I had several system freezes in Windows 10 Technical Preview (build 9926 - but I also had those freezes on earlier builds) on my Macbook Air 2013.
System Event-Log shows a warning for ID 129, storahci, Reset to device, \Device\RaidPort0, was issued.
Seems to be some problem related to the SATA-Controller and the SSD (In my case Apple/Samsung SM0128F)
I was able to fix the problem by editing several registry entries:
1. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\0012ee47-9041-4b5d-9b77-535fba8b1442\0b2d69d7-a2a1-449c-9680-f91c70521c60 and change the "Attributes" key value from 1 (default; hidden) to 2 (exposed). [This will expose "AHCI Link Power Management - HIPM/DIPM" under Hard Disk power settings]
2. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\0012ee47-9041-4b5d-9b77-535fba8b1442\dab60367-53fe-4fbc-825e-521d069d2456 and change the "Attributes" key value from 1 (default; hidden) to 2 (exposed). [This will expose "AHCI Link Power Management - Adaptive" under Hard Disk power settings]
Now you can edit AHCI Link Power Management options in your power profiles. You can either set them to "active" - or in my case I set them to HIPM. (Host-initiated) (While DIPM would be a device initiated sata bus power down).
Those settings control the behavior of the sata bus power state - they do not power down the device.
Set NOLPM to * - those keys contain several hardware ID's (vendor and device) for storage devices. Setting NOLPM to * disables LPM control messages to any storage device.
4. I also set SingleIO to * - never had any freezes or storahci warnings again.
I hope this helps those who have also been looking for a solution for a long time.
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