How do I rescan drives I've expanded?
By Daniel Rodriguez •
I frequently expand drives on my VMs. How can I rescan the drives without rebooting the server?
2 Answers
The easiest solution is to use scsitools script rescan-scsi-bus.
sudo apt-get install scsitools
sudo rescan-scsi-busTo do it without installing a utility on 14.04:
echo '1' > /sys/class/scsi_disk/0\:0\:0\:0/device/rescanIMPORTANT: Be sure to replace the 0:0:0:0 with the appropriate disk for your purposes.
Example for system disk without reboot:
Rescan the bus for the new size:
# echo 1 > /sys/block/sda/device/rescanExpand your partition (works with ansible):
# parted ---pretend-input-tty /dev/sda resizepart F 2 Yes 100% - F for Fix - 2 for partition - Yes to confirm - 100% for whole partitionResize it:
# resize2fs /dev/sda2
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