Hello everyone,
i am currently trying to enable SSH access on my old SamKnows WhiteBox (WDR 3600, V1.1, blue leds). I followed the instructions from https://gist.github.com/Mag81/44097d9a54574a5b2ed8, but I can't get any further with step 2. The device outputs:
P E R F O R M A N C E M O N I T O R I N G
OS: OpenWRT Attitude Adjustment, r35093
SW: WDR3600 Build
root@(none):/# mount_root
/sbin/mount_root: line 1: pi_include: not found
/sbin/mount_root: line 1: pi_include: not found
/sbin/mount_root: line 1: set_jffs_mp: not found
/sbin/mount_root: line 1: determine_root_device: not found
/sbin/mount_root: line 1: can't create /.extroot.md5sum: Read-only file system
switching to jffs2
Update: Using passwd seems to be useless, recabling, rebooting and connecting to port 2222 was not successful.
Update #2: Found this site: http://gerryk.com/posts/reflashing_the_samknows_tp_link_router/. mount_root works, same error messages. Transferring firmware via scp did not work out, so I used wget and local http server. Afterwards I flashed the current Openwrt release. Solved 
Thanks