You need a DD-OS downgrade kit to downgrade the DDOS as I understand and when I had a similar issue, it was basically a fresh OS install. It's not as easy like an upgrade.

Thanks for your reply.

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Marek Cierniak

W dniu 2016-02-08 16:00, nithin_s napisał(a):

ECN

DOWNGRADE DD OS OR NEW INSTALL

reply from nithin_s in Data Domain - View the full discussion

Thanks for your reply.

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Marek Cierniak

W dniu 2016-02-08 15:37, jbrooksuk napisał(a):

ECN

DOWNGRADE DD OS OR NEW INSTALL

reply from jbrooksuk in Data Domain - View the full discussion

I was always hoping there might be trick as with system upgrade history I see that always different partition is selected between sequential upgrades.  Therefore I thought one can easily rollback (given that difference between index structure between releases is not big or can be discarded).

Downgrading DD OS means wipe out all data

Sent from my iPhone

Pity. If I were unfortunate OP, I would rather update NW where there are issues (and left it as it is where they are none). Temporary, you can disable client direct in NW and that will do the trick too until you find your next steps.