8.6.2 Points of Concern for Installation

When registering the ETERNUS disk controlled by standard multipath software (MPxIO) of OS to the GDS class and setting the I/O Response Time Assurance Function to the class, Mulitpath Diagnostic Program is necessary.
Mulitpath Diagnostic Program can be installed by installing Enhanced Support Facility 5.1or later. After installation, change the automatic restoration time.
1. If Enhanced Support Facility 5.1 or later is not installed, install it.
For procedures on how to install, see the installation guide of Enhanced Support Facility 5.1 or later.
2. Change the automatic restoration time of Multipath Diagnostic Program.
Describe the following to the /var/opt/FJSVpdiag/fjsvpdiag.conf file.
enable_interval=3600;
3. Set the Multipath Diagnostic Program to automatically activate when the server is started.
```
# /opt/FJSVpdiag/bin/fjsvpdiagbootset.sh
```
4. Activate Mulitpath Diagnostic Program.
```
# /opt/FJSVpdiag/etc/S99pdiag
```
When registering the ETERNUS disk controlled by ETERNUS Mulitpath Driver 3.1.0 or later to the GDS class and setting the I/O Response Time Assurance Function to the class, apply the patch T011535SP-04 or later and execute the following command to set to reduce the timeout time.
1. Execute iotimeoutset command.
```
# /opt/FJSVmplb/bin/iotimeoutset
```
Note) For installing the FJSVmplb package to the directory other than /opt, replace the /opt of the directory in installation destination and execute.
2. Check whether the following definition has been added to /kernel/drv/mplb.conf.
```
# vi /kernel/drv/mplb.conf
...
mplb-io-watch=1;
```
3. Restart the system to enable the settings.
```
# /usr/sbin/shutdown -y -g0 -i6
```