Technical data

Managing Storage Media
9.6 Setting Up Disk Volume Sets
system files move or extend to other volumes in the set, the system might
fail to boot.
You do not need special privileges to create volume sets. However, you must have
write access to the index file on all volumes you are attempting to bind into a
volume set; this usually means you also must have a system UIC, have the user
privilege SYSPRV, or be the owner of the volumes.
The following sections explain how to perform these tasks:
Task Section
Create a disk volume set from new volumes Section 9.6.2
Create a shadowed disk volume set Section 9.6.3
Create a disk volume set from an existing volume and a new
volume
Section 9.6.4
Add volumes to an existing disk volume set Section 9.6.5
9.6.2 Creating a Disk Volume Set from New Volumes
To create a disk volume set from new disk volumes:
1. Allocate the necessary devices and physically load the volumes.
2. Initialize each volume in the set.
When you initialize volumes for a volume set, you can use qualifiers with
the INITIALIZE command to define the volume ownership and protection.
Protection and ownership information is obtained from the root (first) volume.
The protection and ownership of the other volumes is ignored.
3. Enter the MOUNT/BIND command to create the volume set. The
MOUNT/BIND command both creates the volume set and mounts the
volumes. When this command completes successfully, all volumes in the set
are ready for use; in other words, you can now create user file directories.
4. Use the /BIND qualifier only once to create the volume set. Subsequently, you
can mount the volume set with a single MOUNT command.
Examples
1.
$ INITIALIZE DUA1: PAYVOL1
$ INITIALIZE DUA2: PAYVOL2
$ INITIALIZE DUA3: PAYVOL3
$ MOUNT/BIND=MASTER_PAY DUA1:, DUA2:, DUA3: PAYVOL1,PAYVOL2,PAYVOL3
This example assumes that the volumes to be bound contain no files or
data. The INITIALIZE command initializes each volume in the set. The
MOUNT/BIND command defines the volume set name, MASTER_PAY, and
defines the relative volume numbers of the volumes PAYVOL1, PAYVOL2,
and PAYVOL3.
The order of the device names corresponds to the volume labels specified:
PAYVOL1 must be physically loaded on DUA1:, PAYVOL2 on DUA2:, and
PAYVOL3 on the DUA3: device.
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