K.5.7 Changing the GDS Settings

If you selected one of the following copy methods in "K.1.3 Copying Method for Data Disk (GDS)", delete the GDS configuration information on the target cluster system.

"When not using the mirroring among servers " of "When making the GDS configuration of the copy destination the same as the configuration of the copy source "
"When making the GDS configuration of the copy destination different from the configuration of the copy source"

Deletion of shared disk resources
If shared classes are used in the copy source, delete the class and disk resources.
Perform this setting on any node configuring a cluster system.
1. Delete all class resources
  Example: Deleting class resource Class1
```
#/etc/opt/FJSVsdx/bin/sdxdcrsc -R -c Class1
```
2. Confirm the resource IDs of the registered disk resources.
  The resource IDs of the disk resources are the underlined portions of the entries for "SHD_DISK" and "DISK" in the following command output results.
```
# /etc/opt/FJSVcluster/bin/clgettree
...
     SHD_DISK 35 SHD_Disk35 UNKNOWN
       DISK 37 sdag UNKNOWN fuji4
       DISK 153 sdw UNKNOWN fuji5
...
```
3. Delete all the disk resources that were checked in Step 2.
  Example: The resource IDs of the registered disk resources are "35", "37", and "153".
```
# /etc/opt/FJSVcluster/bin/cldelrsc -r 35
# /etc/opt/FJSVcluster/bin/cldelrsc -r 37
# /etc/opt/FJSVcluster/bin/cldelrsc -r 153
```
Deletion of the GDS management information
On all the nodes configuring a cluster, delete all lines that are described in the /etc/opt/FJSVsdx/sdx.udev file.
```
# cat /dev/null > /etc/opt/FJSVsdx/sdx.udev
```
Deleting iSCSI Settings
If you selected the "When making the GDS configuration of the copy destination different from the configuration of the copy source" and the copy source is using the mirroring among servers, delete iSCSI settings used for mirroring among servers.
To delete the iSCSI settings, refer to "Deleting iSCSI Settings Used for Mirroring among Servers" in "PRIMECLUSTER Global File Services Configuration and Administration Guide."
Restart OS on all the nodes.

K.5.7.2 Restoring the GDS Configuration Information

If you selected the copy method of "When not using the mirroring among servers" from "When making the GDS configuration of the copy destination the same as the configuration of the copy source " in "K.1.3 Copying Method for Data Disk (GDS)", restore the GDS configuration information to the copy destination cluster system.

Note

When using the mirroring among servers, this procedure is unnecessary.

Re-registration of shared disk resources
If shared classes are used in the copy source, re-register the shared disks in the resource database.
For details, see "2. Registering a shared disk" in the "5.1.3.2 Registering Hardware Devices."
Change the physical disk name in GDS configuration files.
If the physical disk names registered in the GDS class are different in the copy source and destination systems, use the "sdxconfig Convert" command to change the physical disk names in the configuration file to the physical disk names in the copy destination system.
Example: Changing the physical disk described in the "/var/tmp/Class1.conf" configuration file from "sdb" to "sdc"
```
# sdxconfig Convert -e replace -c Class1 -p sdb=sdc -i /var/tmp/Class1.conf -o /var/tmp/Class1.conf -e update
```
Change of physical disk names in the Excluded List of GDS
In environments using the Excluded List, if the physical disk names entered in the Excluded List are different in the copy source and destination systems, change the physical disk names to those entered in the Excluded List for the copy destination system. Perform this task on all the nodes.
For details on the Excluded List, see "PRIMECLUSTER Global Disk Services Configuration and Administration Guide."
Restoring the object configuration information of local and shared classes
Perform the following operation on any node.
- If private slice data were copied
```
# sdxconfig Restore -c Class1 -i /var/tmp/Class1.conf -e chkps
```
- If private slice data were not copied
```
# sdxconfig Restore -c Class1 -i /var/tmp/Class1.conf
```
Note
After restoring with the "sdxconfig Restore" command, shared classes become local classes.
If the following message is displayed, take corrective measures with reference to "PRIMECLUSTER Global Disk Services Configuration and Administration Guide."
ERROR: device: disk label is not matched with class class
Restart OS on the node where the object configuration of the class is restored in Step 4.
Change of the class attribute
If the Class is a shared class, change the restored class from local class to shared class.
Perform the following operation on the nodes on which you restored the class object configuration in Step 4.
1. Stop the GDS volume.
```
# sdxvolume -F -c Class1
```
2. Change class attribute to shared class.
```
# sdxattr -C -c Class1 -a type=shared,scope=fuji4:fuji5
```
Preliminary setup for Gds resources used in RMS
Perform the following operation on any node.
```
# /opt/SMAW/SMAWRrms/bin/hvgdsetup -a Class1
```
Start the GDS volume.
If the GDS volume stopped in Step 6. includes any GDS shared class volumes which are not registered to RMS (e.g. classes used by GFS), restart the volume manually, since it will not start automatically at the time of starting the RMS.
Example: Starting classes used by GFS (gfs and gfs01)
```
# sdxvolume -N -c gfs
# sdxvolume -N -c gfs01
```

K.5.7.3 Setting up GDS and Restoring the Data

If you selected the copy method of "When making the GDS configuration of the copy destination different from the configuration of the copy source" in "K.1.3 Copying Method for Data Disk (GDS)", set up GDS and restore the data to the copy destination cluster system.

When building the mirroring among servers, set up iSCSI disks. See "Disk Setting for Performing Mirroring among Servers" in "PRIMECLUSTER Global File Services Configuration and Administration Guide."

Registering a shared disk
Register a shared disk in the resource database. See, "1. Registering a shared disk" in "5.1.3.2 Registering Hardware Devices."
Setting up GDS
Register disks into classes, create groups, create volumes, and so on. The class name must be the same as the source system. See "PRIMECLUSTER Global File Services Configuration and Administration Guide" for instructions.
Preliminary Setup for Gds Resources used in RMS
Perform the following operation on any node.
```
# /opt/SMAW/SMAWRrms/bin/hvgdsetup -a Class1
```
Restoring Volume Data
Restore the data you backed up in "K.4.3 Copying Disk Data" to the volume created in step 2.