Refresh /dev/sdx list

Question

I've been messing around with my storage array (in that case 2xMD3000 SAS) and between the scans/rescans/delete/add my /dev/sdx block devices are all messed up. Some of them are non existent and using fdisk on them gives:

fdisk: unable to open sdc: No such device or address

It's not a real problem as I'm using /dev/disk/by-id/wwn-xxxxx anyway, but I would like to know if there is a way to trigger the kernel into updating/removing those empty and broken devices somehow. Thanks

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.

Comments

[Martino Dino]

Thanks for that :) Didn't know such script was on my system