Really quick post on issue experienced recently.
We were trying to build some Lenovo T470Ps and one was exhibiting this error just before the task sequence was to start and failed as a result before we even got off the ground. The error translates to The system cannot find the drive specified. However I knew for a fact that the drivers were OK as other T470Ps were building fine.
Transpires that somewhere along the way, something had indeed got mixed up on the disk and it was having problems with the config. I initially tried a DISKPART then CLEAN but this wasn’t enough and it was continuing to fail.
In the end I resorted to doing the task sequence’s job manually and recreating the partitions as follows:
Open CMD prompt (F8):
2. Select disk 0 (0 being the disk to setup)
4. Convert gpt
5. Create partition efi size=300
6. Format quick fs=FAT32
7. Create partition msr size=128
8. Create partition primary
9. Assign letter=c
10.Format quick fs=NTFS
Exit DISKPART and try again – this time the task sequence continued as expected.