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Question Rephrased:

On our NAS, I have 3 LUNS created (I do not know if this is the cause of the problem).

On my DC, I have attached them using iScsi, and have created them as a disk. On that Disk I created folders so my users can access and use.

For each folder, the Sharing settings are for Everyone: R/W enter image description here enter image description here

After some time (noticed more after reboots) everyone looses access to the drives. What I need to do in order to bring it back is: Check the checkbox for: Do not share this folder. Press OK. And than check the : Share this folder. This I need to do for every folder on the drive.

The security settings I have are for Authenticated Users full control. enter image description here

Why is it happening?

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You've given us almost zero information here, seriously, how on earth could we answer this, just no details whatsoever. I'll close the question very soon if you don't add more. –  Chopper3 Sep 14 '11 at 9:17
    
I don't see how LUNs are relevant here yet the acronym appears both in the question title and 3 times in the question. –  Joshua Hoblitt Sep 14 '11 at 9:57
    
I have edited the question to give as much information as I can –  Saariko Sep 15 '11 at 6:17
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1 Answer 1

up vote 2 down vote accepted

The problem was that our NAS that hosts the LUNS, had a scheduled restart every Sunday morning. And the server does not refreshes the links to the attached LUNS.

I have cancelled the restarts, and now all is well.

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3  
Who can be so crazy to schedule a weekly restart on a SAN?!? :-O –  Massimo Oct 11 '11 at 10:23
    
Whoever it is, he must be related to the BOFH somehow. –  the-wabbit Oct 11 '11 at 12:47
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