Configuring Red Hat Enterprise Linux 6 series and Red Hat Enterprise Linux 7 series to support Veritas Storage Foundation

If you are using Red Hat Enterprise Linux 6 series or Red Hat Enterprise Linux 7 series, you must configure it to support Veritas Storage Foundation.

1. Log in to the host as the root user.
2. Create the file /etc/udev/rules.d/40-rport.rules with the following content line: KERNEL=="rport-*", SUBSYSTEM=="fc_remote_ports", ACTION=="add", RUN+="/bin/sh -c 'echo 20 > /sys/class/fc_remote_ports/%k/fast_io_fail_tmo;echo 864000 > /sys/class/fc_remote_ports/%k/dev_loss_tmo'"
3. Check the value of the IOFENCE timeout parameter and ensure that it is set to 30000.
   The IOFENCE timeout parameter specifies the amount of time in milliseconds that it takes clients to respond to an IOFENCE message before the system halts. When clients receive an IOFENCE message, they must unregister from the GAB driver within the number of milliseconds specified by the IOFENCE timeout parameter, or the system halts. The default value for this parameter is 15000 milliseconds or 15 seconds.
   Example
   To check the value of this parameter, enter the command gabconfig -l on the host. The following is an example of the type of output this command produces:

   # gabconfig -l
   GAB Driver Configuration
   Driver state         : Configured
   Partition arbitration: Disabled
   Control port seed    : Enabled
   Halt on process death: Disabled
   Missed heartbeat halt: Disabled
   Halt on rejoin       : Disabled
   Keep on killing      : Disabled
   Quorum flag          : Disabled
   Restart              : Enabled
   Node count           : 2 
   Send queue limit     : 128
   Recv queue limit     : 128
   IOFENCE timeout (ms) : 15000
   Stable timeout (ms)  : 5000
   

4. If the value of the IOFENCE timeout parameter is not 30000, correct it: gabconfig -f 30000
   This value is not persistent across reboots, so you must check it each time you boot the host and reset it if necessary.