Today I had the problem, that the apply image step in the Task Sequence always failed for a specific hardware type (HP 840 G1). The entries in the smsts.log showed the following entries:
Set command line: "OSDApplyOS.exe" /image:A01000B1,1 "/config:A0100747,Win7_x64-DE-CH.xml" /target:C: /runfromnet:False 13.02.2015 12:18:03 2028
Then I found also other people which have the same problem. The main cause for this issue is, that diskpart in the partition drive step is not able to set the c:\ partition to active. I tried all actual drivers, but they didn’t solve the problem too. It’s also not possible to set the partition active manually.
Until now the only workaround is to deploy these devices in AHCI instead of RAID mode. You can change this setting in the UEFI/BIOS. The problem is also discussed in the HP Forum.