Umount when server is not present?

fdservices · 2012-07-19 12:30:59

Can anyone tell me how to reliably unmount a filesystem from a remote server, when the server has lost its network connection (i.e. been closed down)?

For example: Mount a filesystem to /mnt/laptop, shutdown the laptop, then unmount the filesystem.

sudo umount -f /mnt/laptop does not seem to work, although I would have thought that it should have.

Thanks

Andrew

johnislarry · 2012-07-21 09:40:53

Does the command you mentioned give an error message, or does it just not unmount the filesystem? I'm not sure I completely understand the question either. Are you looking for a way to unmount a given filesystem automatically when a computer is being turned off? Like what happens to filesystems specified in /etc/fstab?

fdservices · 2012-07-21 13:24:19

OK, let me explain.

I use a main computer in the study and a laptop elsewhere. I keep a backup of the main computers files on the laptop.

So I start the laptop and leave it running. Then from the main computer I mount the laptop disk on /mnt and backup my files.

Then, sometimes, the laptop is switched off, but the disk is still mounted. This causes all sorts of problems on the main computer, so I need to un-mount the laptop disk.

# umount -f should have done exactly this, but it just sits there blinking at me.

Is there another way of forcing the umount?

Thanks

Andrew

syngin · 2012-07-21 16:23:42

Have you tried a lazy umount?

umount -l /mnt/foo

or fuser?

fuser -km /mnt/foo

fdservices · 2012-07-21 16:34:09

Thanks - I will try them and let you know

Andrew

Pres · 2012-07-21 23:02:09

How is the laptop disk shared with your main computer? Samba? NFS?

I've run into this problem before with Samba, but just simply using `umount` unmounts the filesystem fine.

fdservices · 2012-07-22 07:35:13

NFS

Andrew

fdservices · 2012-07-23 13:29:21

None of these work, they all just time out

Cheers

Andrew

zenlord · 2012-07-26 14:18:31

If you're using networkmanager to make the connection, you should look into the dispatcher scripts. They make it possible to only try to connect to a certain network drive if a specific connection is established and subsequently umount it if the connection is closed down.

I use this setup to connect to my office NFS-share when I'm at the office and to connect to my personal server when I'm at home. No connection attempts fail because a certain server is not present.

Now I'm writing this, I 'm not sure it will solve your problem, but it is relevant either way

Arch Linux

#1 2012-07-19 12:30:59

Umount when server is not present?

#2 2012-07-21 09:40:53

Re: Umount when server is not present?

#3 2012-07-21 13:24:19

Re: Umount when server is not present?

#4 2012-07-21 16:23:42

Re: Umount when server is not present?

#5 2012-07-21 16:34:09

Re: Umount when server is not present?

#6 2012-07-21 23:02:09

Re: Umount when server is not present?

#7 2012-07-22 07:35:13

Re: Umount when server is not present?

#8 2012-07-23 13:29:21

Re: Umount when server is not present?

#9 2012-07-26 14:18:31

Re: Umount when server is not present?

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