I was going to open a support case, but then I found this:
http://www.symantec.com/business/support/index?page=content&id=TECH130314
It said it was a known issue and last updated on 2011. Is there any patch or hotfix for this? I already tried removed MMS and restart all BE services.
Now when I try to recreate the dedupe storage (on MMS) with any name, even deleted the old folder, still gave me the same error: dedupe storage with the same name already exists??
Some background: I had two 3600 appliances setup as CAS+MMS. I factory reset the MMS (without first remove it from CAS). Then re-join the MMS to CAS. Then the dedupe storage on the MMS disappear! And now I cannot create ANY dedupe storge on it, whatever name I gave it. I read some article on this forum that someone edit the BEDB tables to remove the "ghost" dedupe device. But is there a more standard way to fix it?
Joseph