Refresh /dev/sdx list
Solution 1:
Use the command:
rescan-scsi-bus.sh --remove --issue-lip
to have this nice and tidy script handle the work for you.
Solution 2:
Try the following:
echo "- - -" > /sys/class/scsi_host/host0/scan
For the last command check which scsi controller you are using, host0 , host1 etc.