IDS 11.50.xC2 - Minor Upgrade Problems

I just upgraded my test IDS MACH cluster from IDS 11.50.FC1 to 11.50.FC2 and encountered two minor problems:

1. The SDS server didn't come up after the upgrade. It stuck in fast recovery and the Primary Server was blocked in a checkpoint. I was able to shutdown the SDS server via 'onmode -ky' but needed to kill the Primary server. After starting the Primary Server again, I dropped the SDS server via 'onmode -d delete SDS ', re-added it thru 'onmode -d add SDS ' and re-started the SDS node. Same situation again, it stuck in 'fast recovery'. After another restart, I dropped the 'sysha' database, re-added my SDS node and everything runs fine know. However I didn't find anything in the IDS 11.50.xC2 Releasenotes that this needs to be done when upgrading from 11.50.xC1 to 11.50.xC2.
2. The 2nd problem that I encountered was that my SDS server was no longer updatable although REDIRECTED_WRITES had been enabled in the onconfig file. It took me about two hours until I realized that REDIRECTED_WRITES is no longer included in the onconfig.std file and is also not mentioned anymore in the IDS 11.5 Information Center. The parameter has been erased and the new parameter name is UPDATABLE_SECONDARY. After enabling this one and restarting the SDS server it showed up as 'Updatable'. However, also for this issue I didn't find any hints in the IDS 11.50.xC2 Releasenotes.
3. The 'committed read' and 'committed read last committed' isolation levels can now also be set on HDR and RSS servers. But this does only work, if UPDATABLE_SECONDARY configuration parameter is also enabled. If UPDATABLE_SECONDARY is disabled, only 'dirty read' will be available on HDR and RSS servers (you can set 'committed read [last committed]' but it will be ignored). SDS servers still support 'committed read' and 'committed read last committed' regardless what the setting of UPDATABLE_SECONDARY is. The section in the releasenotes does unfortunately not explain this in any detail.

So please be aware of these stumbling blocks when upgrading to IDS 11.50.xC2. And if somebody from IBM reads this, it would be good to add this information to the releasenotes. Thank you.