[SOVED] USB drive is always mounted read only

[jody]

When i plug in an usb drive, it is automatically mounted to /mnt/usb1, but with read access only:

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ls -l /mnt
total 4
dr-x------ 1 root root 4096 Oct  3 08:29 usb1

The mount command returns

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/dev/sdc1 on /home/jody/ttt type ntfs (ro,relatime,uid=0,gid=0,fmask=0177,dmask=077,nls=utf8,errors=continue,mft_zone_multiplier=1)

I tried to mount it manually with specify9ing read/write access:

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sudo mount -o rw /dev/sdc1 ~/usb

.
No error was returned but the drive was again only read-accessible by root.

It is not possible to change anything woth chmod or chown.

How can i mount an usb drive that is readable and writeable?

[mike155]

Please take a look at the output of demsg and at your system log / journal. There are probably messages which explain what's going on.

It seems to be a NTFS partition. Was the drive last mounted under Windows? Google search reveals several posts that indicate that NTFS partitions are mounted read-only under Linux if they were not safely removed under Windows or if Windows was not shut down in full mode (Shift key).

You could also try the "ntfs3" and "ntfs-3g" filesystems.

[jody]

dmesg indeed says

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[6680603.125549] ntfs: (device sdc1): load_system_files(): Volume is dirty.  Mounting read-only.  Run chkdsk and mount in Windows.

But i seem to have no chkdsk on my machine.

I mounted in it on a Windows system and ran quick format. Strangely enough the drive was not identified as removable - the context-sensitive menu for it showed no"eject" or "safely remove" or any such.
So i shut down the Windows computer and unplugged the drive. When i plugged into my gentoo ystem it was again mounted read only.
The entry in dmesg differs, though:

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[6683223.232398] ntfs: (device sdc1): load_system_files(): $LogFile is not clean.  Mounting read-only.  Mount in Windows.

Regarding the other filesystem i seem to have neither of them:

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jody@aim-frog ~ $ sudo mount -t ntfs3 /dev/sdc1 ~/ttt 
mount: /home/jody/ttt: unknown filesystem type 'ntfs3'.
jody@aim-frog ~ $ sudo mount -t ntfs3-g /dev/sdc1 ~/ttt 
mount: /home/jody/ttt: unknown filesystem type 'ntfs3-g'.

seem to have

[mike155]

Please redo the test, but perform a full shutdown under Windows. See: https://www.howtogeek.com/349114/shutti ... g-it-does/.

For ntfs-3g, FUSE must be enabled in your kernel and package sys-fs/ntfs3g must be installed.

For ntfs, the kernel options below must be enabled in your kernel:

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File systems > DOS/FAT/EXFAT/NT Filesystems

    [*] NTFS file system support
    [ ]   NTFS debugging support (NEW)
    [*]   NTFS write support (NEW)

For ntfs3, the kernel options below must be enabled in your kernel:

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File systems > DOS/FAT/EXFAT/NT Filesystems

    [*] NTFS Read-Write file system support
    [ ]   64 bits per NTFS clusters (NEW)
    [ ]   activate support of external compressions lzx/xpress (NEW)
    [ ]   NTFS POSIX Access Control Lists (NEW)

[jody]

I mounted the usb drive to my windows laptop, did a quick format, then did "restart", and unplugged the drive just at the beginning of the boot sequence.

Plugged it in to my gentoo computer it was now mounted rw:

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/dev/sdc1 on /mnt/usb1 type ntfs (rw,nodev,noexec,noatime,sync,dirsync,uid=0,gid=0,fmask=0177,dmask=077,nls=utf8,errors=continue,mft_zone_multiplier=1)

with access rights 700. I changed this to 744, but still it seems to impossible to write to the disk:

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jody@aim-frog ~ $ sudo touch /mnt/usb1/test1.txt
touch: cannot touch '/mnt/usb1/test1.txt': Permission denied

However after i emerged sys-fs/ntfs3g, i did

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sudo mount -t ntfs-3g /dev/sdc1 /home/jody/tt

and now the access rights are

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drwxrwxrwx  1 root root         4096 Nov 23 09:19  ttt

and i can actually write to the drive.
Thanks!