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Zeus
IOPS
3.5-Inch Fibre Channel Solid State Drive Product Manual Rev. 1.0 37
FC-AL FEATURES
LOOP CONNECTIONS
The Zeus
IOPS
3.5-inch Fibre Channel SSD features two independent FC-AL ports. These ports may
be connected in different loops or the same loop. In addition, the drive can send transfers while
receiving frames on both ports. This capability is called “full-duplex”.
If the ports are 1) connected in different loops, 2) hard addressing is used, and 3) the drive
interface address is selected through the interface connector, then both ports will seek the
same loop address. If there are no duplicate addresses on the different loops, both ports
will use the same address.
If the ports are 1) connected in the same loop and 2) hard addressing is used, the drive
reads the settings from the connector. If the SCA connector is configured for a hard
address, only one of the ports will be seen on the loop; only one port can acquire the ID.
If the drive has 1) its ports connected to different loops, and 2) buffer availability, then the
drive is able to receive transfers on both ports at the same time. This capability is called
“concurrent port transfers”.
Table 11 summarizes the FC-AL options supported by the drive.
Table 11. FC-AL Supported Options
Option Support
OPEN Half Duplex Accepted from another device
OPEN Full Duplex Sent to open another device; accepted from another device
Private Loop Supported
Public Loop Supported
Old Port State Not supported
Loop Position Supported
Loop Position Report Supported