On Thu, 28 Mar 2019 00:56:36 +0000, Martin Gregorie wrote:

> On Wed, 27 Mar 2019 19:46:42 +0000, Richard Kettlewell wrote:
>
>> Does it not work?
>>
>
No, it does not.

The manual says that labels can be used equivalently to /dev/sdn or UUIDs,
but while

usb_label="USB_SNAPSHOT"
usb_disk="/media/snapshot"
sudo mount -t ext4 -L "$usb_label" "$usb_disk"

works correctly

sudo fsck -n $usb_label

outputs an "Emergency help:" message listing the fsck options etc and

sudo fsck.ext4 -n $usb_label

outputs the error

e2fsck 1.44.2 (14-May-2018)
fsck.ext4: No such file or directory while trying to open USB_SNAPSHOT
Possibly non-existent device?

I've opened a bug report and in the meanwhile am using

readlink -e $usb_label

to get the device name.


--
Martin    | martin at
Gregorie  | gregorie dot org

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