Rescan scsi
From Attie's Wiki
This will rescan all SCSI LUNs. Useful after hotplugging.
Run as root:
for host in /sys/class/scsi_host/host*; do echo "- - -" > $host/scan; echo $host/scan; done
Rescan Disk
Helps to get the updated size...
Run as root:
echo 1 > /sys/block/sdX/device/rescan