Hitachi Dynamic Link Manager Software Users Guide for Linux

The shaded portion shows the SCSI device to be managed by HDLM.
Execute the following command on this SCSI device to unmount it:
# umount /mntpt
5. If the disks are set to be mounted automatically when the host starts,
delete this setting from the /etc/fstab file.
An example of how to edit the /etc/fstab file is shown in
Figure 3-3
Example of How to Edit the /etc/fstab File on page 3-103.
Figure 3-3 Example of How to Edit the /etc/fstab File
Comment out the shaded portions by placing a hash mark (
#) at the
beginning of each line. The Linux functionality that adds LABEL= to a SCSI
device is not supported in HDLM. Do not use this functionality.
Checking the Volume Group
If you have already created a physical volume, volume group, or logical
volume by using LVM, you can use the procedure described in
Settings for
LVM2 on page 3-171 only when all of the conditions below are satisfied.
Migration is not affected even when a logical volume or file system has been
created.
• A physical volume is created for only one of the logical device files on any
one path for each SCSI device to be managed by HDLM. In addition, a
volume group is created for only the physical volume.
This subsection describes how to check whether this condition exists.
• The logical volume is unmounted.
The following explains how to check whether the above condition exists when
the volume group vg02 consists of either one physical volume or two physical
volumes. Note that /dev/sde and /dev/sdu are assumed to be the logical
device files of SCSI devices defined for the same device to be managed by
HDLM.
To check the physical volumes that belong to the volume group vg02, execute
the following command:
# vgdisplay -v
The following figures show examples of command execution when the volume
group consists of only one physical volume (condition satisfied) and when the
volume group consists of two physical volumes (condition not satisfied).
Creating an HDLM Environment
3-103
Hitachi Dynamic Link Manager (for Linux®) User Guide