how do I change usb device permissions?

English Hardware
#1

oS v13.1_x64 - KDE. I have an external usb HD originally formatted FAT32. I want to change it to ext4 and am part way there. My hang up is permissions.

This device (sdf1) originally mounted to /var/run/media/$User/LabelName

As root I did

mkfs -t ext4 /dev/sdf1

I then used YaST partition manager to edit the partition and gave it a name and mounting point same as above.
While this works fine logged in a root it has other problems that I need to resolve.

Ordinarily, these devices auto mount and are r/w by the user. And they can be ejected. And they have no entry in fstab.

The YaST partitioner required me to enter a mounting point and it entered that info into fstab.
And upon ejection it want my root authenication. I presume this is due to being logged in as $user.
Is there some kind of MBR entry that determines how these devices autoload? Or

From my mount cmd:

/dev/sdf1 on /var/run/media/jon/Seagate1Tb type ext4 (rw,relatime,data=ordered)

A FAT32 device mounted shows this and has no entry in fstab:

/dev/sdg1 on /run/media/jon/Seagate15tb type vfat (rw,nosuid,nodev,relatime,uid=1000,gid=100,fmask=0022,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks2)

So I can see that the fat32 device knows it was mounted with my own userID.

fdisk shows the following for my HD, the problem USB device, and the FAT32 USB device:

fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes, 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xf44763df

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1              63       80324       40131   16  Hidden FAT16
/dev/sda2   *       81920  1953523711   976720896    f  W95 Ext'd (LBA)
/dev/sda5           83968    16883711     8399872   82  Linux swap / Solaris
/dev/sda6        16885760    58830847    20972544   83  Linux
/dev/sda7        58832896  1953503231   947335168   83  Linux

Disk /dev/sdf: 1000.2 GB, 1000204885504 bytes, 1953525167 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000d4543

   Device Boot      Start         End      Blocks   Id  System
/dev/sdf1            2048  1953521663   976759808   83  Linux

Disk /dev/sdg: 1500.3 GB, 1500301909504 bytes, 2930277167 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xb185db18

   Device Boot      Start         End      Blocks   Id  System
/dev/sdg1              63  2930272064  1465136001    c  W95 FAT32 (LBA)

What can I do to fix this problem?
Jon

#2

On Wed 27 Nov 2013 02:16:02 AM CST, 6520302 wrote:

oS v13.1_x64 - KDE. I have an external usb HD originally formatted
FAT32. I want to change it to ext4 and am part way there. My hang up
is permissions.

This device (sdf1) originally mounted to /var/run/media/$User/LabelName

<snip>

What can I do to fix this problem?
Jon

Hi
You don’t need a mount point, just format and add a disk label. I
normally create a top directory and give my user ownership via chown.
Then just let the automount do it’s thing.

–
Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
SLED 11 SP3 (x86_64) GNOME 2.28.0 Kernel 3.0.101-0.8-default
If you find this post helpful and are logged into the web interface,
please show your appreciation and click on the star below… Thanks!

#3

Malcolm:

Thanks, using chown allows me to get what I expected and the usb hd automounts and ejects properly.

The mount point is still in fstab.

I was looking at parted but that doesn’t seem to format ext4. Or can I just remove the fstab entry and expect the same results w/o doing another format?

Jon

#4

On Wed 27 Nov 2013 03:36:01 AM CST, 6520302 wrote:

malcolmlewis;2602485 Wrote:
> Hi
> You don’t need a mount point, just format and add a disk label. I
> normally create a top directory and give my user ownership via chown.
> Then just let the automount do it’s thing.
>

Malcolm:

Thanks, using chown allows me to get what I expected and the usb hd
automounts and ejects properly.

The mount point is still in fstab.

I was looking at parted but that doesn’t seem to format ext4. Or can I
just remove the fstab entry and expect the same results w/o doing
another format?

Jon

Hi
You should expect the same result removing the fstab entry, as long as
you have set the label, it should mount under the media directory

–
Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
SLED 11 SP3 (x86_64) GNOME 2.28.0 Kernel 3.0.101-0.8-default
If you find this post helpful and are logged into the web interface,
please show your appreciation and click on the star below… Thanks!

#5

Malcolm:

That seems to take care of it.
THANKS,
jon