Actually after doing some research and looking around. I managed to rollback my DSM4.0-2219 to DSM3.2-1955 on my DS411, and all my videos are streaming flawlessly to my macbook pro now. including 40+ gb blu-ray image. I have yet to try it on my Egreat R200 but I'm optimistic.
Here is how I rollback:
First download the .pat file you want from http://usdl.synology.com/download/DiskStation/DSM3.2/1955/
Download the file based on your diskstation model.
I'm Using Macbook Pro, so I use my Terminal to access the diskstation via SSH. But before you could do that,
- Login to your diskstation using admin and go to the control panel. Select Terminal and enable SSH or telnet depending on what you're using.
- also if you did not have a password for admin, put in the password now. If you access via ssh using root but leaving the password blank, you will get permission denied.
Run your Terminal app from utilities.
At the command line, type in: ssh root@yourDiskstationIP
it will then ask you to enter your password. You should then come to something like
at this point, type in: vi /etc.defaults/VERSION
you will see something like:
builddate="2012/**/**" (sorry I can't remember the exact date)
press "i" to make changes
change it to
after that press ESC and save it by typing :wq
This is the version before the 1955. The idea is to change to a version before 1955.
Now log in back into your diskstation as admin, doesn't matter if it still shows DSM 4.0. Go to system info, your DSM should now be DSM3.2-1922.
Go to control panel and click on DSM Update. Select Manual update and select the .pat file you downloaded earlier. and click OK. that's it. Once it's done you should be back to 3.2-1955.
This is for a newbie like myself. To most of you is probably usual stuff. Hopefully someone finds it useful