DISMOUNT

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 3-3 “Command Acceptance of Naming Conventions - DISMOUNT Command” is a comparison of naming conventions between the MPE/iX VSxxxxxx and MPE V/E xxxMOUNT commands

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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