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Boorhin
Asked: 2017-08-25 03:01:53 +0800 CST

Cannot be owner of newly formated ext4 drive

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I have read quite a few tips and tricks here and there on this forum. However, I cannot find any clean way of solving this problem. I had an old 1.5tb drive that was in a e-SATA box that I plugged in my computer on my Ubuntu 16.04. Struggled a bit to get the partition on it, succeeded and now have mounted my drive on: /mnt/3b42e9ce-1972-498b-9b96-13199979c333

This is my setup:

sudo fdisk -l
Disk /dev/sda: 1.4 TiB, 1500301910016 bytes, 2930277168 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
Disklabel type: dos
Disk identifier: 0x06dd1f4e

Device     Boot Start        End    Sectors  Size Id Type
/dev/sda1        2048 2930276351 2930274304  1.4T 83 Linux


Disk /dev/sdb: 279.4 GiB, 300000000000 bytes, 585937500 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
Disklabel type: dos
Disk identifier: 0x129228a1

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sdb1              52     65675     65624    32M de Dell Utility
/dev/sdb2  *        67584  27645951  27578368  13.2G  7 HPFS/NTFS/exFAT
/dev/sdb4        27645952 585936895 558290944 266.2G  5 Extended
/dev/sdb5        27648000  35459071   7811072   3.7G 82 Linux swap / Solaris
/dev/sdb6        35461120 113584127  78123008  37.3G 83 Linux
/dev/sdb7       113586176 585936895 472350720 225.2G 83 Linux

so sda 1 is my problem. I have tried this trick:

sudo chgrp USER /mnt/3b42e9ce-1972-498b-9b96-13199979c333
sudo chmod g+w /mnt/3b42e9ce-1972-498b-9b96-13199979c333

But this is not solving my problem my softwares cannot write on the disk. Not sure if I can really execute something on it. And this does not last after reboot and remounting. I have this message:

sudo chgrp USER /mnt/3b42e9ce-1972-498b-9b96-13199979c333
chgrp: changing group of '/mnt/3b42e9ce-1972-498b-9b96-13199979c333': Read-only file system

I also have tried to remount with writing permission but this did not work at all.

sudo mount -o remount,rw /dev/sda1

or

sudo mount -o remount, uid=1000, gid=1000, rw /dev/sda1

The latest syntax is not understood by the system at all although you will find it in different forums. My software is in my home directory so should have the same rights as me.

What is most surprising me is that I lost the rights without having rebooted... While working on my software which was struggling since it could not write (I discovered lately the origin of the error)

Any help welcome

partitioning

1 Answers

  1. Best Answer

    I usually mount all my non OS drives into /media. So you could mount your drive in /media/mydrive/ (change mydrive to anything you like).

    sudo mkdir /media/mydrive

    Get the UUID of your drive

    sudo blkid

    Make an entry in your fstab to mount your drive to /media/mydrive

    sudo nano /etc/fstab

    Add the entry, something like this

    UUID=<the UUID from blkid>   /media/mydrive    ext4    errors=remount-ro    0   2

    Take ownership of the mount point

    sudo chown -R yourusername.yourusername /media/mydrive

sudo chmod +r /media/mydrive

    Reboot

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