Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
"df" output not showing mounted NFS volumes
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index Networking & Security
View previous topic :: View next topic  
Author Message
ferg
Guru
Guru


Joined: 15 Nov 2002
Posts: 434
Location: Cambridge, UK

PostPosted: Tue Mar 12, 2013 1:54 pm    Post subject: "df" output not showing mounted NFS volumes Reply with quote

Hi all,

I have a very confusing issue. On two Gentoo systems (both kept reasonably up to date, but only recently rebooted) I am having issues with some mounted NFS volumes (the same ones on both machines).

If I run "mount -l -t nfs" to list all mounted volumes of type "nfs" I see them.

Code:
scotgate chris # mount -l -t nfs
ulrich:/Distfiles on /mnt/distfiles type nfs (rw,soft,nfsvers=3,tcp,rsize=32768,wsize=32768,addr=192.168.1.12)
ulrich:/media on /mnt/media type nfs (rw,addr=192.168.1.12)
ulrich:/Download on /mnt/download type nfs (rw,soft,addr=192.168.1.12)
[b]ulrich:/motion on /mnt/motion type nfs (rw,addr=192.168.1.12)[/b]


However, one of these does not show up at all if I run df.
Code:

scotgate chris # df -T
Filesystem        Type      1K-blocks       Used  Available Use% Mounted on
rootfs            rootfs     38456212   23475036   13027680  65% /
902               ext3       38456212   23475036   13027680  65% /
devtmpfs          devtmpfs    1956360          0    1956360   0% /dev
tmpfs             tmpfs       1956612        660    1955952   1% /run
shm               tmpfs       1956612          0    1956612   0% /dev/shm
none              tmpfs       3072000          0    3072000   0% /var/tmp/portage
/dev/sdc3         xfs       918939544  871963556   46975988  95% /mnt/mythtv
/dev/sdd1         xfs       419236248  370670240   48566008  89% /mnt/mythtv2
/dev/sdb1         xfs       419236248  370381216   48855032  89% /mnt/mythtv3
/dev/sde1         xfs      1464422164   21925120 1442497044   2% /mnt/mythtv4
ulrich:/Distfiles nfs      7743214848 7030115552  713099296  91% /mnt/distfiles
ulrich:/media     nfs      7743214848 7030115456  713099392  91% /mnt/media
ulrich:/Download  nfs      7743214848 7030115456  713099392  91% /mnt/download
/dev/sda1         xfs       419236248  139142776  280093472  34% /home
scotgate chris #


What on earth am I doing wrong?
_________________
Climb up it, kayak down it + make sure it runs on GNU/Linux
"cease to exist, giving my goodbye, drive my car into the ocean,
you think I'm dead, but i sail away, on a wave of mutilation!"
Back to top
View user's profile Send private message
ce110ut
Apprentice
Apprentice


Joined: 27 Sep 2002
Posts: 199

PostPosted: Tue Mar 12, 2013 3:04 pm    Post subject: Reply with quote

Hello ferg,

Is /mnt/motion mounted for sure? That may be why it's not showing up in df.
Back to top
View user's profile Send private message
ferg
Guru
Guru


Joined: 15 Nov 2002
Posts: 434
Location: Cambridge, UK

PostPosted: Tue Mar 12, 2013 4:11 pm    Post subject: Reply with quote

Thanks for your reply.

I'm sure it's mounted.

I can create a file in the NFS share from one computer and see it turning up on the problem computers (and vica versa!).
_________________
Climb up it, kayak down it + make sure it runs on GNU/Linux
"cease to exist, giving my goodbye, drive my car into the ocean,
you think I'm dead, but i sail away, on a wave of mutilation!"
Back to top
View user's profile Send private message
ferg
Guru
Guru


Joined: 15 Nov 2002
Posts: 434
Location: Cambridge, UK

PostPosted: Thu Mar 14, 2013 11:36 am    Post subject: Reply with quote

Sorry to bump this but I've really no idea and cannot get to the bottom of this. Any ideas more than welcome?
_________________
Climb up it, kayak down it + make sure it runs on GNU/Linux
"cease to exist, giving my goodbye, drive my car into the ocean,
you think I'm dead, but i sail away, on a wave of mutilation!"
Back to top
View user's profile Send private message
lexflex
Apprentice
Apprentice


Joined: 05 Mar 2006
Posts: 168
Location: the Netherlands

PostPosted: Thu Mar 14, 2013 12:33 pm    Post subject: Reply with quote

Hi,


Is there any difference in the way they are defined in /etc/exports or mounted in fstab?
(can you post all the options you used?)

