Raw copy sd card only after reboot

Setup, Configuration and Use Beginners
1

i am using openhabian option 54 to take raw copy of my internal card.If my system is running and i insert the usb card reader with exactly same sd card as my internal one and start option 54 i get :

Taking a raw partition copy, be prepared this may take long such as 20-30 minutes for a 16 GB SD card
FAILED (set random UUID)
mount: /storage/syncmount: wrong fs type, bad option, bad superblock on /dev/sda2, missing codepage or helper program, or other error.
sed: can't read /storage/syncmount/etc/fstab: No such file or directory
umount: /storage/syncmount: not mounted.
OK (dirty bit on fsck /dev/sda2 is normal)

if i do a sudo reboot ,after reboot the copy with option 54 work ok :

Taking a raw partition copy, be prepared this may take long such as 20-30 minutes for a 16 GB SD card
OK

what seems to be the problem?

2

bump to my question…may @mstormi can help?

3

Please do not ping people neither me nor others.

Seems you have configured the remaining space of your external card as storage.
If you don’t have any card in there it cannot be mounted for obvious reasons.

4

I am very sorry I didn’t mean to be rude mate.

No I don’t have configured the remaining space of my external card as storage.It is exactly the same card as my internal.After restart I can take a raw copy alright ,but I don’t want to restart my system every time I want to backup.

5

your external card may be bad, try a different one
enable debugmode=maximum before you run 54 again to see what’s failing.