LMOUNT

Operation Notes

When the console operator executes the LMOUNT command, all disk drives containing members of the specified volume set become RESERVED. Each volume set is logically attached to the drive until an LDISMOUNT command is executed, at which time the disk drive is no longer reserved on a system-wide basis. A VSCLOSE may then be issued to remove the volume set. (Refer to the VSCLOSE command in this chapter.)

Executing an LMOUNT command does not prevent users from issuing a MOUNT command for the volume set in question. Users may issue a DISMOUNT command for the specified volume set, but doing so has no effect; the LMOUNT command takes priority over a general user command.

System users issue mount requests implicitly through their programs, or explicitly with a MOUNT command.

If the mountable volumes facility was enabled with VMOUNT ON,AUTO, MPE/iX automatically attempts to satisfy the mount request; the LMOUNT succeeds if the specified volume set is physically connected to the system.

If the mountable volumes facility was enabled with VMOUNT ON (omitting the AUTO parameter), you must reply to your own mount request, even though the volume set may already be mounted and in use.

Volume sets in MPE/iX are not tied to groups and accounts. This is different from the MPE V/E scheme of disk partitioning.

The MPE/iX new naming convention for volume sets differs from the MPE V/E naming convention for private volumes. MPE/iX volume set names may consist of any combination of alphanumeric characters, including the underbar (_) and the period (.). The name must begin with an alphabetic character and consist of no more than 32 characters.

Table 5-4 “Command Acceptance of Naming Conventions - LMOUNT Command” illustrates the difference between naming conventions for MPE/iX volume sets and MPE V/E private volumes.

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 that 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 Hewlett-Packard users, MPE/iX accepts the naming convention that was used for MPE V/E private volumes.Thus MOUNT V.G.A succeeds and MOUNT V accesses 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, VSRESERVE V succeeds only if there is a volume set V in existence. The MPE/iX commands does not call up any default specifications for group and account. VSRESERVE V.G.A succeeds only if a volumeset V.G.A is online. With MPE/iX 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.

It is recommended that you not use the MPE V/E naming convention and xxxMOUNT commands. Instead use the MPE/iX naming convention and VSxxxxxx commands. Alternating between MPE V/E and MPE/iX commands 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. It is executable only at the console unless distributed to users with the ALLOW command.

Examples

To reserve a volume set named DATABASE.PAYROLL.ACCTNG, enter:

 LMOUNT DATABASE.PAYROLL.ACCTNG

You may also use the VSRESERVESYS command:

 VSRESERVESYS DATABASE.PAYROLL.ACCTNG