How long does tier 3 support take ?

It depends on the issue and how full the L3 tech's queue is.

Support should let you know when they are done, I think.

Have they confirmed that they can connect to your system and have you returned the disclaimer?
I waited for 6 days after the above despite a call and promise that they'd escalate to a priority for level 3. In the end they did not access my system, but there was a distinct lack of communication from their end once they had access and permission from me.
Perhaps give them a call after 48 hours if no communication from them.

Tier 2 was connected and confirmed they can connect. I have agreed to the permission. Tier 2 told me 48 hrs but that has been and gone so I just wondered how long should I wait before giving them a nudge.
Cheers.

Tier 2 was connected and confirmed they can connect. I have agreed to the permission. Tier 2 told me 48 hrs but that has been and gone so I just wondered how long should I wait before giving them a nudge.
Cheers.

I assume you are paying for the support.
If that is the case, given the problem you have, over 48 hours is not acceptable.
I would have already called them by now.

Well it is the weekend. I would wait and see if a L3 tech takes a look at it shortly after the weekend.

Its free support as device is only 25 days old, I was just wondering how long I needed to give them before I assume all data is gone and start rebuilding from backups. I am a bit worried with a device so new to get this problem though.

I was told that level 3 tech works on call at weekends when my box was in tech support mode, and that the estimate of 1-2 days included weekends.

Tier 3 called today and after 2 hours managed to get all my files back. Phew.

My problem was caused by my drives not sleeping correctly, they would sleep and then wake straight back up again. On this occasion spinning up never finished and I had to power off by removing plug.

When it had booted it decided to rename my share from Media to media. media being the default folder it creates when new. My data was all in Media and therefore I couldn't see it.

For now I have turned off sleeping, anyone have any ideas what could be the cause of it not sleeping correctly. My only add ons are transmission and photos2. No backups set as yet.

What brand and model drves are you using?