Hello,

Before all, I'm new, so excuse my possible mailinglisting errors.

I'm trying to mount more than 8 loop file systems, and I can't. I have
followed a thread in this mailinglist telling how to do that, but It
has not work to me.

First, information of my system:
---------------------------------------------------------
# cat /etc/debian_version
testing/unstable

# uname -a
Linux xxxxx 2.6.16-2-686 #1 Sat Jul 15 21:59:21 UTC 2006 i686 GNU/Linux

# lsmod |grep loop
loop 14472 16

# cat /proc/cmdline
root=/dev/hda1 ro max_loop=64
---------------------------------------------------------

Here I post what I'm doing:
---------------------------------------------------------
# ls /dev/loop*
/dev/loop0 /dev/loop1 /dev/loop2 /dev/loop3 /dev/loop4 /dev/loop5
/dev/loop6 /dev/loop7

/dev/loop:
.. .. 0

# for i in $(seq 8 63) ; do mknod /dev/loop$i b 7 $i ; done
# ls /dev/loop*
/dev/loop0 /dev/loop14 /dev/loop2 /dev/loop25 /dev/loop30
/dev/loop36 /dev/loop41 /dev/loop47 /dev/loop52 /dev/loop58
/dev/loop63
/dev/loop1 /dev/loop15 /dev/loop20 /dev/loop26 /dev/loop31
/dev/loop37 /dev/loop42 /dev/loop48 /dev/loop53 /dev/loop59
/dev/loop7
/dev/loop10 /dev/loop16 /dev/loop21 /dev/loop27 /dev/loop32
/dev/loop38 /dev/loop43 /dev/loop49 /dev/loop54 /dev/loop6
/dev/loop8
/dev/loop11 /dev/loop17 /dev/loop22 /dev/loop28 /dev/loop33
/dev/loop39 /dev/loop44 /dev/loop5 /dev/loop55 /dev/loop60
/dev/loop9
/dev/loop12 /dev/loop18 /dev/loop23 /dev/loop29 /dev/loop34
/dev/loop4 /dev/loop45 /dev/loop50 /dev/loop56 /dev/loop61
/dev/loop13 /dev/loop19 /dev/loop24 /dev/loop3 /dev/loop35
/dev/loop40 /dev/loop46 /dev/loop51 /dev/loop57 /dev/loop62

/dev/loop:
.. .. 0

# chown root.disk /dev/loop*
# chmod 660 /dev/loop*

# ls -l /dev/loop29
brw-rw---- 1 root disk 7, 29 2006-12-03 14:25 /dev/loop29

# ls -l /dev/loop2
brw-rw---- 1 root disk 7, 2 2006-12-03 13:34 /dev/loop2

# mount |grep loop
/home/disk-img/prova1.com-web on /home/vdomains/prova1.com/web type
ext3 (rw,loop=/dev/loop0,usrquota,grpquota)
/home/disk-img/prova1.com-mail on /home/vdomains/prova1.com/vusers
type ext3 (rw,loop=/dev/loop1,usrquota,grpquota)
/home/disk-img/prova2.com-web on /home/vdomains/prova2.com/web type
ext3 (rw,loop=/dev/loop2)
/home/disk-img/prova2.com-mail on /home/vdomains/prova2.com/vusers
type ext3 (rw,loop=/dev/loop3)
/home/disk-img/prova3.com-web on /home/vdomains/prova3.com/web type
ext3 (rw,loop=/dev/loop4)
/home/disk-img/prova3.com-mail on /home/vdomains/prova3.com/vusers
type ext3 (rw,loop=/dev/loop5)
/home/disk-img/prova4.com-web on /home/vdomains/prova4.com/web type
ext3 (rw,loop=/dev/loop6)
/home/disk-img/prova4.com-mail on /home/vdomains/prova4.com/vusers
type ext3 (rw,loop=/dev/loop7)
---------------------------------------------------------

Here the problems:
---------------------------------------------------------
# mount -o loop /home/disk-img/prova5.com-web /home/vdomains/prova5.com/web/
mount: could not find any free loop device

# mount -o loop=/dev/loop29 /home/disk-img/prova5.com-web
/home/vdomains/prova5.com/web/
/dev/loop29: No existe tal dispositivo o dirección

(error message in English could be: "Device not found")

# ls -l /dev/loop29
brw-rw---- 1 root disk 7, 29 2006-12-03 14:25 /dev/loop29

# losetup -f
losetup: could not find any free loop device

# losetup /dev/loop29
loop: can't open device /dev/loop29: No existe tal dispositivo o dirección

# losetup /dev/loop2
/dev/loop2: [0309]:16290 (/home/disk-img/prova2.com-web)

---------------------------------------------------------

I don't know what I'm doing wrong.
Maybe I have to do something in the /dev/loop/ directory? (now is
there only a device called "0" (number zero)):

# ls -l /dev/loop/0
brw------- 1 root root 7, 0 2006-12-03 13:34 /dev/loop/0

# losetup /dev/loop/0
/dev/loop/0: [0309]:16295 (/home/disk-img/prova1.com-web)

I have viewed that if I restart the computer, all the created devices
(from 8 to 63) has disappeared and I have to creat them again...

I will be very pleasured to you If somebody could explain me what I'm
doing wrong.
Thanks.

Pere Manils

Hello sardu mohamadu,

On Sun, Dec 03, 2006 at 01:41:18PM +0100, sardu mohamadu wrote:
> Before all, I'm new, so excuse my possible mailinglisting errors.
>
> I'm trying to mount more than 8 loop file systems, and I can't. I have
> followed a thread in this mailinglist telling how to do that, but It
> has not work to me.
>
> First, information of my system:
> ---------------------------------------------------------
> # cat /etc/debian_version
> testing/unstable
>
> # uname -a
> Linux xxxxx 2.6.16-2-686 #1 Sat Jul 15 21:59:21 UTC 2006 i686 GNU/Linux
>
> # lsmod |grep loop
> loop 14472 16
>
> # cat /proc/cmdline
> root=/dev/hda1 ro max_loop=64

I seem to remember that one has to write the name of the module
before the option, like "loop.max_loop=64", if loop is a module
and not compiled into the kernel. I'm not too sure, but this is
something you could try ;-)

If it doesn't work, an alternative may be to create a file
/etc/modprobe.d/loop (for 2.6 kernels, it's different for 2.4 iand
earlier) and put into it "options loop max_loop=64".

cheers,
Max


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