After hours spent both on my own and (fruitlessly) with Acronis Support, I determined a solution and thought that I should share it here.
Dell Pm951 Firmware Software On ThisHopefully Acronis Support will read this and in future give better assistance to folks using Acronis backup software on this popular laptop with a Samsung NVMe PM951 M.2 SSD system drive ( I suspect other Dell systems).Dell Pm951 Firmware Drivers For ThisThe problem is Dell configures XPS 13s like mine in SATA RAID mode and Acronis boot media do not have the necessary drivers for this mode -- NEITHER Acronis Bootable Rescue Media NOR WinPE-Based Media with Acronis Plug-In have the necessary driver(s).Before performing an Acronis recovery, you must go into the XPS 13s BIOS setup and set the SATA Operation (under System Configuration) to AHCI before booting up using an Acronis boot media.
After performing the Acronis recovery, you must go back into the BIOS setup and set the SATA Operation back to RAID On so that the XPS 13 can boot (at least mine didnt have drivers for AHCS operation). The issue you faced is a known issue and has been for some time. The MVP community has developed a Script tool that creates a WinPE boot media and automatically injects the RAID drivers necessary to avoid the issue. The option you give here also works but does require a bit more expertise. Boot to the Linux Acronis rescue media and it should see the drive. Then change the SATA mode back to RAID before booting the OS. This should work fine for 1 drive NVME PCIE setups that are not actually using a real RAID or any dynamic disk setup. Dell Pm951 Firmware Download And InstallOther than having ot download and install the Micrsofot ADK, its just as easy to create when using the MVP winPE too (try the advanced mode - its just as easy to usebuild but has all the extra goodies). I managed to do so and it is not something I had ever tried to do before. Better yet, I wish that Acronis supported my very popular laptop right out of the box -- customers shouldnt have to jump through these special hoops to recover backups for such popular systems. This known problem has existed for at least a year. ![]() Micrsoft does not allow for the distrubution of prebuilt winpe so it must be created on an already licensed version of Windows. Some backup products make this seem more integral by automaticlaly downloading it as part of the installation and also making it easier to add drivers when building the media. ![]() Both of these could be improved for sure, but the option has been there all along. If the Acronis WinPE builder allowed users to supply their own drivers, and or could install the ADK more seemlessly, this would definitely be more user frendly and thats the feedback they need to hear from customers - not just here in the forum, but actually logging it with them.
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