Did you try unmounting and remounting manually?

Alex.
Back to top
View user's profile Send private message
ferg
Guru
Guru


Joined: 15 Nov 2002
Posts: 434
Location: Cambridge, UK

PostPosted: Thu Mar 14, 2013 12:43 pm    Post subject: Reply with quote

Thanks for the comments.

I've tried manually unmounting/mounting and it makes no difference.

Code:
ulrich:/Distfiles    /mnt/distfiles nfs rw,soft,auto,nfsvers=3,tcp,rsize=32768,wsize=32768 0        0
ulrich:/media   /mnt/media      nfs     auto
ulrich:/Download        /mnt/download   nfs     soft 0 1
ulrich:/backup  /mnt/backup     nfs     noauto
ulrich:/motion  /mnt/motion     nfs     auto


It's distfiles and motion that are hidden. The others are fine.

The NFS shares are from a Readynas. All options are identical and have not been changed for at least a year. I'm not sure when this started happening but I _think_ they were fine a few weeks back (I rarely look at this machine as it just runs Mythtv for my TV).
_________________
Climb up it, kayak down it + make sure it runs on GNU/Linux
"cease to exist, giving my goodbye, drive my car into the ocean,
you think I'm dead, but i sail away, on a wave of mutilation!"
Back to top
View user's profile Send private message
krinn
Advocate
Advocate


Joined: 02 May 2003
Posts: 3925

PostPosted: Thu Mar 14, 2013 2:51 pm    Post subject: Reply with quote

Try diff -u /etc/mtab /proc/mounts
Could try df -a too
Back to top
View user's profile Send private message
ferg
Guru
Guru


Joined: 15 Nov 2002
Posts: 434
Location: Cambridge, UK

PostPosted: Thu Mar 14, 2013 3:03 pm    Post subject: Reply with quote

Thanks for that. "df -a" does show the missing but mounted NFS shares.

mtab also shows the missing drives (I'd forgotten about that file).

Code:
scotgate chris # diff -u /etc/mtab /proc/mounts
--- /etc/mtab   2013-03-14 11:24:28.000000000 +0000
+++ /proc/mounts   2013-03-14 14:53:15.487825193 +0000
@@ -7,16 +7,16 @@
 shm /dev/shm tmpfs rw,nosuid,nodev,noexec,relatime 0 0
 sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
 configfs /sys/kernel/config configfs rw,nosuid,nodev,noexec,relatime 0 0
-none /var/tmp/portage tmpfs rw,size=3000M,nr_inodes=1M 0 0
-/dev/sdc3 /mnt/mythtv xfs rw 0 0
-/dev/sdd1 /mnt/mythtv2 xfs rw 0 0
-/dev/sdb1 /mnt/mythtv3 xfs rw 0 0
-/dev/sde1 /mnt/mythtv4 xfs rw 0 0
-/dev/sda1 /home xfs rw 0 0
-binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nodev,noexec,nosuid 0 0
-rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
-nfsd /proc/fs/nfsd nfsd rw,nodev,noexec,nosuid 0 0
-ulrich:/Distfiles /mnt/distfiles nfs rw,soft,nfsvers=3,tcp,rsize=32768,wsize=32768,addr=192.168.1.12 0 0
-ulrich:/media /mnt/media nfs rw,addr=192.168.1.12 0 0
-ulrich:/Download /mnt/download nfs rw,soft,addr=192.168.1.12 0 0
-ulrich:/motion /mnt/motion nfs rw,addr=192.168.1.12 0 0
+none /var/tmp/portage tmpfs rw,relatime,size=3072000k,nr_inodes=1048576 0 0
+/dev/sdc3 /mnt/mythtv xfs rw,relatime,attr2,inode64,noquota 0 0
+/dev/sdd1 /mnt/mythtv2 xfs rw,relatime,attr2,inode64,noquota 0 0
+/dev/sdb1 /mnt/mythtv3 xfs rw,relatime,attr2,inode64,noquota 0 0
+/dev/sde1 /mnt/mythtv4 xfs rw,relatime,attr2,inode64,noquota 0 0
+/dev/sda1 /home xfs rw,relatime,attr2,inode64,noquota 0 0
+binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nosuid,nodev,noexec,relatime 0 0
+rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs rw,relatime 0 0
+nfsd /proc/fs/nfsd nfsd rw,nosuid,nodev,noexec,relatime 0 0
+ulrich:/Distfiles /mnt/distfiles nfs rw,relatime,vers=3,rsize=32768,wsize=32768,namlen=255,soft,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.1.12,mountvers=3,mountport=47708,mountproto=tcp,local_lock=none,addr=192.168.1.12 0 0
+ulrich:/media /mnt/media nfs rw,relatime,vers=3,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.1.12,mountvers=3,mountport=43517,mountproto=udp,local_lock=none,addr=192.168.1.12 0 0
+ulrich:/Download /mnt/download nfs rw,relatime,vers=3,rsize=131072,wsize=131072,namlen=255,soft,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.1.12,mountvers=3,mountport=43517,mountproto=udp,local_lock=none,addr=192.168.1.12 0 0
+ulrich:/motion /mnt/motion nfs rw,relatime,vers=3,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.1.12,mountvers=3,mountport=43517,mountproto=udp,local_lock=none,addr=192.168.1.12 0 0


