When using the shared disk device, you need to install and set up the software product.
Installation and Setup of Related Software
Install and set up the software products (ETERNUS Multipath driver) required for using the shared disk device. For details on the installation and setup procedure, see the "Software Information" for ETERNUS Multipath Driver.
Note
For immediate cluster failover if an I/O device where the system volume is placed fails
In the default setting of the ext3 file system, even if an I/O device where the system volume is placed fails, a cluster failover does not occur and the system operation may continue based on the data stored on the memory.
If you want PRIMECLUSTER to trigger a cluster failover immediately in the event that an I/O device where the system volume is placed fails, perform the following setting:
For each partition included in the system volume, specify "errors=panic" to the mount option of ext3.
Example: To set it in /etc/fstab (when /, /var, and /home exist in one system volume)
LABEL=/ / ext3 errors=panic 1 1 LABEL=/boot /boot ext3 errors=panic 1 2 LABEL=/var /var ext3 errors=panic 1 3 LABEL=/home /home ext3 errors=panic 1 4
However, an immediate cluster failover may not become available due to taking time for an I/O error to reach theext3 file system. The regularly writing to the system volume enhances the detection frequency of I/O error.
