Score:1

mount overlay fs gives error device /cow does not exist

ws flag

I am running kubuntu 20.04. Looking with mount, with /proc/mounts, and with df shows that the system had used this command:

mount -t overlay /cow / -o lowerdir=/filesystem.squashfs,upperdir=/cow/upper,workdir=/cow/work

1.

if I use this command does not work, but error occurs:

special device "/cow" does not exist.

2.

indeed, "/cow" is not in dir /dev, and is nowhere in the directory tree.

3.

and the arguments to lowerdir, to upperdir, to workdir cannot be found in the dirtree or elswhere in the system.

/filesysten.squashfs can be found, but with any trials with overlay fs it is not accepted.

thus all the advices in internet regarding overlay fs cannot be applied.

Regards Anton

guiverc avatar
cn flag
Are you using an installed system? or a *live* system (where *copy-on-write* is expected)?
Anton Wessel avatar
ws flag
I am runnung kubuntu 20.04 from a bough USB stick as live OS.
Anton Wessel avatar
ws flag
The USB stick has 32 GB capacity, but for the overlayfs only a small part of the 32 GB is avaiable.
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