Dell PowerFlex Manager 4.6.x CLI Reference Guide

Run the SDC driver on Red Hat Enterprise Linux or SUSE Enterprise Linux Enterprise Server with multipath enabled

Run the SDC driver on Red Hat Enterprise Linux or SUSE Enterprise Linux Enterprise Server with multipath enabled

1. On the machine where the SDC is running, open /etc/udev/rules.d/20-scini.rules for editing.
2. In the first line at the end add:

   ENV{ID_WWN}="%c"

   The line should read like this:

   KERNEL=="scini*[!0-9]", SUBSYSTEM=="block", PROGRAM="/bin/emc/scaleio/drv_cfg --query_block_device_id --block_device $tempnode", SYMLINK+="disk/by-id/emc-vol-%c", ENV{ID_BUS}="scsi", ENV{ID_SERIAL}="%c", ENV{ID_WWN}="%c"

3. Open /etc/multipath.conf and add the following additional settings to the configuration file:

   defaults {
     		retain_attached_hw_handler "no"
   				find_multipaths no
   }

   blacklist_exceptions {
   					devnode "scini"
   }

   NOTE:From the command line, run dracut -f. This includes the changes in initrd. [retain_attached_hw_handler no] is the default setting in Red Hat Enterprise Linux 7.x or 8.x.
4. Restart the PowerFlex service and multipathd service:

   systemctl restart scini

   systemctl restart multipathd.service

   NOTE:If LUNs are in use and a restart is not possible, restart the node.