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Home > Archive > Red Hat General > June 2004 > Q: How do I add loop devices?
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| Author |
Q: How do I add loop devices?
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| Joseph Shraibman 2004-06-02, 4:51 pm |
| After using 8 loop devices further attempts to mount using loop give me:
mount: could not find any free loop device
I see there are 16 loop devices in /dev, so why can't they be used?
># losetup /dev/loop8
loop: can't open device /dev/loop8: No such device
># ls -l /dev/loop*
brw-rw---- 1 root disk 7, 0 Jan 30 2003 /dev/loop0
brw-rw---- 1 root disk 7, 1 Jan 30 2003 /dev/loop1
brw-rw---- 1 root disk 7, 10 Jan 30 2003 /dev/loop10
brw-rw---- 1 root disk 7, 11 Jan 30 2003 /dev/loop11
brw-rw---- 1 root disk 7, 12 Jan 30 2003 /dev/loop12
brw-rw---- 1 root disk 7, 13 Jan 30 2003 /dev/loop13
brw-rw---- 1 root disk 7, 14 Jan 30 2003 /dev/loop14
brw-rw---- 1 root disk 7, 15 Jan 30 2003 /dev/loop15
brw-rw---- 1 root disk 7, 2 Jan 30 2003 /dev/loop2
brw-rw---- 1 root disk 7, 3 Jan 30 2003 /dev/loop3
brw-rw---- 1 root disk 7, 4 Jan 30 2003 /dev/loop4
brw-rw---- 1 root disk 7, 5 Jan 30 2003 /dev/loop5
brw-rw---- 1 root disk 7, 6 Jan 30 2003 /dev/loop6
brw-rw---- 1 root disk 7, 7 Jan 30 2003 /dev/loop7
brw-rw---- 1 root disk 7, 8 Jan 30 2003 /dev/loop8
brw-rw---- 1 root disk 7, 9 Jan 30 2003 /dev/loop9
I'm using redhat 9
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| Alexander Dalloz 2004-06-02, 4:51 pm |
| On Wed, 02 Jun 2004 15:16:35 -0400 Joseph Shraibman wrote:
> After using 8 loop devices further attempts to mount using loop give me:
>
> mount: could not find any free loop device
>
> I see there are 16 loop devices in /dev, so why can't they be used?
>
> loop: can't open device /dev/loop8: No such device
> I'm using redhat 9
modinfo loop
gives you the answer.
Alexander
--
Alexander Dalloz | Enger, Germany
PGP key valid: made 13.07.1999
PGP fingerprint: 2307 88FD 2D41 038E 7416 14CD E197 6E88 ED69 5653
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| Joseph Shraibman 2004-06-02, 11:52 pm |
| Alexander Dalloz wrote:
>
> modinfo loop
>
> gives you the answer.
>
> Alexander
>
>
That gives me:
filename: /lib/modules/2.4.20-20.9/kernel/drivers/block/loop.o
description: <none>
author: <none>
license: "GPL"
parm: max_loop int, description "Maximum number of loop devices
(1-256)"
How do I set max_loop?
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| Alexander Dalloz 2004-06-02, 11:52 pm |
| On Wed, 02 Jun 2004 18:27:33 -0400 Joseph Shraibman wrote:
> filename: /lib/modules/2.4.20-20.9/kernel/drivers/block/loop.o
> description: <none>
> author: <none>
> license: "GPL"
> parm: max_loop int, description "Maximum number of loop devices
> (1-256)"
>
>
> How do I set max_loop?
Open up your eyes!
modprobe loop max_loop=128
Alexander
Btw. update your kernel urgently! Yours is very vulnerable in many ways.
--
Alexander Dalloz | Enger, Germany
PGP key valid: made 13.07.1999
PGP fingerprint: 2307 88FD 2D41 038E 7416 14CD E197 6E88 ED69 5653
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| Joseph Shraibman 2004-06-02, 11:52 pm |
| Alexander Dalloz wrote:
> Open up your eyes!
>
> modprobe loop max_loop=128
I tried that already. Since loop is already loaded it doesn't do anything.
>
> Alexander
>
> Btw. update your kernel urgently! Yours is very vulnerable in many ways.
>
>
I already updated, but never rebooted. I guess I'll do that now.
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| Kevin D. Snodgrass 2004-06-03, 7:51 am |
| Joseph Shraibman wrote:
> Alexander Dalloz wrote:
>
>
>
> I tried that already. Since loop is already loaded it doesn't do anything.
# modprobe -r loop
# modproge loop max_loop=128
Never tried it, but I would assume you could make an entry
in /etc/modules.conf to make this permanent...
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