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Previously, I prevented auto-mounting of a particular partition at boot by the following line in /etc/fstab

UUID=<alphanumeric> /media/windowsHDD ntfs user,noauto 0 0

At some point in the last year, this failed, and the partition was automatically mounted on boot. I attempted the following, which also failed.

/dev/sda1 /media/windowsHDD ntfs user,noauto 0 0

Thinking that perhaps I was bitten by this bug, I removed user, but that also failed.

UUID=<alphanumeric> /media/windowsHDD ntfs noauto 0 0

Is there a way to prevent auto-mounting in fstab?

Sparhawk
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    @Jobin I'll try commenting out the entire line. Oddly enough, another `noauto` entry in there still works `/dev/sdb1 /media/3030-3030/ vfat user,noauto 0 0`. – Sparhawk Feb 16 '14 at 10:30
  • In the bug report that you mentioned yourself, people suggest to use another mountpoint than one inside `/media`. This folder may get treated in a special way by Ubuntu, and some automount mechanism may mount it even though your `/etc/fstab` says otherwise. Suggestion: move the mountpoint to somewhere else (`/mnt/windowsHDD` or whatever) and try again. Don't forget to create the directory that you specify as mount point. – Malte Skoruppa Feb 16 '14 at 12:00
  • @MalteSkoruppa I tried changing the mountpoint to `/mnt/windowsHDD`. I forgot to create the directory (and I don't want it to automount anyway), but upon restart it was created and mounted there. – Sparhawk Feb 18 '14 at 05:55
  • @Jobin commenting out the entire line results in automatic mounting at `/media/sparhawk/windowsHDD`. Oddly enough, when I do specify the location to mount in fstab, the files are marked green with `ls -l`. However, when I comment everything out, they are just a normal colour. – Sparhawk Feb 18 '14 at 05:57

2 Answers2

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In order to avoid this issue make sure of 2 things:

  1. The partition is not mounted in /media
  2. The the name of the target mount directory is different than the partition label value

Check entry in /etc/fstab:

user@raspberrypi:/ $ cat /etc/fstab
/dev/sda1     /media/st1       ntfs-3g noauto,rw         0       0

Check the label of the partition:

user@raspberrypi:/ $ sudo ntfslabel -f /dev/sda1 
st1

Since the name of target mount directory (/media/st1) equals the partition label (st1), the partition will continue to mount automatically despite the noauto parameter in /etc/fstab.

Let's do something to avoid the automatic mount. Create a new directory in /mnt:

user@raspberrypi:/ $ sudo mkdir /mnt/testdir

Edit the /etc/fstab entry:

/dev/sda1     /mnt/testdir       ntfs-3g auto,rw         0       0

Finally change the label of the partition and reboot:

user@raspberrypi:/ $ sudo ntfslabel /dev/sda1 "new_label"

user@raspberrypi:/ $ sudo reboot

The partition shouldn't be mounted automatically anymore.

hymx
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    Unfortunately I moved to Arch Linux a few years ago, so I can't really comment on whether this works or not. This problem went away with the migration and/or a KDE Plasma update. However, welcome to StackExchange and thank you for posting this answer. Hopefully it will be useful to others! (P.S. have an upvote.) – Sparhawk Sep 25 '17 at 01:09
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    "Since the name of target mount directory (/media/st1) equals the partition label (st1), the partition will continue to mount automatically despite the noauto parameter in /etc/fstab." .... but why? It's been a long time since I've used labels, but this seems silly when it's explicitly set to noauto. – Angelo May 02 '19 at 13:36
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    did you mean to mount `/mnt/testdir` with `auto` and not `noauto`? – Mihail Malostanidis Dec 05 '21 at 10:47
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Try addind this to /etc/fstab. Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:

/dev/sdaX /media/external-noauto ext4 user,noauto 0 0

Or you can use PySDM

Make sure you replace X with your device ID.

Mitch
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  • Instead of noauto, what if the line is commented? – jobin Feb 16 '14 at 10:18
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    @Mitch Are you saying to add that line to fstab? Your second and third sentences suggest to run it as a command. Also, it seems like it's essentially identical to my original line, except it's ext4 when my disk is really ntfs. I want to be able to mount it at the listed location if needed, just not automatically. – Sparhawk Feb 16 '14 at 10:22
  • @Jobin I'll reply in the main comments below my question. – Sparhawk Feb 16 '14 at 10:29
  • Add to fstab, will disable auto mounting. It's slightly different than your original, where you have to add noauto after the drives name. `/dev/sdaX /media/external-noauto ntfs user,noauto 0 0` Let me know. – Mitch Feb 16 '14 at 10:38
  • That didn't work either. Upon restart, the partition automatically mounted at `/media/external-noauto` instead. – Sparhawk Feb 18 '14 at 05:53
  • Have you tried PySDM? – Mitch Feb 18 '14 at 06:26
  • @Mitch No, but from the screenshots, it looks like it can't prevent automatic mounting. – Sparhawk Feb 21 '14 at 14:55