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Old 02-11-2010, 07:46 AM   #1
gjatute
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Question mount nfs problem: mount(2) Input/Output error, virtual box involved


Hello!

I'm not really sure this is the right category for this post...

I've been thinking and reading but I really don't find a solution, and this is why I decided to post here. I'm not a newbie using Linux but I know absolutely nothing about nfs and related stuff. If explanations are not clear/precise I'm sorry and absolutely open to explain myself better (I'm really desperate, at this point).

I'm running a Debian in a VirtualBox inside a RHEL5. To supply space to the virtual machine I'm trying to mount a disk (? maybe not?) that I created in the RHEL.

In RHEL: I created a directory /some/path/dir and I granted access to it from the VM (edit /etc/exports file and restart the nfs service)

In Debian: I created a directory to be used as mounting point (mkdir /other/nice/path/dir) and I tried to mount (mount -t nfs -v redhat:/some/path/dir /other/nice/path/dir). What happens next is the following:

mount.nfs: timeout set for Thu ...
mount.nfs: text-based options ...
mount.nfs: mount(2): Input/output error
mount.nfs: mount system call failed

Now, this Input/output error is too vague to trace where the problem is, but I really have no idea about how to go more in depth (are there logs somewhere? What should I look for? ... ...).

If you can give me some direction thank you very much. If not... thank you in any case for reading!
 
Old 02-11-2010, 07:52 AM   #2
backtolinux
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After filling /etc:exportfs, did you issued at the command line, as root : exportfs

this command really export what is in /etc/exports.
 
Old 02-11-2010, 07:56 AM   #3
jschiwal
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Quote:
In RHEL: I created a directory /some/path/dir and I granted access to it from the VM (edit /etc/exports file and restart the nfs service)
Could you explain this better because it sounds like you edited /etc/exports in the VM and not in the host.
 
Old 02-11-2010, 08:04 AM   #4
gjatute
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Quote:
Originally Posted by jschiwal View Post
Could you explain this better because it sounds like you edited /etc/exports in the VM and not in the host.
I edited the /etc/exports file in the host (that is RHEL) adding
/some/path/dir debian(rw)

(I used the same notation as the one I used to present the proble, debian stands for the IP address of the debian running in the VM)


@backtolinux: I did not issue that command, just restarted the nfs service (btw in this redhat installation that command is not available...)
 
Old 02-11-2010, 06:28 PM   #5
chrism01
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Try Chap 18 here (skip the autofs section) http://www.linuxtopia.org/online_boo...ion/index.html
 
Old 02-12-2010, 07:25 AM   #6
gjatute
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Dear all,

thank you very much for your attention. The problem was specifically related to the fact that I was using RedHat. It looks like its default behavior is to block all incoming traffic to an nfs server. I found this http://www.linuxconfig.org/HowTo_configure_NFS that solved my problem (it's incredible that such a common situation has so little about it in the web...)

Bye!
 
Old 10-23-2012, 02:57 PM   #7
mysilverkey
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Smile Start portmp service and check

Start portmp service and check
 
  


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