Question

55

Mount USB drive with write permissions for everyone or specific user

rated 0 times [ 55] [ 0] / answers: 1 / hits: 320436 / 1 Year ago, sun, january 1, 2023, 4:20:18

I know there are similar questions but I get some specific problem I can't overcome.

I have:

HDD split into two partitions. /dev/sdb1 and /dev/sdb2. sdb1 is NTFS and I don't need it. I need sdb2 which is fat32.

Ubuntu 12.04.1 LTS (server)

I want:

Ultimately I need a perma-mount /dev/sdb2 to /home/storage with access right (rw) for the user media.

Problems I'm facing:

Using manual mount from command line.

If I just use

server# sudo mount /dev/sdb2 /home/storage

It mounts but the /home/storage receives root as owner and group and doesn't allow media user to write there.

If I use mount command without sudo as the user media - i'm not allowed. Says only root can use mount.

If I use mount with options: server# sudo mount /dev/sdb2 /home/storage -o umask=000 I get what I need. A bit overdone of course, since the storage folder becomes writable for everyone. BUT - that is manually mounted - now i need it to remount on every reboot.

Remounting on reboot - using fstab**

So I thought I'll be fine if I use fstab to mount this partition (/dev/sdb2) every time i reboot. The fstab line I added:

UUID=8C52-C1CD /home/storage auto   user,umask=000,utf8,noauto  0   0

Got uuid with blkid. The fs type auto I changed a few times... I tried vfat too, but always on the reboot Ubuntu stops when processing fstab (I think) with the message (took from the log):

fsck from util-linux 2.20.1

/dev/sda5: clean, 120559/10969088 files, 19960144/43861504 blocks

mount: unknown filesystem type 'static'

mountall: mount /etc/fstab: [772] terminated with status 32

mountall: Filesystem could not be mounted: /etc/fstab:

Skipping /etc/fstab: at user request

And also - sudo mount -a never really does anything.

What am I doing wrong? I do suspect I messed up something:)

It seems fstab should hold only mounts for static drives, not any sort of usb stuff. I'm puzzled how then this works with all the people posting on the net their success stories...

However... if this is not possible - I would like to know how to remount my USB after every reboot... if not with fstab - then how? :)

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

urvedcaly

Add To Favorites

Follow

Total Points: 171

Total Questions: 118

Total Answers: 124

Location: Cape Verde

Member since Fri, Nov 27, 2020

3 Years ago

answered 1 Year ago terneive · Accepted Answer

Your problem seems to be about the permissions you have set. FAT / FAT32 formatted drives don't support file permissions. The permissions for everything are determined by how the drive is mounted. When you set the permission open it worked when you

server# sudo mount /dev/sdb2 /home/storage -o umask=000

As for it not auto mounting on reboot

UUID=8C52-C1CD /home/storage auto user,umask=000,utf8, -->noauto<-- 0 0

The "noauto" makes this NOT automatically mount when the system starts and parses the /etc/fstab file. Remove that option and it will mount on startup. You can set the permissions on the mount point once it's mounted with chmod or specify them in /etc/fstab.

If you need the media user to access it, you can set the permissions to 764, and add them to the security group. Root always has access to everything.

see http://www.linux.org/threads/file-permissions-chmod.4094/ for some examples of propper file permissions

On a side note, bodhi.zazen made a good point
Is there some reason you need to use FAT ? If not, I would back up the data and use a linux native file system. You can then set ownership and permissions.