BSOD 0x7B (INACCESSIBLE_BOOT_DEVICE): causes and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: INACCESSIBLE_BOOT_DEVICE windows lost access to the system partition during startup. Parameter 1 points to either a Unicode device path or the device.

Could be also:
Constant	Type	OS
ERROR_INVALID_NAME	Win32 error	Windows
EPFNOSUPPORT	errno	Solaris
ENOPROTOOPT	errno	Windows

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KERNEL_DATA_INPAGE_ERROR	BUGCODE_NDIS_DRIVER

INACCESSIBLE_BOOT_DEVICE

INACCESSIBLE_BOOT_DEVICE meaning

INACCESSIBLE_BOOT_DEVICE is bug check 0x0000007B. Windows lost access to the system partition during startup. Parameter 1 points to either a Unicode device path or the device object that could not be mounted; Parameters 2 through 4 are normally zero.

How to analyze the result

Determine whether the boot device is visible to firmware and Windows recovery, then check controller mode, storage driver availability, boot-critical registry configuration, disk path, encryption state, file-system health, and recent hardware or imaging changes.

Recovery boundary

Restore the expected storage path or boot-critical driver before changing partitions. Avoid initializing, cleaning, or reformatting the disk while the boot volume and data are still being diagnosed.

Official references

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