IBM has seen issues with SVC, Storwize V7000 and Storwize V7000 Unified during activities which result in path failover whereby paths are slandered by the Linux operating system when running with Qlogic 8.01.07 or higher and Emulex 8.16.34 or higher.
Should this situation occur with SVC, Storwize V7000 and Storwize V7000 Unified then manually resetting the paths to an online state will resolve the issue.
To bring the paths back on line manually, check the file named 'model' in all /sys/class/scsi_device/<device dir>/device directories. If 'model' contains 2145 then:
check the file named 'online' in the same directory:
if it contains "0" then the relative path has been slandered so change to "1" by running:
echo 1 > /sys/class/scsi_device/<device dir>/device/online
for Red Hat
check the file named 'state' in the same directory:
if it contains "offline" then change to "running" by
echo "running" > /sys/class/scsi_device/<device dir>/device/state
These issues have been resolved in later levels of Linux ie SLES11SP1 and RHEL6.1 when running in combination with the latest drivers.
17 June 2018