MR3020 does not serve home page any more

Using PB a lot for a month: really smart (involving teachers in italy: here and here).

Yesterday wanted to add some mods:

[*] RESET_CHAT="no" -> ok
[*] UPLOADFOLDER="$SHARE_FOLDER/Upload" -> troubles began

At first I made it wrong by creating the Upload directory in the wrong place, but then I put it in /mnt/usb/PirateBox, but the problem remained: the wireless network is there - all devices sees it, DHCP lease was correct - but the PB home was not reachable.

Basically, what I see:

[*] dmesg tells about difficulties in mounting EXT4-fs
[*] ps: no python is running
[*] ps: no lighttpd

I would like to understand what's going on and, if possible solve in a more clever way than, eventually, reinstalling - with mtd write -r openwrt<TAB> firmware (correct?)

Here the output, that I compared with your example

***
mount
***
rootfs on / type rootfs (rw)
/dev/root on /rom type squashfs (ro,relatime)
proc on /proc type proc (rw,noatime)
sysfs on /sys type sysfs (rw,noatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime)
tmpfs on /dev type tmpfs (rw,noatime,size=512k,mode=755)
devpts on /dev/pts type devpts (rw,noatime,mode=600)
/dev/mtdblock3 on /overlay type jffs2 (rw,noatime)
overlayfs:/overlay on / type overlayfs (rw,relatime,lowerdir=/,upperdir=/overlay)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
/dev/sda1 on /mnt/usb type vfat (rw,sync,relatime,fmask=0000,dmask=0000,allow_utime=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/loop0 on /mnt/ext type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered)
/dev/loop1 on /opt/piratebox type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered)
none on /proc/bus/usb type usbfs (rw,relatime)

***
ls -la /mnt/
***
drwxr-xr-x    1 root     root             0 Jan  1 00:01 .
drwxr-xr-x    1 root     root             0 Jan  1 00:00 ..
drwxr-xr-x    4 root     root          1024 May 29  2014 ext
drwxrwxrwx   11 root     root         16384 Jan  1 00:00 usb

***
ls -la /mnt/usb (yes, I have other stuff there, but it did not create problems till now...)
***
drwxrwxrwx   11 root     root         16384 Jan  1 00:00 .
drwxr-xr-x    1 root     root             0 Jan  1 00:01 ..
drwxrwxrwx    4 root     root         16384 Apr 27  2014 .Spotlight-V100
drwxrwxrwx    4 root     root         16384 Jun  8  2014 .Trash-1000
drwxrwxrwx    2 root     root         16384 Apr 27  2014 .Trashes
-rwxrwxrwx    1 root     root          4096 Apr 27  2014 ._.Trashes
-rwxrwxrwx    1 root     root          4096 May 25  2014 ._video ISIA
drwxrwxrwx    2 root     root         16384 Apr 27  2014 142704_pollock
drwxrwxrwx    5 root     root         16384 Jan  1  1980 PirateBox
-rwxrwxrwx    1 root     root     216148461 Jan  1  1980 PirateBox.tgz
drwxrwxrwx    2 root     root         16384 Jan  1 00:06 debug
drwxrwxrwx   12 root     root         16384 Jan  1  1980 etc
drwxrwxrwx    2 root     root         16384 Jan  1  1980 external_fs
drwxrwxrwx    3 root     root         16384 Jan  1  1980 install
-rwxrwxrwx    1 root     root         50925 Jan  1  1980 install.log
-rwxrwxrwx    1 root     root       3932160 Jun  6  2014 openwrt-ar71xx-generic-tl-mr3020-v1-squashfs-factory.bin

***
ls -la /mnt/usb/PirateBox
***
drwxrwxrwx    5 root     root         16384 Jan  1  1980 .
drwxrwxrwx   11 root     root         16384 Jan  1 00:00 ..
drwxrwxrwx    6 root     root         16384 Jan  1  1980 Shared
drwxrwxrwx   11 root     root         16384 Jan  1  1980 board
-rwxrwxrwx    1 root     root        156504 Jan  1  1980 cerco-messaggio
-rwxrwxrwx    1 root     root          4876 Jan  1  1980 index-da-opt-piratebox-www.html
-rwxrwxrwx    1 root     root          4554 Jun  9  2014 index.html
-rwxrwxrwx    1 root     root      52428800 Jan  1 00:00 pbIMG_ws.img
drwxrwxrwx    2 root     root         16384 Jan  1  1980 tmp

