Re: Recovering by failsafe: connection lost after ~30 sec

Running the filesystem check on the usb stick:

root@debian-thinkpad-x220:/home/arf# fsck -v /dev/sdb1
fsck from util-linux 2.20.1
dosfsck 3.0.13 (30 Jun 2012)
dosfsck 3.0.13, 30 Jun 2012, FAT32, LFN
Checking we can access the last sector of the filesystem
Boot sector contents:
System ID "MSDOS5.0"
Media byte 0xf8 (hard disk)
       512 bytes per logical sector
     16384 bytes per cluster
     18958 reserved sectors
First FAT starts at byte 9706496 (sector 18958)
         2 FATs, 32 bit entries
   7696896 bytes per FAT (= 15033 sectors)
Root directory start at cluster 2 (arbitrary size)
Data area starts at byte 25100288 (sector 49024)
   1923584 data clusters (31516000256 bytes)
63 sectors/track, 255 heads
       128 hidden sectors
  61603712 sectors total
Checking for unused clusters.
Reclaimed 197 unused clusters (3227648 bytes).
Checking free cluster summary.
Free cluster summary wrong (1817193 vs. really 1817583)
1) Correct
2) Don't correct
? 1
Leaving file system unchanged.
/dev/sdb1: 20088 files, 106001/1923584 clusters

It leaves the file system unchanged ... even with option y...

Then, being in static mode...

root@debian-thinkpad-x220:/etc/network# ifconfig 
eth0      Link encap:Ethernet  HWaddr f0:de:f1:6b:e9:96  
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::f2de:f1ff:fe6b:e996/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4318 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4984 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:419315 (409.4 KiB)  TX bytes:551071 (538.1 KiB)
          Interrupt:20 Memory:f2600000-f2620000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:1903 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1903 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:274569 (268.1 KiB)  TX bytes:274569 (268.1 KiB)

tried to

arf@debian-thinkpad-x220:~$ ssh 192.168.1.1
ssh: connect to host 192.168.1.1 port 22: Connection refused

Before showing the status, I have to mention that I tried even the "small Python webserver" method to "pull" the image from the box by wget-ting it. The problem turned out to be the file system has been mounted read only...

Here the status:

root@(none):/# mount
rootfs on / type rootfs (rw)
/dev/root on / 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)

root@(none):/# ls -la /mnt/
drwxr-xr-x    2 root     root             3 Apr 18  2014 .
drwxr-xr-x   16 root     root           223 May 29  2014 ..

root@(none):/# ls -la /opt
ls: /opt: No such file or directory

root@(none):/# cat /etc/config/network
cat: can't open '/etc/config/network':No such file or directory

In /etc/config you have

root@(none):/# ls -la /etc/config/
drwxr-xr-x    2 root     root           104 May 29  2014 .
drwxr-xr-x   12 root     root           728 May 29  2014 ..
-rw-r--r--    1 root     root           439 Apr 18  2014 batman-adv
-rw-r--r--    1 root     root           885 Apr 12  2014 dhcp
-rw-r--r--    1 root     root           134 Apr 12  2014 dropbear
-rw-r--r--    1 root     root          3887 Apr 12  2014 firewall
-rw-r--r--    1 root     root           335 Apr 12  2014 fstab
-rw-r--r--    1 root     root           251 Feb 12  2014 system

root@(none):/# 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"

root@(none):/# cat /etc/pbx_custom_image 
PBX_auto_Image_2.1

t@(none):/# dmesg | tail -n 20
[    0.540000] mtd: partition "rootfs" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only
[    0.550000] mtd: partition "rootfs" set to be root filesystem
[    0.560000] mtd: partition "rootfs_data" created automatically, ofs=310000, len=E0000 
[    0.560000] 0x000000310000-0x0000003f0000 : "rootfs_data"
[    0.570000] 0x0000003f0000-0x000000400000 : "art"
[    0.580000] 0x000000020000-0x0000003f0000 : "firmware"
[    0.600000] ag71xx_mdio: probed
[    0.610000] eth0: Atheros AG71xx at 0xb9000000, irq 4
[    1.160000] ag71xx ag71xx.0: eth0: connected to PHY at ag71xx-mdio.1:04 [uid=004dd041, driver=Generic PHY]
[    1.170000] TCP cubic registered
[    1.170000] NET: Registered protocol family 17
[    1.170000] Bridge firewalling registered
[    1.180000] 8021q: 802.1Q VLAN Support v1.8
[    1.190000] VFS: Mounted root (squashfs filesystem) readonly on device 31:2.
[    1.200000] Freeing unused kernel memory: 216k freed
[    3.560000] Registered led device: tp-link:green:3g
[    3.560000] Registered led device: tp-link:green:wlan
[    3.560000] Registered led device: tp-link:green:lan
[    3.560000] Registered led device: tp-link:green:wps
[    6.160000] eth0: link up (100Mbps/Full duplex)

root@(none):/# ps
  PID USER       VSZ STAT COMMAND
    1 root      1636 S    {preinit} /bin/sh /etc/preinit
    2 root         0 SW   [kthreadd]
    3 root         0 SW   [ksoftirqd/0]
    4 root         0 SW   [kworker/0:0]
    5 root         0 SW   [kworker/u:0]
    6 root         0 SW<  [khelper]
    7 root         0 SW   [kworker/u:1]
   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]
  366 root       804 S    /sbin/hotplug2 --set-worker /lib/hotplug2/worker_for
  429 root      1496 S    telnetd -l /bin/login.sh
  431 root      1488 S    lock /tmp/.failsafe
  432 root      1500 S    ash --login
  451 root      1504 S    /bin/ash --login
  478 root      1496 R    ps