nfs mount by label not working.

nfs mount by label not working.

[Dave Mielke]

Using kernel 2.2.17-14 as supplied by RedHat, and using mount from
mount-2.9u-4, mounting by label using the -L option does not work.

    mount -L backup1 /a
    mount: no such partition found

The mount man page says that "/proc/partitions" must exist.

    ls -l /proc/partitions
    -r--r--r--   1 root     root            0 May 23 15:10 /proc/partitions

Does something need to be enabled to make this work? What else might I be doing
wrong?

-- 
Dave Mielke           | 2213 Fox Crescent | I believe that the Bible is the
Phone: 1-613-726-0014 | Ottawa, Ontario   | Word of God. Please contact me
EMail: dave@mielke.cc | Canada  K2A 1H7   | if you're concerned about Hell.

Re: nfs mount by label not working.

[Tim Moore]

v2.10r works.

[tim@abit tim]# mount -V
mount: mount-2.10r
[tim@abit tim]# tune2fs -L spare /dev/hda10
tune2fs 1.19, 13-Jul-2000 for EXT2 FS 0.5b, 95/08/09
[tim@abit tim]# mount -L spare /mnt
[tim@abit tim]# df /mnt
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/hda10             3028080   2100116    927964  69% /mnt
[tim@abit tim]# cat /proc/version
Linux version 2.2.20p2aa1-a (root@abit) (gcc version egcs-2.91.66
19990314/Linux (egcs-1.1.2 release)) #2 Sat May 19 18:46:38 PDT 2001

Dave Mielke wrote:
> 
> Using kernel 2.2.17-14 as supplied by RedHat, and using mount from
> mount-2.9u-4, mounting by label using the -L option does not work.
> 
>     mount -L backup1 /a
>     mount: no such partition found
...
> Does something need to be enabled to make this work? What else might I be doing
> wrong?


--

Re: nfs mount by label not working.

[Guest section DW]

On Wed, May 23, 2001 at 03:11:41PM -0400, Dave Mielke wrote:
> Using kernel 2.2.17-14 as supplied by RedHat, and using mount from
> mount-2.9u-4, mounting by label using the -L option does not work.
> 
>     mount -L backup1 /a
>     mount: no such partition found
> 
> The mount man page says that "/proc/partitions" must exist.
> 
>     ls -l /proc/partitions
>     -r--r--r--   1 root     root            0 May 23 15:10 /proc/partitions
> 
> Does something need to be enabled to make this work? What else might I be doing
> wrong?

Everything

> I believe that the Bible is the
> Word of God. Please contact me
> if you're concerned about Hell.

Hm. Hell - that h must have been a k - it must mean something like
the secret or hidden place, as in Latin celare or Greek kaluptein
and in cellar and conceal and occult.
Much more can be said. Some other time.

Hmm. God. Less easy. Will think about that one.
You use it as if it were a proper name, but that must be a mistake.
Gothic has "guth", a neuter consonant stem. And it is the same in
Old Nordic. Maybe the word is Germanic only? Or connection with Sanskrit hu-?

Bible. Greek: biblion. Booklet.


But concerning mount [French monter, Latin montare etc]:
(i) Your version is ancient, but it might be good enough.
(ii) Labels as used in "mount -L label" are ext2 labels only
(well, xfs also works if I recall correctly)
(iii) I forgot to implement a crystal ball, so mount is not
very good in divining [yes, that is related to the old
indoeuropean words for god] where the devices are with a
given label. However, it will try everything mentioned in /proc/partitions.
In your case that is a very short list.

Andries

Re: nfs mount by label not working.

[Dave Mielke]

[quoted lines by Guest section DW on May 23, 2001, at 23:12]

>(i) Your version is ancient, but it might be good enough.

    mount -V
    mount: mount-2.9u

>(ii) Labels as used in "mount -L label" are ext2 labels only
>(well, xfs also works if I recall correctly)

I set the labels with e2label.

>(iii) I forgot to implement a crystal ball, so mount is not
>very good in divining [yes, that is related to the old
>indoeuropean words for god] where the devices are with a
>given label. However, it will try everything mentioned in /proc/partitions.
>In your case that is a very short list.