Any clues from that?
_________________
Climb up it, kayak down it + make sure it runs on GNU/Linux
"cease to exist, giving my goodbye, drive my car into the ocean,
you think I'm dead, but i sail away, on a wave of mutilation!"
Back to top
View user's profile Send private message
krinn
Advocate
Advocate


Joined: 02 May 2003
Posts: 3925

PostPosted: Thu Mar 14, 2013 3:14 pm    Post subject: Reply with quote

no, i was thinking maybe mtab was missing them.
Back to top
View user's profile Send private message
Hu
Watchman
Watchman


Joined: 06 Mar 2007
Posts: 8602

PostPosted: Fri Mar 15, 2013 1:27 am    Post subject: Reply with quote

/etc/mtab is a regular file and can be stale. /proc/mounts is a pseudofile that is always correct for the current mount namespace. If the mount is not in /proc/mounts, then it is not actually mounted. Many people prefer to replace /etc/mtab with a symlink to /proc/mounts for this reason. However, doing so can disrupt use of mounts that specify the user mount option.
Back to top
View user's profile Send private message
ferg
Guru
Guru


Joined: 15 Nov 2002
Posts: 434
Location: Cambridge, UK

PostPosted: Fri Mar 15, 2013 8:35 am    Post subject: Reply with quote

Thanks for that.

/proc/mounts shows the missing volumes are indeed mounted. In fact the only tool that does not is running [b]df[/].

At this point I think I'll just ignore it and hope it goes away! Everything else appears to be working fine!

Thanks for everybody's input.

Cheers
Ferg
_________________
Climb up it, kayak down it + make sure it runs on GNU/Linux
"cease to exist, giving my goodbye, drive my car into the ocean,
you think I'm dead, but i sail away, on a wave of mutilation!"
Back to top
View user's profile Send private message
wizzi
n00b
n00b


Joined: 15 Mar 2008
Posts: 7
Location: Waterbury, VT

PostPosted: Tue Apr 16, 2013 2:02 am    Post subject: I don't think it's going to go away.... Reply with quote

After examining the code, I believe the problem/feature (you decide) is that "duplicate" entries are now being removed from the df output (since coreutils 8.21). I too have a ReadyNAS and I believe we are both mounting subdirectories of the unit. Basically because it's just a big disk, the free/used/etc values are going to be the same even though they are different mount points.

The reason the particular entry shows up is that they used an election of "shortest name wins".

Personally I have yet to decide whether it's a problem or feature, but at least now we know. If we stick to the "do one thing and do it well" argument for *nix utilities, it's true we shouldn't be assuming that df will show mounted devices because they are different arenas.
Aaron
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index Networking & Security All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum