You might see this error when running a OSD Task Sequence in SCCM 2012 R2:
Task Sequence: has failed with the error code (0x80070070). For more information, contact your system administrator or helpdesk operator.
If we take a closer look at smsts.log you might see error messages like this:
Installation of image 1 in package xxx failed to complete.
Unable to apply (0x80070070)
The message in the screenshot says everything – There is not enough space on the disk