I frequently expand drives on my VMs. How can I rescan the drives without rebooting the server?


The easiest solution is to use scsitools script rescan-scsi-bus.

sudo apt-get install scsitools
sudo rescan-scsi-bus

To do it without installing a utility on 14.04:

echo '1' > /sys/class/scsi_disk/0\:0\:0\:0/device/rescan

IMPORTANT: Be sure to replace the 0:0:0:0 with the appropriate disk for your purposes.

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