Arch Linux

bedtime

Member

Registered: 2019-02-12

Posts: 84

/etc/fstab not being obeyed [solved]

I would like my computer to mount the drives listed in /etc/fstab. Instead, it seems to auto-mount my root drive with its own options.

/etc/fstab:

# /dev/nvme0n1p3 LABEL=ROOT
#UUID=df2d0e9e-2d8d-4f79-b023-54f170b86fb1   /           btrfs       rw,noatime,ssd,discard=async,space_cache=v2,subvolid=256,subvol=/@   0 0

# /dev/nvme0n1p1 LABEL=EFI
UUID=2189-33F5       /efi        vfat        rw,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro  0 2

Note that the root directory is commented out, so it should not be mounted.

But somehow it becomes mounted and with the options that I don't want:

$ mount
...
/dev/nvme0n1p3 on / type btrfs (rw,relatime,ssd,discard=async,space_cache=v2,subvolid=256,subvol=/@)
...

I'm thinking that maybe systemd is auto-mounting it, so I masked these services:

# systemctl mask systemd-remount-fs.service
# systemctl mask efi.mount

Same result.

/etc/mkinitcpio.conf

MODULES=(lz4)
BINARIES=()
FILES=()
HOOKS=(autodetect base keyboard block udev filesystems fsck resume)
COMPRESSION="lz4"
#COMPRESSION_OPTIONS=()
MODULES_DECOMPRESS="no"

Any ideas?

Last edited by bedtime (2024-07-31 20:17:30)

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,649

Website

Re: /etc/fstab not being obeyed [solved]

How do you expect your system to work if the root partition isn't mounted?

Here's my fstab:

~$ \cat /etc/fstab                                         
# Static information about the filesystems.
# See fstab(5) for details.

# <file system> <dir> <type> <options> <dump> <pass>
~$

Does that help?

If you want different options to be applied un-comment the root partition line in /etc/fstab and edit it to your taste.

---

Para todos todo, para nosotros nada

bedtime

Member

Registered: 2019-02-12

Posts: 84

Re: /etc/fstab not being obeyed [solved]

How do you expect your system to work if the root partition isn't mounted?
...

If you want different options to be applied un-comment the root partition line in /etc/fstab and edit it to your taste.

I uncommented and unmasked the systemd services, and it's working and adhearing to /etc/fstab now.

Clearly this is over my head, lol. I'm assuming that maybe systemd services have something to do with /etc/fstab?

Anyways, it's working now.

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 13,167

Re: /etc/fstab not being obeyed [solved]

On gpt drives systemd gpt auto generator is what tries to automount  "/" and other stuff .

It can be disabled by adding systemd.gpt_auto=0 or similar as kernel parameter .

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky

cryptearth

Member

Registered: 2024-02-03

Posts: 1,165

Re: /etc/fstab not being obeyed [solved]

doesn't require systemd-automount a systemd initrd?
how does your mkinitcpio.conf looks?

bedtime

Member

Registered: 2019-02-12

Posts: 84

Re: /etc/fstab not being obeyed [solved]

On gpt drives systemd gpt auto generator is what tries to automount  "/" and other stuff .

It can be disabled by adding systemd.gpt_auto=0 or similar as kernel parameter .

Thanks so much.

doesn't require systemd-automount a systemd initrd?
how does your mkinitcpio.conf looks?

Not sure, but my mkinitcpio.conf is posted in my first post.

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,649

Website

Re: /etc/fstab not being obeyed [solved]

The location of the root partition is passed from the bootloader and the kernel applies the default options unless it is over-ridden by /etc/fstab. The auto-generator is only used for the root partition if no location is supplied by the bootloader or kernel command line.

@cryptearth: the OP already shared that config and systemd is not used in their initramfs.

---

Para todos todo, para nosotros nada

bedtime

Member

Registered: 2019-02-12

Posts: 84

Re: /etc/fstab not being obeyed [solved]

The location of the root partition is passed from the bootloader and the kernel applies the default options unless it is over-ridden by /etc/fstab. The auto-generator is only used for the root partition if no location is supplied by the bootloader or kernel command line.

Thanks for the clarification. This makes sense.