JET_errBadBackupDatabaseSize

Code: 0xfffffdcf (4294966735)

As HRESULT:

S: 1 (Failure)
R: 1 (Part of the wrapped NTSTATUS severity, since N is set)
C: 1 (Customer-defined)
N: 1 (Wraps an NTSTATUS value)
X: 1 (Reserved, only expected on the TRK exceptions)
Facility: 0x7ff (Unknown facility)
Code: 0xfdcf (64975)

As NTSTATUS:

Sev: 3 (STATUS_SEVERITY_ERROR)
C: 1 (Customer-defined)
N: 1 (Reserved, must be clear in a well-formed NTSTATUS)
Facility: 0xfff (Unknown facility)
Code: 0xfdcf (64975)

Abstract

The backup database size is not in 4k

Documented in Win32

Extensible Storage Engine Error Codes

The backup database size is not a multiple of the database page size.