from one day ago i back to openwrt, i has some problems again but some i solve it..

1. now the say what it is.. the sd card is mounted by his mod on /overlay!
working fine here.
but in the web-man "System->Mount Points"

2. AutoMount SWAP File dont works!

the swapon command works fine if i type in shell

======
root@OpenWrt:~# free
              total         used         free       shared      buffers
  Mem:        14324        12972         1352            0         1624
Swap:            0            0            0
Total:        14324        12972         1352
root@OpenWrt:~# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root                 1728      1728         0 100% /rom
tmpfs                     7160       128      7032   2% /tmp
/dev/mtdblock/4         257404     75180    169170  31% /overlay
mini_fo:/overlay          1728      1728         0 100% /
/dev/sdcard/part1       257404     75180    169170  31% /overlay
root@OpenWrt:~# swapon /overlay/swap
root@OpenWrt:~# free
              total         used         free       shared      buffers
  Mem:        14324        12556         1768            0         1356
Swap:        63992            0        63992
Total:        78316        12556        65760
root@OpenWrt:~#
======
how it do it ?
1- dd if=/dev/zero of=/overlay/swap bs=1k count=*SIZE OF FILE*
2- mkswap /overlay/swap
3- swapon  /overlay/swap

i have others partions on SD Card but again dont work mount for it..
======
root@OpenWrt:~# cd /dev/sdcard/
root@OpenWrt:/dev/sdcard# ls -al
drwxr-xr-x    1 root     root            0 Jan  1  1970 .
drwxr-xr-x    1 root     root            0 Jan  1  1970 ..
brw-------    1 root     root     254,   0 Jan  1  1970 disc
brw-------    1 root     root     254,   1 Jan  1  1970 part1
brw-------    1 root     root     254,   2 Jan  1  1970 part2
brw-------    1 root     root     254,   3 Jan  1  1970 part3
======

Here is the dmesg http://pastebin.com/mZd5Xxug

1: Your solution should work, but the preffered solution is to mount it to some mountpoint (lets call it /mnt/extroot) and mark it as the rootfilesystem in /etc/fstab. The wiki entry for extroot explains it.
2: Looks good to me.

i dont want only to replace /overlay because gives me an error with installation of more packages ... no free space on some drive/folder

now trying to whole_rootfs [ http://wiki.openwrt.org/doc/howto/extroot ]
sdcard by default is mounted on /sdcard

LOGz will say more ::

login as: root
root@192.168.1.1's password:


BusyBox v1.15.3 (2011-10-28 22:43:32 CEST) built-in shell (ash)
Enter 'help' for a list of built-in commands.

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 Backfire (10.03.1-RC6, r28680) --------------------
  * 1/3 shot Kahlua    In a shot glass, layer Kahlua
  * 1/3 shot Bailey's  on the bottom, then Bailey's,
  * 1/3 shot Vodka     then Vodka.
 ---------------------------------------------------
root@core:~# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root                 1728      1728         0 100% /rom
tmpfs                     7160       124      7036   2% /tmp
/dev/mtdblock/4           1536       488      1048  32% /overlay
mini_fo:/overlay          1728      1728         0 100% /
/dev/sdcard/part1       958488     25480    884320   3% /sdcard
root@core:~# mount
rootfs on / type rootfs (rw)
/dev/root on /rom type squashfs (ro)
none on /dev type devfs (rw)
none on /proc type proc (rw)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw)
/dev/mtdblock/4 on /overlay type jffs2 (rw)
mini_fo:/overlay on / type mini_fo (rw)
/dev/sdcard/part1 on /sdcard type ext3 (rw)
root@core:~# dd if=/dev/zero of=/sdcard/swap bs=1k count=32767
32767+0 records in
32767+0 records out
root@core:~# mkswap /sdcard/swap
Setting up swapspace version 1, size = 33549312 bytes
UUID=e01331f1-45ec-454b-ab8b-b8ee00046c01
root@core:~# free
              total         used         free       shared      buffers
  Mem:        14324        12960         1364            0          876
 Swap:            0            0            0
Total:        14324        12960         1364
root@core:~# swapon /sdcard/swap
root@core:~# free
              total         used         free       shared      buffers
  Mem:        14324        12844         1480            0          896
 Swap:        32756            0        32756
Total:        47080        12844        34236
root@core:~# reboot
root@core:~#

i put in /etc/config/fstab
config mount
option target /
option device /sdcard
option fstype ext3
option options rw,sync
option enabled 1
option enabled_fsck 0

the file system in "mount points" show me the /sdcard is filesystem of /dev/sdcard/part1

root@core:~# mkfs.ext3 /dev/sdcard/part1
mke2fs 1.41.11 (14-Mar-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
60928 inodes, 243456 blocks
12172 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=251658240
8 block groups
32768 blocks per group, 32768 fragments per group
7616 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376

Writing inode tables: done
Creating journal (4096 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 23 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.

mkdir /tmp/cproot
mount --bind / /tmp/cproot
tar -C /tmp/cproot -cvf - . | tar -C /sdcard -xvf -
umount /tmp/cproot

(Last edited by d-Byte on 22 Nov 2011, 16:09)

You probably want this to be /dev/sdcard/part1.
About your swap issue: http://wiki.openwrt.org/doc/uci/fstab
It's probably easiest and safest to use a swap partition instead of a file. Otherwise you would need to make sure the filesystem is mounted before the swapfile will be accessed.