USB mounts only with root permissions

[gnomek]

I formated USB to ext4 and relabeled it. Now it mounts only with root permissions

mount
/dev/sdb1 on /media/adata type ext4 (rw,nosuid,nodev,uhelper=udisks)
/media$ ls -l
drwxr-xr-x  3 root    root   4096 sty  4 18:41 adata

As comparison, other USB with Fat32 mounts with "normal" permissions and I can manage files without problems on different users accounts.

drwx------ 14 gnomek  gnomek 32768 sty  4 19:36 KINGSTON

/dev/sdb1 on /media/KINGSTON type vfat (rw,nosuid,nodev,uid=1000,gid=1000,shortname=mixed,dmask=0077,utf8=1,showexec,flush,uhelper=udisks)

What can I do about it?

[oshunluvr]

You don't say which version of Kubuntu you're using or how you're mounting the sticks.

What I see here (13.04) is; if I mount the USB stick manually, I get your results. If I use the Device manager and click on "open with Dolphin" I get user permissions on the device.

Likely, this is because FAT32 doesn't support user permissions, so the defaults to the user. Since super user rights are required to mount a device, when you mount it manually, it defaults to root when the file system supports it. The device manager sets the permissions to user for you.

You can either mount it using the dolphin action or edit the udev rules to set USB devices to a user id.

Slightly off-topic: Why use ext4 for a stick? IMO, you don't need journaling on a device that small. You'll get better performance and more space from ext2.

[vinnywright]

the extX file systems use linux/unix permissions , vfat dose not , you were root/sudo when making the ext4 file system so it took root permission .

open a root dolphin (kdesudo dolphin) and change it .

VINNY

[SteveRiley]

You also have to change permissions on the mount point.

chmod -R 777 /media/adata

EXT4 will still set the user ID and group ID of the who/whatever creates files, and (in most cases) the permissions on those files will be 644.

I'd encourage you not to use EXT4 for a USB drive. The purpose of an external drive is to be portable from machine to machine; using a filesystem that always assigns permissions and owners rather defeats this purpose. Furthermore, EXT4's journaling process will cause more writes to the drive and take up space. Stick with FAT-32.

[vinnywright]

You also have to change permissions on the mount point.

chmod -R 777 /media/adata

EXT4 will still set the user ID and group ID of the who/whatever creates files, and (in most cases) the permissions on those files will be 644.

I'd encourage you not to use EXT4 for a USB drive. The purpose of an external drive is to be portable from machine to machine; using a filesystem that always assigns permissions and owners rather defeats this purpose. Furthermore, EXT4's journaling process will cause more writes to the drive and take up space. Stick with FAT-32.

oops ,,,yup +1

VINNY

[gnomek]

Thank you for help. Problem solved. I am aware that fat32 would be a better choice but I did it intentionally, for special purpose.