I have the same problem. It is a Linkstation Pro Duo 2 Terabyte.
I got it 2 days ago. Hooked it to me router,blah blah blah.
I left it on in AUTO, and usually I turn it off. When I got up the user id admin and the password password would NOT let me login. I have been playing with it. Done the button on the back, turned it off, done all this that is supposed to let me reset it back to defaults.
I bought this from Buy.com and thought it would be a good deal for the price. I used to work in IT/telecomm so I am not someone who is new to computers.
But I have been out of the field for a few years. I know things did not change this much in that amount of time. It is the thing just does not do as expected. A simple NAS for the home user. The user manuel does not show anything about reset,etc. I am disappointed with this. A simple RAID1 to keep stuff on.
I hope to find a fix for this or I will just have to return it and get my money back. I read reviews online and even thou this particular unit did not make it as "the one" , I thought it would be good for the buck. Now it makes me think that spending $500+ and making one would have been a better choice.
So I have been reading on here, and would hope someone would do this in easy step by step process for everyone to understand. Thanks, phil