***
ls -la /opt/piratebox
***
drwxr-xr-x   10 root     root          1024 Jan  1 00:00 .
drwxr-xr-x    3 root     root             0 Jan  1 00:04 ..
drwxr-xr-x    3 root     root          1024 May 29  2014 bin
drwxr-xr-x    3 root     root          1024 Jan  1 00:00 conf
drwxr-xr-x    2 root     root          1024 May 29  2014 init.d
drwx------    2 root     root         12288 Jan 16  2014 lost+found
drwxr-xr-x    2 root     root          1024 Jan  1 00:02 python_lib
lrwxrwxrwx    1 root     root            18 Jan  1 00:00 share -> /mnt/usb/PirateBox
drwxr-xr-x    2 root     root          1024 Jan  1 00:02 src
drwxr-xr-x    2 nobody   nogroup       1024 Jan  1 00:00 tmp
-rw-r--r--    1 root     root            19 May 29  2014 version
drwxr-xr-x    4 nobody   nogroup       1024 Jan  1 00:02 www

***
ls -la /opt/piratebox/www
***
drwxr-xr-x    4 nobody   nogroup       1024 Jan  1 00:02 .
drwxr-xr-x   10 root     root          1024 Jan  1 00:00 ..
-rwxr-xr-x    1 nobody   nogroup       1458 May 29  2014 .READ.ME.htm
lrwxrwxrwx    1 root     root            27 Jan  1 00:04 Shared -> /opt/piratebox/share/Shared
lrwxrwxrwx    1 root     root            26 Jan  1 00:04 board -> /opt/piratebox/share/board
drwxr-xr-x    2 nobody   nogroup       1024 May 29  2014 cgi-bin
-rw-r--r--    1 nobody   nogroup        810 Jan  1 00:00 chat_content.html
-rwxr-xr-x    1 nobody   nogroup       1406 May 29  2014 favicon.ico
-rwxr-xr-x    1 nobody   nogroup        254 Jan  1 00:04 forum.html
-rwxr-xr-x    1 nobody   nogroup       4876 Jan  1 00:16 index.html
-rw-r--r--    1 nobody   nogroup       3773 Jan  1 00:08 index.html.bak
-rw-r--r--    1 nobody   nogroup       4416 Jan  1  1970 index.html.ita.bak
-rwxr-xr-x    1 nobody   nogroup      94840 May 29  2014 jquery.min.js
drwxr-xr-x    3 nobody   nogroup       1024 May 29  2014 library
-rw-r--r--    nogroup       2992 May 29  2014 menu.png
-rw-r--r--    1 nobody   nogroup         15 May 29  2014 ncsi.txt
-rw-r--r--    1 nobody   nogroup       6607 May 29  2014 piratebox-logo-horizontal-white.png
-rwxr-xr-x    1 nobody   nogroup      12637 May 29  2014 piratebox-logo-small.png
-rwxr-xr-x    1 nobody   nogroup        201 Jan  1  1970 redirect.html
-rwxr-xr-x    1 nobody   nogroup       3715 May 29  2014 scripts.js
-rw-r--r--    1 nobody   nogroup       5056 May 29  2014 style.css

***
cat /opt/piratebox/version
***
piratebox-ws_1.0.0

***
cat /etc/config/network 
***
config interface 'loopback'
	option ifname 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config interface 'lan'
	option ifname 'eth0'
	option type 'bridge'
	option proto 'static'
	option ipaddr '192.168.1.1'
	option netmask '255.255.255.0'

***
cat /etc/config/wireless
***
config wifi-device 'radio0'
	option type 'mac80211'
	option channel '11'
	option hwmode '11ng'
	option macaddr '10:fe:ed:4c:c7:52'
	option htmode 'HT20'
	list ht_capab 'SHORT-GI-20'
	list ht_capab 'SHORT-GI-40'
	list ht_capab 'RX-STBC1'
	list ht_capab 'DSSS_CCK-40'
	option disabled '0'

config wifi-iface
	option device 'radio0'
	option network 'lan'
	option mode 'ap'
	option encryption 'none'
	option ssid 'PirateBox - Share Freely'

***
cat /etc/openwrt_release
***
DISTRIB_ID="OpenWrt_backports"
DISTRIB_RELEASE="12.09.2"
DISTRIB_REVISION="r40431"
DISTRIB_CODENAME="attitude_adjustment"
DISTRIB_TARGET="ar71xx/generic"
DISTRIB_DESCRIPTION="OpenWrt_backports Attitude Adjustment 12.09.2"
DISTRIB_BACKPORT="V0.2"

