start > Ubuntu > 20 LTS > Scan For Newly Added Disk
(2023-09-05)
Force a rescan of the appropriate host:
Check to make sure the new disk got detected:
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Source)
Problem
I've added a new disk to my Ubuntu 20 LTS VM and it isn't showing up without a reboot.Solution
Find the SCSI host holding your disk:root@radio2:~# ls -l /sys/class/scsi_device/*/device/block '/sys/class/scsi_device/32:0:0:0/device/block': total 0 drwxr-xr-x 12 root root 0 Jan 11 12:44 sda'/sys/class/scsi_device/32:0:1:0/device/block': total 0 drwxr-xr-x 10 root root 0 Jan 11 12:44 sdb
root@radio2:~# echo "- - -" > /sys/class/scsi_host/host32/scan
root@radio2:~# ls -l /sys/class/scsi_device/*/device/block '/sys/class/scsi_device/32:0:0:0/device/block': total 0 drwxr-xr-x 12 root root 0 Jan 11 12:44 sda'/sys/class/scsi_device/32:0:1:0/device/block': total 0 drwxr-xr-x 10 root root 0 Jan 11 12:44 sdb'/sys/class/scsi_device/32:0:2:0/device/block': total 0 drwxr-xr-x 9 root root 0 Jan 11 13:10 sdc
Brute Force
Probe all SCSI hosts in the VM:# echo "- - -" | tee /sys/class/scsi_host/host*/scan # dmesg | grep sd
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