I have installed Ubuntu Studio, Version 22.04 LTS. I have also a NTFS partition at the same disk, which contains previously installed Windows OS.
Ubuntu Studio seems to automatically mount the NTFS partition at every computer startup (unlike normal Ubuntu).

Where can I disable automounting of the NTFS partition at every computer startup?

I would expect the automount to take place in /etc/fstab, but it is not there (I replaced parts of the UUIDs with x).

cat /etc/fstab:

UUID=664A-xxxx                            /boot/efi      vfat    umask=0077 0 2

UUID=6b1fe799-xxxx-xxxx-xxxx-xxxxxxxxxxxx /              ext4    defaults,discard 0 1

tmpfs                                     /tmp           tmpfs   defaults,noatime,mode=1777 0 0

UUID=6af10a10-xxxx-xxxx-xxxx-xxxxxxxxxxxx none           swap    sw              0       0

The automounted partition is /dev/sda3 and it gets mounted under /media/user/WIN10. There is also another NTFS partition /dev/sda4 at the disk (500MB), but it has got flags hidden,diag and it does not get automounted (just for explanation).

My blkid output:

/dev/sda1: LABEL_FATBOOT="EFIBOOT" LABEL="EFIBOOT" UUID="664A-xxxx" BLOCK_SIZE="512" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="98cb88bd-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

/dev/sda2: PARTLABEL="Microsoft reserved partition" PARTUUID="c96cdcf0-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

/dev/sda3: LABEL="WIN10" BLOCK_SIZE="512" UUID="F60xxxxxxxxxxxxx" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="84569d75-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

/dev/sda4: BLOCK_SIZE="512" UUID="981xxxxxxxxxxxxx" TYPE="ntfs" PARTUUID="5c62d1c5-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

/dev/sda5: LABEL="UBUNTU" UUID="6b1fe799-xxxx-xxxx-xxxx-xxxxxxxxxxxx" BLOCK_SIZE="4096" TYPE="ext4" PARTUUID="7ed7d9b3-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

/dev/sda6: UUID="6af10a10-xxxx-xxxx-xxxx-xxxxxxxxxxxx" TYPE="swap" PARTUUID="d74bac71-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

mount | grep sda output:

/dev/sda5 on / type ext4 (rw,relatime,discard)

/dev/sda1 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)

/dev/sda3 on /media/user/WIN10 type fuseblk (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096,uhelper=udisks2)

dmesg | grep -i mount:

[    0.122566] Mount-cache hash table entries: 32768 (order: 6, 262144 bytes, linear)

[    0.122566] Mountpoint-cache hash table entries: 32768 (order: 6, 262144 bytes, linear)

[    5.411235] EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null). Quota mode: none.

[    5.755437] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.

[    5.757201] systemd[1]: Mounting Huge Pages File System...

[    5.757925] systemd[1]: Mounting POSIX Message Queue File System...

[    5.758788] systemd[1]: Mounting Kernel Debug File System...

[    5.759805] systemd[1]: Mounting Kernel Trace File System...

[    5.773131] systemd[1]: Starting Remount Root and Kernel File Systems...

[    5.779286] systemd[1]: Mounted Huge Pages File System.

[    5.779562] systemd[1]: Mounted POSIX Message Queue File System.

[    5.780677] systemd[1]: Mounted Kernel Debug File System.

[    5.780872] systemd[1]: Mounted Kernel Trace File System.

[    5.782590] EXT4-fs (sda5): re-mounted. Opts: discard. Quota mode: none.

[    5.786367] systemd[1]: Finished Remount Root and Kernel File Systems.

[    5.787998] systemd[1]: Mounting FUSE Control File System...

[    5.789074] systemd[1]: Mounting Kernel Configuration File System...

[    5.799944] systemd[1]: Mounted FUSE Control File System.

[    5.800204] systemd[1]: Mounted Kernel Configuration File System.

dmesg | grep sda:

[    1.809792] sd 1:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/466 GiB)

[    1.809809] sd 1:0:0:0: [sda] Write Protect is off

[    1.809822] sd 1:0:0:0: [sda] Mode Sense: 00 3a 00 00

[    1.809884] sd 1:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA

[    1.818988]  sda: sda1 sda2 sda3 sda4 sda5 sda6 sda7

[    1.830314] sd 1:0:0:0: [sda] supports TCG Opal

[    1.830318] sd 1:0:0:0: [sda] Attached SCSI disk

[    5.411235] EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null). Quota mode: none.

[    5.782590] EXT4-fs (sda5): re-mounted. Opts: discard. Quota mode: none.

[    6.872724] Adding 4002812k swap on /dev/sda6.  Priority:-2 extents:1 across:4002812k SSFS

dmesg | grep -i ntfs:

[   62.029982] ntfs3: Max link count 4000

[   62.029991] ntfs3: Enabled Linux POSIX ACLs support

[   62.029992] ntfs3: Read-only LZX/Xpress compression included

[   62.033266] ntfs3: Unknown parameter 'windows_names'