Quantum DLT 8000 Product Manual page 401

What You Should Know About the DLT 7000 Emulation Feature
A DLT 8000 tape system running with DLT 7000 emulation enabled does not "become"
a DLT 7000 system, nor does it retain all of the features of a DLT 8000 system. Here are
the differences:
1. A DLT 8000 tape drive with DLT 7000 emulation enabled has the capability of
writing and reading 10 GB, 15 GB, 20 GB and 35 GB formats. It will not support
the 2.6 GB and 6.0 GB formats supported by a "real" DLT 7000 system, however.
The DLT 8000 system hardware cannot support these formats.
2. On a READ operation, a DLT 8000 system with DLT 7000 emulation enabled will
reject any tape written in 40 GB format, reporting a Medium Error with no
illumination of the cleaning light. Writing from Beginning of Tape (BOT) is
allowed, with 35 GB format as default.
3. Selection of 40 GB format from the front panel, the library port, or the SCSI bus
interface is disabled by the DLT 7000 emulation feature.
4. By design, DLT 8000 tape drives do not include an audio indicator ("beep") as a
signal for tape unloading. Running the drive with DLT 7000 emulation enabled will
not provide an audio indicator.
5. There are differences in the Power On Self Test (POST) for a DLT 7000 and a DLT
8000 with DLT 7000 emulation enabled. DLT 7000 drives run a minimized POST
due to the amount of available memory within the drives. DLT 8000 drives, even
with DLT 7000 emulation enabled, have sufficient memory available to run the full
POST image.
Appendix G: DLT 7000 Emulation Feature
Quantum DLT 8000 Tape System G-3