IBM i series Handbook page 377

Internal Magnetic Media
#6480 2.5 GB ¼-Inch Cartridge Tape Unit
The #6480 can be used for save/restore, Alternate IPL, migration, and ¼-inch cartridge tape
exchange using appropriate media and density.
#6481 2.5 GB ¼-Inch Cartridge (QIC)
The compatibility standard ¼-inch cartridge is the #6482. Therefore, the #6481 should only
be ordered when compatibility with System/36 tape is required.
With special compaction using Lempel Ziv 1 (LZ1), the #6481 tape unit supports up to 5 GB.
It may be used for save/restore, Alternate IPL, program distribution, migration, and QIC tape
exchange.
#6482 4 GB ¼-Inch Cartridge (QIC)
The #6482 is not compatible with System/36 tape units.
With special compaction using LZ1, the #6482 tape unit supports up to 8 GB. It may be used
for save/restore, Alternate IPL, program distribution, migration, and QIC tape exchange.
#6483 16 GB ¼-Inch Cartridge Tape Unit
The #6483 is not compatible with System/36 tape units.
Note: This tape contains different mounting parts when ordered for a Model 620, 720, or S20
that supports tape concurrent maintenance, than when ordered for a Model 600 or S10 that
does not support tape concurrent maintenance.
#6485 13 GB ¼-Inch Cartridge (QIC)
The #6485 is not compatible with System/36 tape units. It is supported, but not orderable.
#6486 25 GB ¼-Inch Cartridge (QIC)
Supported only in the 720 System unit or #9364 System Unit Expansion.
#6490 7 GB 8mm Cartridge Tape Unit
Can be used for save/restore, Alternate IPL, migration, and 8mm cartridge tape exchange
using appropriate media and density.
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Internal Magnetic Media