Problem with momentus XT ST750LX003 hybrid hard drive in my macbook aluminium 2009

I have change the hard drive in my macbook aluminium 2009, the new drive is Seagate (Momentus XT ST750LX003) hybrid drive.
Each time osx turn off the drive all the applications are killed except osx. I have tested 2 different drives and i have the same problem with both. Seagate do not have anything about this problem.
I even turn off the power saving of the computer and the hard drive... but after an hour of inactivity all the apps are killed ( except osx).
Anyone can help?

Mid June 2012 bought a Momentus XT 750 for the just released 15" MBP. It was manufactured in Oct 2011 according to the box and firmware was SM12. I liked the speed and most of the time it would seem to work fine, however there was a problem with corruption of large files - few hundreds of MB and larger. Archives wouldn't unpack properly, md5 hash would report different results, VMware virtual machines (using huge files as virtual drives) would fail randomly.
It took me a while to narrow it down to the HDD, as this Mac also had freezing issues with graphics drivers (these now seem to be fine with OS 10.8, also upcoming 10.7.5 should help, although pre-11G30 builds were junk). On top of this I installed 16 GB RAM which is not supported by Apple so I wasn't sure what's causing trouble...
I returned the XT 750 (Best Buy) after reading numerous similar reports on the net and finding that there is no firmware update for this model yet (500 GB version had similar issues which were eventually addressed in firmware). I noticed that they had a new batch of these drives made in April 2012 and the PN was different: 9JB1A1-575 instead of the older drive's -574. However when I unpacked it the label still said SM12 for firmware, so I won't bother installing it and I'll go with a regular 7200 rpm 750 GB drive (got a Hitachi drive) and delay the upgrade for a real SSD when the prices go down.

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2011-07-05 20:02:19 +0200: Disk Utility started.
2011-07-05 20:04:41 +0200: Verifying volume “Time Machine-sikkerhetskopier”
Starting verification tool: 2011-07-05 20:04:41 +0200
2011-07-05 20:04:41 +0200: Invalid content in Journal
2011-07-05 20:04:41 +0200: Checking Journaled HFS Plus volume.
2011-07-05 20:04:41 +0200: Detected a case-sensitive catalog.
2011-07-05 20:04:45 +0200: Checking Extents Overflow file.
2011-07-05 20:04:56 +0200: Checking Catalog file.
2011-07-05 20:23:35 +0200: Stopped by user
Verifying tool completed: 2011-07-05 20:23:35 +0200
2011-07-05 20:23:35 +0200:
2011-07-05 20:23:35 +0200:
2011-07-05 20:23:38 +0200: Verify and Repair volume “Time Machine-sikkerhetskopier”
Starting repair tool: 2011-07-05 20:23:38 +0200
2011-07-05 20:23:40 +0200: Invalid content in Journal
2011-07-05 20:23:40 +0200: Checking Journaled HFS Plus volume.
2011-07-05 20:23:43 +0200: Detected a case-sensitive catalog.
2011-07-05 20:23:47 +0200: Checking Extents Overflow file.
2011-07-05 20:23:54 +0200: Checking Catalog file.
2011-07-05 20:41:30 +0200: Stopped by user
Repair tool completed: 2011-07-05 20:41:33 +0200
2011-07-05 20:41:33 +0200:
2011-07-05 20:41:33 +0200:

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Problem with momentus XT ST750LX003 hybrid hard drive in my macbook aluminium 2009

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