***
cat /etc/pbx_custom_image 
***
PBX_auto_Image_2.1

***
dmesg | tail -n 20
***
[   35.140000] EXT4-fs (loop0): mounted filesystem with ordered data mode. Opts: (null)
[   35.300000] EXT4-fs (loop1): couldn't mount as ext3 due to feature incompatibilities
[   35.310000] EXT4-fs (loop1): couldn't mount as ext2 due to feature incompatibilities
[   35.340000] EXT4-fs (loop1): mounted filesystem with ordered data mode. Opts: (null)
[   36.950000] ADDRCONF(NETDEV_UP): eth0: link is not ready
[   36.950000] device eth0 entered promiscuous mode
[   36.960000] ADDRCONF(NETDEV_UP): br-lan: link is not ready
[   37.410000] eth0: link up (100Mbps/Full duplex)
[   37.410000] br-lan: port 1(eth0) entered forwarding state
[   37.420000] br-lan: port 1(eth0) entered forwarding state
[   37.420000] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   37.450000] ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready
[   39.420000] br-lan: port 1(eth0) entered forwarding state
[   44.010000] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   44.010000] device wlan0 entered promiscuous mode
[   44.030000] br-lan: port 2(wlan0) entered forwarding state
[   44.040000] br-lan: port 2(wlan0) entered forwarding state
[   44.040000] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   46.040000] br-lan: port 2(wlan0) entered forwarding state
[   47.590000] Adding 32764k swap on /mnt/usb/external_fs/OpenWRT.swap.  Priority:-1 extents:1 across:32764k 

***
ps
***
  PID USER       VSZ STAT COMMAND
    1 root      1504 S    init
    2 root         0 SW   [kthreadd]
    3 root         0 SW   [ksoftirqd/0]
    5 root         0 SW   [kworker/u:0]
    6 root         0 SW<  [khelper]
   63 root         0 SW   [sync_supers]
   65 root         0 SW   [bdi-default]
   67 root         0 SW<  [kblockd]
   96 root         0 SW   [kswapd0]
  144 root         0 SW   [fsnotify_mark]
  173 root         0 SW<  [ath79-spi]
  184 root         0 SW   [mtdblock0]
  189 root         0 SW   [mtdblock1]
  194 root         0 SW   [mtdblock2]
  199 root         0 SW   [mtdblock3]
  204 root         0 SW   [mtdblock4]
  209 root         0 SW   [mtdblock5]
  250 root         0 SW   [kworker/0:1]
  390 root         0 SW   [kworker/0:2]
  442 root         0 SWN  [jffs2_gcd_mtd3]
  472 root         0 SW   [khubd]
  481 root         0 SW   [scsi_eh_0]
  482 root         0 SW   [usb-storage]
  483 root         0 SW   [kworker/u:2]
  507 root      1504 S    init
  540 root         0 SW<  [cfg80211]
  615 root         0 SW<  [bat_events]
  642 root      1508 S    /sbin/syslogd -C16
  644 root      1488 S    /sbin/klogd
  646 root       872 S    /sbin/hotplug2 --override --persistent --set-rules-file /etc/hotplug2.rules --set-coldplug-cmd /sbin/u
  654 root       872 S    /sbin/ubusd
  725 root         0 SW<  [loop0]
  730 root         0 SW   [jbd2/loop0-8]
  731 root         0 SW<  [ext4-dio-unwrit]
  751 root         0 SW<  [loop1]
  756 root         0 SW   [jbd2/loop1-8]
  757 root         0 SW<  [ext4-dio-unwrit]
  762 root      1468 S    /sbin/netifd
  931 root         0 SW   [flush-8:0]
 1206 root      1640 S    hostapd -P /var/run/wifi-phy0.pid -B /var/run/hostapd-phy0.conf
 1354 root      1500 S    /sbin/watchdog -t 5 /dev/watchdog
 1467 root      1152 S    /usr/sbin/dropbear -P /var/run/dropbear.1.pid -p 22
 1505 nobody     956 S    /usr/sbin/dnsmasq -C /var/etc/dnsmasq.conf
 1522 root      1500 S    /usr/sbin/ntpd -n -p 0.openwrt.pool.ntp.org -p 1.openwrt.pool.ntp.org -p 2.openwrt.pool.ntp.org -p 3.o
 1523 root      1220 S    /usr/sbin/dropbear -P /var/run/dropbear.1.pid -p 22
 1524 root      1524 S    -ash
 1573 root      1496 R    ps