Where is ext2.o ? [ for optware usb ext2 installs]

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patrick0525
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PostPosted: Sat Jul 16, 2011 20:39    Post subject: Where is ext2.o ? [ for optware usb ext2 installs] Reply with quote
I converted my usb stick for optware from ext3 to ext2 and now it can't mount. It was suggested from the forum to use "insmod /lib/modules/2.4.37/ext2.o"

I can't find it. Can someone post it or post a link to it. Thanks!

Patrick
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crashfly
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PostPosted: Sat Jul 16, 2011 22:02    Post subject: Reply with quote
The location will depend on your kernel version. As mine has this directory, I suspect yours is a 2.6 kernel. Please post your router type and the firmware you are using for it.
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patrick0525
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PostPosted: Sat Jul 16, 2011 23:21    Post subject: Reply with quote
Firmware/router:
DD-WRT v24-sp2 (06/14/11) std - build 17201
Asus RT-N13U

When I formated another usb stick as ext3 everything mounted ok. How do I mount this ext2 usb stick? I copied a mega-dd-wrt wrt54g-TM's ext2.o to the /tmp directory and ran insmod /tmp/ext2.o. Still didn't work.

Any commented would be greatly appreciated. Thanks1
crashfly
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PostPosted: Sun Jul 17, 2011 15:10    Post subject: Reply with quote
Since you are using a very recent version, you have to insert the appropriate modules to get them to work right before mounting.

This should work for you (without the double quotes):
"/lib/modules/`uname -r`/ext2.o"

If it does not, you are missing another module which would make it work or your partition is not appropriately mountable by DD-WRT.

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patrick0525
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PostPosted: Sun Jul 17, 2011 18:25    Post subject: Reply with quote
There is no ext2.o

root@DD-WRT:~# ls -al /lib/modules/`uname -r`
total 0
drwxr-xr-x 3 root root 23 Jun 14 11:00 .
drwxr-xr-x 3 root root 26 Jun 14 11:00 ..
drwxr-xr-x 6 root root 50 Jun 14 11:00 kernel

What's next? Is the next steo the following:
insmod lib/modules/`uname -r`/ext2.0

How do I mount the usb stick?

Thanks!
crashfly
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PostPosted: Sun Jul 17, 2011 20:00    Post subject: Reply with quote
In my firmware (using the 2.4 kernel), there does not appear to be the "kernel" directory. Modify that command to this (without the double quotes):
"/lib/modules/`uname -r`/kernel/ext2.o"

Once the appropriate module is inserted, you should be able to mount the disk using the following command (without quotes):
"mount -t ext2 /dev/discs/disc0/part1 /mnt/location"

The '/dev/discs/disc0/part1' might have to be modified to fit the drive as well as the '/mnt/location' to where you want it to show up.

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nuke12
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Joined: 10 Jul 2011
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PostPosted: Sun Jul 17, 2011 20:33    Post subject: Reply with quote
try;

Quote:
cd /
find -name ext*
patrick0525
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Posts: 72

PostPosted: Sun Jul 17, 2011 22:05    Post subject: Reply with quote
I did
cd /
find -name ext2*

ext2.o does not exist in my version of the firmware

I do have a copy of ext2.o from the mega firmware.
Where do copy to? Looks like it's "/temp/var" (ram memory)
patrick0525
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Posts: 72

PostPosted: Sun Jul 17, 2011 22:22    Post subject: Reply with quote
On my other usb ext3 stick everything works. It's mount is the folowing:

root@DD-WRT:~# mount
rootfs on / type rootfs (rw)
/dev/root on / type squashfs (ro)
none on /dev type devfs (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
ramfs on /tmp type ramfs (rw)
devpts on /dev/pts type devpts (rw)
devpts on /proc/bus/usb type usbfs (rw)
/dev/discs/disc0/part1 on /opt type ext3 (rw,noatime,nodiratime,data=ordered)
/dev/discs/disc0/part3 on /jffs type ext3 (rw,data=ordered)
/dev/sda3 on /mnt type ext3 (rw,noatime,data=ordered



So I copied ext2.o over.
I did the following:

insmod /tmp/var/ext2.o
mount -t ext2 /dev/discs/disc0/part1 /opt

Still it doesn't mount.
Thanks!
nuke12
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Joined: 10 Jul 2011
Posts: 90

PostPosted: Mon Jul 18, 2011 2:58    Post subject: Reply with quote
Try;
Code:
lsmod

To see if the module actually loaded. Is it in the list?
patrick0525
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Joined: 16 May 2010
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PostPosted: Mon Jul 18, 2011 11:14    Post subject: Reply with quote
I will lsmod tonite and report back what modules loaded in. Thanks!
patrick0525
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Joined: 16 May 2010
Posts: 72

PostPosted: Mon Jul 18, 2011 22:29    Post subject: Reply with quote
On a working optware system that mounted a usb stick as ext3 , I did the following to see if the module attached:

insmod /tmp/ext2.o

root@DD-WRT:/# lsmod
Module Size Used by Tainted: P
nf_nat_pptp 4096 0 - Live 0x80b6c000
nf_conntrack_pptp 4096 1 nf_nat_pptp, Live 0x80c48000
nf_nat_proto_gre 4096 1 nf_nat_pptp, Live 0x81b3a000
nf_conntrack_proto_gre 4096 1 nf_conntrack_pptp, Live 0x81434000
ext3 106496 2 - Live 0x81ae0000
mbcache 8192 1 ext3, Live 0x81a7c000
jbd 57344 1 ext3, Live 0x81aa0000
etherip 8192 0 - Live 0x819b8000
usblp 8192 0 - Live 0x81fbc000
scsi_wait_scan 480 0 - Live 0x81fa3000

I guess insmod didn't install ext2.0.
Any comments?
Dark_Shadow
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PostPosted: Tue Jul 19, 2011 0:03    Post subject: Reply with quote
Asus RT-N13U = Ralink chipset. This thread should be moved to that forum.
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crashfly
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Location: Sol System > Earth > USA > Arkansas

PostPosted: Tue Jul 19, 2011 5:12    Post subject: Reply with quote
patrick0525 wrote:
I guess insmod didn't install ext2.0.
Any comments?

It is odd (to me anyway) that your "standard" version does not include the ext2 module with it. (Maybe try a different version that will still fit?)

You might be able to get away with using the ext3 file system anyway. If you use the option:
Code:
mount -t ext3 -o noload /device /location

The "-o noload" is suppose to set ext3 not to load the journal (At least that is what the man file mentions on fedora.)

Do realize your mileage may vary.

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LOM
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Posts: 7633

PostPosted: Tue Jul 19, 2011 11:20    Post subject: Reply with quote
You can not use a module built for Linux kernel 2.4 (Broadcom based WRT54 routers) on an RaLink based router running Linux 2.6

There is a long thread in the Ralink section on how to load usb and file system modules on the RT-N13U.

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