loop mount error

[narendar]

I was unable to mount the iso image via loop device
example
dd if=/dev/zero of=/ramdisk/test.iso bs=1024k count-20
mke2fs -b 2048 /ramdisk/test.iso
(press y for continue)
mkdir /test
mount -o loop /tmp/test.iso /test

(it gives error as ioctl: LOOP_SET_FD invalid argument)

so please advice me is there any other way to mount the iso file

[eadz]

you cannot mount loopback fs's from a ramdisk. copy it to a real partition then try to mount it.

[dolphin]

you cannot mount loopback fs's from a ramdisk. copy it to a real partition then try to mount it.

So how is it possible that the kernel on the knoppix CD can do it from tmpfs (/ramdisk).

It does a loopback mount when it creates the image for the terminal-server on line 230 in /etc/init.d/knoppix-terminalserver

When I use my own kernel it doesn't work, so anyone an idea what other patches knoppix uses to make this work?

[narendar]

I sorted out this problem, when you copy the iso image to /ramdisk it doesn't work and it will work if you copy the iso image to /, but yiu need to rebuild the initrd.gz with more space

[dolphin]

FYI

I've found the solution .. knoppix uses loop-aes which seems to work on tmpfs

http://www.knopper.net/knoppix/sourc..._1.6i-1.tar.gz

I've used that module and now I can loopback mount images