Chapter 3: Configuring Your Library
Configuring Fibre Channel Drive Speed, Topology, and Loop ID
Quantum Scalar i6000 User’s Guide 203
Speed
The requested interface speed can be set to Auto (default;
autonegotiates to highest speed possible), 1 Gb/s, 2 Gb/s, 4 Gb/s, or 8
Gb/s (depending on drive type).
Caution: LTO-5 and later Fibre Channel tape drives can be
configured for speeds of up to 8 Gb/s. If they are
configured for 8 Gb/s, you should connect them directly to
a host and not to an FC I/O blade, because the FC I/O blade
only allows speeds up to 4 Gb/s. If you connect an LTO-5 or
later Fibre Channel tape drive to an FC I/O blade, you must
configure the tape drive speed of 4 Gb/s or less.
Note: The speed settings you choose are requested, not actual. If the
requested speed setting is not supported, the next appropriate
setting is negotiated.
To p o lo g y
The requested topology connection mode can be set to one of the
following:
• Loop (default) — Force L-Port
• Loop Preferred — Auto-configure trying L-Port first
• Point to Point — Force N-Port
Notes about point to point
• You can use Point to Point if the tape drive is connected via a switch
or directly to a host.
• You cannot use Point to Point if the tape drive is connected to an FC
I/O blade.
• You must use Point to Point if the tape drive is being used for
control path failover (see
Configure Control Path on page 361).
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