Chapter 2 ā Architecture Overview Fibre Channel Connectivity
December 2019 User GuideāSpectra T200, T380, and T680 Libraries
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Partitions Using Direct-Attached Fibre Channel Drives
When a partition includes Fibre Channel drives, the drives are connected
directly to the host using a Fibre Channel arbitrated loop or fabric.
Figure 24 on page 62 is a simple representation of how the robotics and
direct-attached Fibre Channel drives are connected directly to a Fibre
Channel SAN through a switch or hub.
World Wide Names for Fibre Channel Drives As part of providing network
connectivity, the drive sled firmware assigns a location-based WWN for
the drive it houses. This WWN is displayed on the Drive Details screen and
can be used by the host software to address the drive. Because this WWN is
location-based, it remains constant even if a drive is replaced by a different
one of the same type. The new drive assumes the location-based BlueScale
identifier and WWN.
Note: The WWN displayed on the Drive Details screen is actually the
WWPN for port A on the drive sled. The WWPN for port B is the
same as the one for port A except that the second digit from the
left is 2 instead of 1.
Figure 28 The WWN assigned to a Fibre Channel drive.
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