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A DLT8000 tape system running with DLT7000 emulation enabled does not
“become” a DLT7000 system, nor does it retain all of the features of a DLT8000
system. Here are the differences:
1. A DLT8000 tape drive with DLT7000 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” DLT7000
system, however. The DLT8000 system hardware cannot support these
formats.
2. On a READ operation, a DLT8000 system with DLT7000 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 DLT7000 emulation feature.
4. By design, DLT8000 tape drives do not include an audio indicator (“beep”) as
a signal for tape unloading. Running the drive with DLT7000 emulation
enabled will not provide an audio indicator.
5. There are differences in the Power On Self Test (POST) for a DLT7000 and a
DLT8000 with DLT7000 emulation enabled. DLT7000 drives run a minimized
POST due to the amount of available memory within the drives. DLT8000
drives, even with DLT7000 emulation enabled, have sufficient memory
available to run the full POST image.