[SOLVED] How to make USB writable ?

[kblknight]

Hi Everbody,

im configured an external USB as my backup source and i have the following error:

ERROR: Backup of VM 100 failed - unable to create temporary directory '/mnt/usb/dump/vzdump-qemu-100-2022_01_11-09_41_07.tmp' at /usr/share/perl5/PVE/VZDump.pm line 837.

i tried to change the '/mnt/usb/dump/' permission using ( chmod77 /mnt/usb/dump/ ) but i get the following error.
chmod: changing permissions of '/mnt/usb/dump/' : Read-only file system.

i would be happy to hear from you guys.

Thanks.

 

[aaron]

How do you mount the USB disk? What file system is it formatted with?

You can check with the mount command to see if it is mounted writable (rw) or not.

 

[kblknight]

How do you mount the USB disk? What file system is it formatted with?

You can check with the mount command to see if it is mounted writable (rw) or not.

Thanks for your Reply AAron.

mkdir /mnt/usb
mount /dev/sdb /mnt/USB

and the external HDD is with exfat formatet.

regards

 

[aaron]

What is the output of the mount command?

To limit it to just the disk we are interested in, you can run

mount | grep "/mnt/usb"

 

[kblknight]

What is the output of the mount command?

To limit it to just the disk we are interested in, you can run

mount | grep "/mnt/usb"

/dev/sdb on /mnt/usb type exfat (rw,relatime,fmask=0022,dmask=0022,iocharset=utf8,errors=remount-ro)

 

[aaron]

Is it possible that at some point there was some hiccup or error and the disk got remounted as read only? I would try to manually unmount and mounting it again and checking right after that if the chmod works.

 

[kblknight]

Is it possible that at some point there was some hiccup or error and the disk got remounted as read only? I would try to manually unmount and mounting it again and checking right after that if the chmod works.

hey Aaron,

thanks for replying.

yesterday what i did was just mount -a and it started working, it was strange but it works