Hi sagiw,

To upgrade the operating system in a mSATA configured computer you will need to disable the acceleration first in Intel rapid storage technology and then upgrade the operating system. Since you have not disabled the acceleration on the mSATA drive and changed the SATA operation and upgraded to Windows 8 pro You will have to follow the steps mentioned below for issue resolution.

1. Boot to Bios (F2)
2. Change SATA operation to AHCI
3. Save settings and Exit
4. As soon as the system boots up tap the ‘F8’ key to go into Advanced options
5. Choose option Repair my computer
6. Wait for 3 – 5 minutes on the black screen until the system shows up recovery options
7. On System Recovery option click next
8. On user name / password option click next (if password has been set for primary user please enter the right password)
9. On System Recovery Option screen ------>Select Command Prompt
10. At Command prompt type in Diskpart
11. Type LIST DISKà You should see 2 Disks listed like below
12. Note down the right DISK number for the next steps. On some systems mSATA HDD would be either Disk 1 or Disk 0

• Type SELECT DISK 0(Whichever is msata drive)
  It should say DISK 0 is selected
  
• Type Clean
  This should clean the msata HDD
  
• Type OFFLINE Disk
  This should make the Disk Offline
  
  
  
  

1.Type EXIT
2.
RESTART
3.
On Restart go into BIOS (F2) and change SATA back to Intel Smart Response Technology
4.
Click save and exit  and Restart
5.
Option Rom should pop up – Press Ctrl + I
6.
Press R to disable acceleration and 6 to Exit
7.
Restart the PC and boot into the Windows 8 DVD. Choose Clean Install and delete the primary partition where you previously installed Windows. Choose to install Windows into the unallocated space from the deleted partition and complete the installation.

Download the Intel rapid storage technology driver and enable the acceleration using the link below.


http://dell.to/19zB7gl

Please follow the above mentioned steps and reply us your findings.