ntfsusermap for triple boot

Minh Nghĩa

4/22/23, 6:47 AM

I have a triple boot system: macOS, Windows (Fast Boot disabled), and Xubuntu. Beside the OS drive, there's a data drive formatted in NTFS.

I use ntfsusermap as mentioned in osxfuse's NTFS-3G guide to write to the drive on macOS. However, I can't write normally under Xubuntu anymore. For example:

touch new_file does create new_file, but it complains setting times of 'new_file': Permission denied.
rm new_file complains remove write-protected regular empty file 'new_file'. rm -f works.

I think this ntfsusermap is the problem, I've never touched the permission on Windows. What can I do to fix or at least debug this?

Update: getacl on the drive gives me this:

# file: .
# owner: root
# group: dialout
user::rwx
group::rwx
other::rwx

And on any file, folder inside:

# file: xxx
# owner: 501
# group: dialout
user::rwx
group::rwx
other::rwx

Update 2: My fstab line, I just copy the line in this answer:

UUID=xxxx /media/DATA ntfs rw,auto,users,exec,nls=utf8,umask=003,gid=46,uid=1000    0   0

0 + 0

permissions

ntfs

user-management

ntfs-3g

Johan Palych

4/22/23, 7:22 AM

Permissions on a Linux system are normally set to 755 for folders and 644 for files. It is recommended to keep these permissions in use for the NTFS partition as well if you use the partition on a regular basis. The following example assigns the above permissions to a normal user: /dev/NTFS-partition /mnt/windows ntfs-3g uid=userid,gid=groupid,dmask=022,fmask=133 0 0

Johan Palych

4/22/23, 10:48 AM

Standard linux driver(in the terminal: sudo modinfo ntfs) does not know how to write to NTFS volumes! If you want to read-write, then use NTFS-3G(sudo apt-get install ntfs-3g). Xubuntu has NTFS-3G and FUSE installed by default. Thunar with user rights mounts and unmounts ntfs partitions. For automounting sudo su in the terminal:lsblk -o NAME,FSTYPE,LABEL,SIZE,MOUNTPOINT,UUID next mousepad /etc/fstab and add UUID=(UUID partition) /media/user/(UUID or LABEL) ntfs-3g defaults,noatime,nodev,nosuid,locale=(in the terminal locale) 0 0

Minh Nghĩa

4/27/23, 8:30 AM

Thanks for your tips. After 1 more days of searching, I can confirm that everything works normally in Thunar, just not in terminal (Kitty in my case). NTFS-3G is installed by default. I think I have to dig deep to understand what `ntfsusermap` does.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: ntfsusermap for triple boot

TH: ntfsusermap สำหรับการบูตแบบสามเท่า

RO: ntfsusermap pentru încărcare triplă

RU: ntfsusermap для тройной загрузки

VI: ntfsusermap để khởi động ba lần

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