Hitachi Dynamic Link Manager Software Users Guide for Solaris

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Changing an LU
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• Changing the host LUN
• Changing, adding, or deleting a CHA port
• Changing a target ID
• Adding or replacing a Fibre Channel switch
• Replacing, deleting, or adding an HBA
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To change an LU, we recommend that you add a new LU and then delete
the existing one, rather than changing a LU in the storage system
management program. After adding the new LU, move data as required
from the LU you are deleting to the new LU. For details on adding a new
LU, see Adding a New Logical Unit on page 4-22. If you use the storage
system management program to change the LDEV of the LU, an instance
of the HDLM driver will not be created. As a result, it may not be possible
to verify the changed configuration until you create an HDLM driver
configuration definition file (/kernel/drv/dlmfdrv.conf).
Note
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The following assumptions are made about the environment:
- The environment is a local disk boot environment.
- If the environment is a SAN boot environment, the HBA to be
replaced is not connected to the boot device.
Changing the Configuration by Restarting the Host
1. Back up the data in the file systems, volumes, and metadevices that use
the HDLM device you are reconfiguring.
2. Execute the umount command to unmount all mount points that use
HDLM:
# umount mount-point
3. If HDLM devices are being used in ZFS, execute the following command to
export all their ZFS storage pools:
# zpool export pool-name
4. Edit the /etc/vfstab file.
In the /etc/vfstab file, delete or comment out the specifications of the
logical device files for the HDLM devices (cUtXdYsZ) and the ZFS file
system whose configurations you want to change, and then release the
setting for automatic mounting.
5. If you are using Sun Cluster, clear the settings for the disk device group
that contains the HDLM devices you are reconfiguring. If a Quorum device
is among the HDLM devices you are reconfiguring, clear the Quorum
device settings.
HDLM Operation
4-37
Hitachi Dynamic Link Manager (for Solaris) User Guide