Mac Mini writing data like mad to hard drive!!!

Any help on this would be much appreciated. Immediately after start up there is a massive amount of data being written to the hard drive. You can see it on monitor.app; the average write speed is about 12 Mb per second. In 15 or 20 minutes the disk is full and there is no more space for the startup programs. This obviously totally clogs the system and nothing will run properly. I can't even run the antivirus coz this looks and feels like a virus. When I switch off and boot again the capacity on the hard drive is free again (100 Gb) and the whole process repeats itself.
I am posting this from the MacBook which fortunately is unaffected.
I could try and reload OS from the disk but I'd like to understand first what the heck is going on.
Help!!!!!

I deleted Techtool Pro and Voila. Problem solved. Thanks a million!!!!!

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'checking for slow read failures': ERROR - Target device access failure - Test failed.
CAN I ACCESS HD (which is our data server) EVER AGAIN? IF SO, HOW?
Meanwhile we wonder if this is really a hardware error. It all happened during writing a time machine backup.
Probably while writing it, some data was relocated by accident, but we can not 100%-sure remember the sequence of actions :/
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- we started with cmd+alt+p+r pressed
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ANY IDEAS?
IS IT A SOFTWARE- OR HARDWARE ERROR?
THX IN ADVANCE!

BDAqua wrote:
I thnk Intenal 2.5" Drives for servers is silly, & Ithink the Minis & iMacs re poorly cooled.
I'd get Temprature Monitor & see what temps they're running.
Is Temperature Monitor an app or a device? If it's a temperature problem then that is essentially a design problem. Two drive failures in the same Mac mini server in four months combined with the fact that they're not really user serviceable already has me 90% on the way back to more pragmatically designed Linux servers. I think it would be foolish to waste any more money on these minis for my business hosting.

HT1338 how much is the mac mini A1347,i7,4GB RAM,1TB hard drive ?? and wat maximum upgrading for the ram ? thannks :D

how much is the mac mini A1347,i7,4GB RAM,1TB hard drive ?? and wat maximum upgrading for the ram ? thannks

go to Apples website and look. That's what anyone else here would do.

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Hello everyone,
I return once more seeking your support if I may...
I went down to the Genius Bar today, as my Mac Mini was having the multi-colour circle not-responding icon showing an awful lot, and it was struggling to perform simple tasks.
I bought my mac mini 2 years ago (12-Mar-11), and I was told there was an I/O error; and i needed a new hard drive.
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Mac Mini writing data like mad to hard drive!!!

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