Here is where you're confused.
A VTL is NOT equal to a virtual tape device. No comparison.
A VTL (Virtual Tape Library) is a separate appliance. It is not a just
space on disk to store image catalog entries for use with virtual tape
A virtual tape device is something you configure with CRTDEVTAP
A VTL which integrates nicely with BRMS and existing IBM i commands
requires a fiber channel card. Some low end models which use their own
commands may connect with TCP/IP.
A VTL can have multiple (hundreds) different tape volumes in it's library
just like the big IBM physical tape libraries can have. When BRMS says
mount U00123 it will go find that volume load it up and process it. A
virtual tape device cannot do that.
IBM Certified System Administrator - IBM i 6.1
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
Kendallville, IN 46755
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