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andrewrob

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This has happened 3 times now.

For some reason no one can connect to the server and when I get to the server it is on but I cant do anything with it. Cant load system preferences to stop the server, cant load any applications. All network traffic has stopped. Only thing I can do is ping the server from another mac. Only thing I can do is power it down and reboot. Then its fine for a week but then does the same thing again.

Anyone have any ideas? Is there anywhere I can look to find out whats causing it?

Thinking of dropping it back to Mountain Lion in case its a Mavericks problem.
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rickblackdog

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I had a similar issue, turns out it wasn't related to kerio, but to time machine recovery partition (or lack thereof on a RAID array). Latest update seemed to solve it though? Mavericks server is a mare for file sharing, but that's another issue!
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andrewrob

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How did you determine that was the problem?

I just reformatted and installed Mountain Lion but the same thing happened this morning, wierdly got the message on webmail, "Server Storage Exhausted" but when I rebooted loads of space.

I am now wondering if it is the SSD boot drive on the Mac Mini. Just changed to a different Mac mini with normal HD and will see what happens.

Keen to try and fix the other mac though as its a faster machine.
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rickblackdog

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I tested it by turning off time machine, it was going off at particular times (3am).
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andrewrob

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Turns out the Promise RAID drive was reporting to the mac that it was out of space when actually it wasnt. I have had to take the Promise out for now but I want to put it back in so if anyone has any ideas.

I am running RAID 6 on the Promise, does anyone have an opinion on the best RAID for Kerio?
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sfpete

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Which Promise are we talking here? Pegasus?

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andrewrob

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Yes Pegasus promise raid 4. 4x1tb drives.
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sfpete

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RAID 10... is deal for Kerio Mail Stores.
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derek_500

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We are just about to migrate to a Promise Pegasus 2 (4x2TB) and after looking at our options decided RAID 10 was the way to go. RAID 5 and 6 have been criticized as having too slow write speeds to keep a mailserver happy. With only 4 drives, in RAID 10 you get fast performance and it would take more than a single drive failure to cause data loss. You could possibly lose a second drive, depending on which drive was #2 to go and still have a running system. I'm planning on getting a cold spare on hand.

RAID 5 can handle 1 drive failure. RAID 6 can handle two drive failures. RAID 10 can handle one and possibly a second if you are lucky about which is the second drive to fail before trouble.

Since we have daily backups to a different system, we feel safe with RAID 10. It's still a lot better than the single drive it used to run on!!!
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