BTRFS not mounting (unknown filesystem type)

sunite · 2012-05-14 21:13:26

Hi everyone,

From a USB drive I have been trying to install Arch in the fashion given in https://wiki.archlinux.org/index.php/In … Btrfs_root, I have upgraded the system to the newest kernel (3.3.6) and using the instructions created 2 partitions on /dev/sda. One being for Grub to boot the system, and the other being the btrfs.

I have been unable to mount the btrfs device (/dev/sda2), I keep getting the error

[root@archiso ~]# mount -o defaults,noatime /dev/sda2 /mnt/btrfs-root
mount: unknown filesystem type 'btrfs'

mount, i.e. util-linux is the newest version 2.21.1

any help is really appreciated

WorMzy · 2012-05-14 21:25:39

Have you rebooted since upgrading the kernel?

sunite · 2012-05-14 21:40:47

No I did not, I am unable to do so being that Archiso is loaded in RAM. I did think that that could be an issue, but I am unsure.

WorMzy · 2012-05-14 21:52:52

Well, I think the problem is caused by the loaded kernel being unable to find it's modules (the btrfs module included) because they got uninstalled when you upgraded the kernel package. You could try manually loading the module with modprobe (using -f if you get errors regarding versions), but I can't recommend that course of action, nor can I guarantee that it will fix your mounting problem.

sunite · 2012-05-14 21:55:13

hmmm, apart from using modprobe, what other alternatives could there be? Is there a way to save the current setup I have running in RAM, say on the USB drive, and restart the system?

WorMzy · 2012-05-14 22:24:11

cp -rpx / /media/usb

possibly?

See https://wiki.archlinux.org/index.php/In … _a_USB_key and adjust it to fit your situation.

sunite · 2012-05-14 22:37:18

It would seem that mount and umount do not work correctly anymore. I tried to install my current setup onto a spare hdd that I had laying around, partitioned using AIF's auto system to save time, but none of the devices could be mounted....i think IÄll just have to leave it at that and try something different.

thanks for all your help WorMzy

Arch Linux

#1 2012-05-14 21:13:26

BTRFS not mounting (unknown filesystem type)

#2 2012-05-14 21:25:39

Re: BTRFS not mounting (unknown filesystem type)

#3 2012-05-14 21:40:47

Re: BTRFS not mounting (unknown filesystem type)

#4 2012-05-14 21:52:52

Re: BTRFS not mounting (unknown filesystem type)

#5 2012-05-14 21:55:13

Re: BTRFS not mounting (unknown filesystem type)

#6 2012-05-14 22:24:11

Re: BTRFS not mounting (unknown filesystem type)

#7 2012-05-14 22:37:18

Re: BTRFS not mounting (unknown filesystem type)

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