As there was no solution available and I could even find an older firmware version for a rollback I've investigeted the problem by myself.
After I've found a way to logon to my LinkStation Duo running firmware 1.34 I've found the following error messages in /var/log/messages:
login as: root
root@LS-WXLF88:~#
root@LS-WXLF88:~# vi /var/log/messages
- /var/log/messages 60/60 100%
Sep 15 23:03:04 LS-WXLF88 smbd[7637]: getpeername failed. Error was Transport endpoint is not connected
Sep 15 23:03:04 LS-WXLF88 smbd[7637]: [2010/09/15 23:03:04, 0] lib/util_sock.c:write_data(562)
Sep 15 23:03:04 LS-WXLF88 smbd[7637]: write_data: write failure in writing to client 192.168.69.4. Error Connection reset by pe
Sep 15 23:03:04 LS-WXLF88 smbd[7637]: [2010/09/15 23:03:04, 0] lib/util_sock.c:send_smb(761)
Sep 15 23:03:04 LS-WXLF88 smbd[7637]: Error writing 4 bytes to client. -1. (Connection reset by peer)
Sep 15 23:03:14 LS-WXLF88 file_smb[7638]: [User:hubertus(192.168.69.4)] File Open(Read) /mnt/array1/www/htdocs/index.php
Sep 15 23:05:58 LS-WXLF88 syslogd 1.5.0: restart.
Sep 15 23:05:58 LS-WXLF88 logchkd[1683]: 000 : log file (/var/log/lighttpd.webui.access.log) is newly rotated
Sep 15 23:06:12 LS-WXLF88 twonky: Media Server script is begun. type=restart
Sep 15 23:06:12 LS-WXLF88 twonky: stop Media Server
Sep 15 23:06:16 LS-WXLF88 twonky: Media Server begins starting. contentbase=/mnt/array1/share diskinfo=/mnt/array1
Sep 15 23:06:27 LS-WXLF88 dbrescan[10489]: dbrescan: start sleep [3600]
Sep 15 23:06:28 LS-WXLF88 twonky: Media Server does not start yet.[1] Retry call ...
Sep 15 23:06:30 LS-WXLF88 twonky: Media Server does not start yet.[2] Retry call ...
Sep 15 23:06:32 LS-WXLF88 twonky: Media Server does not start yet.[3] Retry call ...
Sep 15 23:06:35 LS-WXLF88 twonky: Media Server does not start yet.[4] Retry call ...
Sep 15 23:06:37 LS-WXLF88 twonky: Media Server does not start yet.[5] Retry call ...
Sep 15 23:06:39 LS-WXLF88 twonky: Media Server does not start yet.[6] Retry call ...
Sep 15 23:06:41 LS-WXLF88 twonky: Media Server does not start yet.[7] Retry call ...
Sep 15 23:06:43 LS-WXLF88 twonky: Media Server does not start yet.[8] Retry call ...
Sep 15 23:06:45 LS-WXLF88 twonky: Media Server does not start yet.[9] Retry call ...
Sep 15 23:06:47 LS-WXLF88 twonky: Media Server start was failed in the start.
Sep 15 23:06:50 LS-WXLF88 mt-daapd[10865]: Firefly Version svn-1586: Starting with debuglevel 2
- /var/log/messages 28/60 46%
...
The above error of the media server can be easily reproduced. You just have to execute the startup script /etc/init.d/twonky.sh or restart the server from the web interface. The problem occurs with both version 1.33 and 1.34.
I would expect the vendor to provide a bugfix, as this is obviously a configuration bug in firmware release younger than 1.24.