Technical data

Managing Storage Media

9.5 Mounting Volumes

Examples

$ SET VOLUME/DATA_CHECK=(READ,WRITE) DKA100:

This command requests that data checks be performed following all read and

write operations to the DKA100: volumes.

$ SET VOLUME/LABEL=LICENSES DKA100:

This command encodes the label LICENSES on the DKA100: volume. Note

that, if characters in labels are entered in lowercase, the /LABEL qualiﬁer

changes them to uppercase.

9.5.7 Speeding Up Disk Mounting

The DISKMOUNT.C program can help to speed up disk mounts at system startup

time. The program reduces the MOUNT image activation time by directly calling

the $MOUNT system service.

Note

DISKMOUNT.C does not support mounting of disks connected to an

InfoServer, disks served using DFS, or stripe sets.

This program requires a VAX C compiler. Perform the following steps:

1. Copy the ﬁles DISKMOUNT.H, DISKMOUNT.C, and DISKMOUNT_CHILD.C

in SYS$EXAMPLES to a directory.

2. Deﬁne a logical name ‘‘SRC$’’ that points to this directory.

3. Assemble the DISKMOUNT.C and DISKMOUNT_CHILD.C ﬁles.

4. Link DISKMOUNT.OBJ and DISKMOUNT_CHILD.OBJ to produce the

DISKMOUNT.EXE and DISKMOUNT_CHILD.EXE executable image ﬁles.

5. Copy these executable images to a directory, preferably SYS$MANAGER on

the target system.

For additional information, see the comments in the DISKMOUNT.H ﬁle.

9.6 Setting Up Disk Volume Sets

The following sections discuss concepts related to disk volume sets and explain

how to perform the following actions:

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 Section 9.6.4

Add volumes to a disk volume set Section 9.6.5

9–42 Managing Storage Media