacct. | |
| | | |
-----------------------------------------------------------------------------------------------
| | | |
| *.grp.acct | The home volume set of the group grp | Causes an error. |
| | in account acct. | |
| | | |
-----------------------------------------------------------------------------------------------
| | | |
| myset_grp_acct | Error (name component longer than | The volume set named |
| | eight characters). | myset_grp_acct. |
| | | |
-----------------------------------------------------------------------------------------------
| | | |
| m_g_a | The volume set named | The volume set named |
| | m_g_a.logongrp.logonacct, provided it | m_g_a. |
| | exists. If it does not exist, an | |
| | error is reported. | |
| | | |
-----------------------------------------------------------------------------------------------
In MPE V/E, the name V.G.A indicates that V is the name of a volume set,
that G is the name of a group, and that A is the name of an account.
MPE/iX accepts the V.G.A. name in that form, but no interpretation is
made as to the referencing of G and A. Instead, MPE/iX treats
V.G.A as a single, long string name, just as it would treat
A_VERY_LONG_NAME_FOR_SOMETHING.
As a convenience to established HP users, MPE/iX accepts the naming
convention that was used for MPE V/E private volumes. DISMOUNT V.G.A
will succeed. DISMOUNT V will access the same volume set, provided you
are logged on to account A, group G. The MPE V/E commands are able to
default the logon account and group.
However, VSRELEASE V succeeds only if a volume set V exists. The MPE/iX
commands do not call up any default specifications for group and account.
VSRELEASE V.G.A succeeds only if a volumeset V.G.A is on line. With all
VSxxxxxx commands, the .G.A component of this name is interpreted as a
string, neither more nor less specific than _G _A.
If a volume set is named according to the MPE V/E naming convention
(V.G.A), you must use an unambiguous reference when using the MPE/iX
volume set commands.
We recommend that you do no use the
MPE V/E naming convention and the xxxMOUNT commands. Instead use the
MPE/iX naming convention and the VSxxxxxx commands. Alternating between
MPE V/E and MPE/iX commands may lead to confusion and, in some cases, may
lead to errors. For example, MOUNT X used in a job stream attempts to
access a volume set named X.logongrp.logonacct, which may or may not be
your intention.
Use
This command may be issued from a session, job, program, or in BREAK.
Pressing Break has no effect on this command. Use volumes (UV) or create
volumes (CV) capability is required to use this command.
Examples
To release the volume set MYSET.B.C, that was previously reserved with a
MOUNT or VSRESERVE command, enter:
DISMOUNT MYSET.B.C
You may also use the VSRELEASE command:
VSRELEASE MYSET.B.C
Related Information
Commands MOUNT, LMOUNT, DSTAT, VSRESERVE, VSRELEASE
Manuals Volume Management Reference Manual (32650-90045)