I presume that you're assuming that my /proc/partitions is empty because its
size shows as 0:

    ls -l /proc/partitions
    -r--r--r--   1 root     root            0 May 23 17:31 /proc/partitions

It does, however, have several lines in it.

    cat /proc/partitions
    major minor  #blocks  name     rio rmerge rsect ruse wio wmerge wsect wuse running use aveq

       3     0    6297480 hda      119 141 520 1790 0 0 0 0 0 1180 1790
       3     1    1534176 hda1     0 0 0 0 0 0 0 0 0 0 0
       3     2          1 hda2     1 0 2 20 0 0 0 0 0 20 20
       3     3      96358 hda3     0 0 0 0 0 0 0 0 0 0 0
       3     4    1534207 hda4     0 0 0 0 0 0 0 0 0 0 0
       3     5    1052226 hda5     0 0 0 0 0 0 0 0 0 0 0
       3     6    1052226 hda6     1 0 2 10 0 0 0 0 0 10 10
       3     7     208813 hda7     1 0 2 20 0 0 0 0 0 20 20
       3     8     819283 hda8     115 141 512 1730 0 0 0 0 0 1120 1730
      22    64    6297480 hdd      29218 300606 783536 808790 42553 89013 382004 2952210 0 599630 3763620
      22    65     522081 hdd1     0 0 0 0 0 0 0 0 0 0 0
      22    66          1 hdd2     1 0 2 10 0 0 0 0 0 10 10
      22    69      80293 hdd5     0 0 0 0 0 0 0 0 0 0 0
      22    70     401593 hdd6     161 30 382 2570 55 6 122 10590 0 7470 13160
      22    71    1004031 hdd7     3000 54712 115428 76420 213 34 520 25520 0 60270 101940
      22    72     200781 hdd8     1 0 2 20 0 0 0 0 0 20 20
      22    73     120456 hdd9     1 0 2 10 0 0 0 0 0 10 10
      22    74     883543 hdd10    4320 35159 78992 101950 8704 20252 59014 838820 0 149590 943220
      22    75     128488 hdd11    2943 17697 165114 91090 2662 16775 155496 212510 0 143130 303600
      22    76     208813 hdd12    1 0 2 10 0 0 0 0 0 10 10
      22    77    1542208 hdd13    17758 192335 420202 515170 16930 5075 44786 1281640 0 363310 1796970
      22    78     514048 hdd14    1031 673 3408 21500 13989 46871 122066 583130 0 166600 604640

Might my problem be that the kernel is showing its size as 0 even though it
actually does contain data?

-- 
Dave Mielke           | 2213 Fox Crescent | I believe that the Bible is the
Phone: 1-613-726-0014 | Ottawa, Ontario   | Word of God. Please contact me
EMail: dave@mielke.cc | Canada  K2A 1H7   | if you're concerned about Hell.

Re: nfs mount by label not working.

[Guest section DW]

On Wed, May 23, 2001 at 05:34:22PM -0400, Dave Mielke wrote:

> I presume that you're assuming that my /proc/partitions is empty because its
> size shows as 0:
>
>     ls -l /proc/partitions
>     -r--r--r--   1 root     root            0 May 23 17:31 /proc/partitions

Ah, yes, sorry - I was too quick here.

> It does, however, have several lines in it.
>
>     cat /proc/partitions
>     major minor  #blocks  name     rio rmerge rsect ruse wio wmerge wsect wuse running use aveq
>
>        3     0    6297480 hda      119 141 520 1790 0 0 0 0 0 1180 1790

But this is full of strange numbers that someone saw fit to add to /proc/partitions.
What a bad idea!

If someone changes /proc/partitions then probably the old utilities that used it
are broken. I do not have a memory, but it seems I recall fixing this already.
Try a recent mount, say from util-linux 2.11d.

[But you show IDE disks, but the subject line talks about NFS mounts?]

Andries

Re: nfs mount by label not working.

[Philipp Matthias Hahn]

On Wed, 23 May 2001, Dave Mielke wrote:

> Using kernel 2.2.17-14 as supplied by RedHat, and using mount from
> mount-2.9u-4, mounting by label using the -L option does not work.
>
>     mount -L backup1 /a
Do you realy mean what you wrote in the Subject line:

Subject : Re: *nfs* mount by label not working.
              ^^^^^

That would be something like:
   ask every server in the known universe if it has a nfs-export by
   name backup1, choose one of them and mount it locally on /a.

If you use nfs you have to specify the server and the volume old
fashioned. Mounting by lable or uuid is supported by very few filesystems,
mainly by ext2 only.

What the kernel does is to read /proc/partitions and check if any
partition found there has the label or uuid you search for.

BYtE
Philipp
-- 
  / /  (_)__  __ ____  __ Philipp Hahn
 / /__/ / _ \/ // /\ \/ /
/____/_/_//_/\_,_/ /_/\_\ pmhahn@titan.lahn.de

Re: nfs mount by label not working.

[Dave Mielke]

[quoted lines by Philipp Matthias Hahn on May 24, 2001, at 09:31]

>Do you realy mean what you wrote in the Subject line:
>
>Subject : Re: *nfs* mount by label not working.

No, I mean ext2. It would appear that my mount command was a little old. A
newer version of mount works.

-- 
Dave Mielke           | 2213 Fox Crescent | I believe that the Bible is the
Phone: 1-613-726-0014 | Ottawa, Ontario   | Word of God. Please contact me
EMail: dave@mielke.cc | Canada  K2A 1H7   | if you're concerned about Hell.