[Solved] fstab bug: ntfs partition showing as mounted even though it's not actually mounted

[stu4ben]

Hey, I have encountered a bug with my fstab file, after startup the partition is displayed as mounted, even though it's not really mounted. I'm not able to load any data of it over the mountpoint. Also I'm unable to unmount it. However if i comment out the line for the partition in question (sda2 / UUID=0230B6A130B69ADD), and restart the computer, and remove the comment # again, and manually mount the drive by clicking it in the file manager and Devices, it works as intended. The ext4 partition on the same drive mounts as intended.
I also have the same problem with nvme0n1p4, which is however not in the fstab file right now.
My /etc/fstab file content:

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# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system>                           <mount point>           <type>  <options>                                <dump>  <pass>
# / was on /dev/sda2 during installation
UUID=6276e2f4-1892-4fe1-ab15-9c2e1c36e009 /                       ext4    errors=remount-ro                        0       1
# /boot/efi was on /dev/sda1 during installation
UUID=BA61-700F                            /boot/efi               vfat    umask=0077                               0       1
# /home was on /dev/sda3 during installation
UUID=8aa6b543-95dc-40f0-b5b8-3af2b956f418 /home                   ext4    defaults                                 0       2
# swap was on /dev/sda4 during installation
UUID=df6044f1-c30c-4205-bb55-925a719c8416 none                    swap    sw                                       0       0
# Backup Partition on 8TB HDD 
UUID=b1aa50c5-2ef5-4e58-b619-735ab9d64a91 /backup                 ext4    defaults                                 0       2
# Bulk Data Partition on 8TB HDD
UUID=0230B6A130B69ADD                     /home/stu4ben/DATA      ntfs    rw,user,exec,umask=002,uid=stu4ben       0       2

My console commands:

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stu4ben@stu4ben-linux-mint-pc:~$ lsblk
NAME 		   MAJ:MIN 	RM 	SIZE 	RO 	TYPE 	MOUNTPOINT
sda           		8:0    	0  	7.3T  	0 	disk 
├─sda1      		8:1    	0    	16M  	0 	part 
├─sda2     	   	8:2    	0   	6.7T  	0 	part 	/home/stu4ben/DATA
└─sda3     	  	8:3    	0 	616.1G 	0 	part 	/run/timeshift/backup
sdb           		8:16   	0 	238.5G	0 	disk 
├─sdb1      	  	8:17   	0   	512M  	0 	part 	/boot/efi
├─sdb2        		8:18   	0  	62.5G  	0 	part 	/
├─sdb3      	  	8:19   	0 	117.2G 	0 	part 	/home
└─sdb4      	  	8:20   	0  	31.3G  	0 	part 	[SWAP]
nvme0n1 		259:0 	0 	465.8G 	0 	disk 
├─nvme0n1p1 		259:1 	0   	529M 	0 	part 
├─nvme0n1p2 		259:2 	0   	100M  	0 	part 
├─nvme0n1p3 		259:3 	0    	16M  	0 	part 
└─nvme0n1p4 		259:4 	0 	465.1G 	0 	part 
stu4ben@stu4ben-linux-mint-pc:~$ sudo umount /dev/sda2
umount: /home/stu4ben/DATA: not mounted.

Do you need anything else?
I will just add an noauto flag as a provisional solution, however I'd really like it to mount it fully automatically.
Does any of you have any clue? Help would be greatly appreciated.

[t42]

did you try
ntfs defaults,uid=1000,gid=1000,umask=002 0 2
or if you prefere not to share
ntfs defaults,uid=1000,gid=1000,umask=007 0 2

[rene]

Do you use home directory encryption? That is, is /dev/sda2 being mounted onto /home/stu4ben/DATA just before you overlay an ecryptfs onto /home/stu4ben/?

Admittedly that would imply you having a /home/stu4ben/DATA directory (also) in your unencrypted /home/stu4ben which does not make great sense but "bugs" in this area also don't really. You are using home directory encryption if mount shows an ecryptfs mounted on /home/stu4ben.

[t42]

Do you use home directory encryption?

That's may be (not revealed) it! Still I don't understand that sdb3 /home considering installation time note in fstab.

Edit. It's logical to use dm-crypt having separate home and being conveniently evident in lsblk output

[rene]

Looks not strange as far as I'm noticing; /dev/sdb3 on /home as a regular split-off /home, /dev/sda2 on /home/stu4ben/DATA at boot-time, /home/.ecryptfs/stu4ben/... on /home/stu4ben post-login, hiding the boot-time /home/stu4ben/DATA

[EDIT] Noticed your edit; oh well; let's just wait for confirmation/denial.

[stu4ben]

Ooh, yeah i'm using home folder encryption. That makes sense. So if i just mount it to /DATA or so, it should be fine?
Thanks a lot for your Answers.

[stu4ben]

I don't understand that sdb3 /home considering installation time note in fstab.

I installed it without current sda installed, so sdb was sda during installation. It somehow got changed to sdb when installing the Bulk HDD

[rene]

So if i just mount it to /DATA or so, it should be fine?

Yes. Common locations are /data and /mnt/data, and you can easily still have it available also under your home directory with a symlink:

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rmdir ~/DATA && ln -s /DATA ~/