Seagate ST9900705SS Savvio 10K.4 FC Product Manual - Page 54
Dual port support
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9.1.10 Fibre Channel Arbitrated Loop options Table 14 lists the FC-AL options supported by Savvio 10K.4 FC drives. Table 14: FC-AL options supported Option OPEN Half Duplex OPEN Full Duplex Private Loop Public Loop Old Port State Loop Position Loop Position Report Supported Accepted from another device. Sent to open another device. Accepted from another device. Yes Yes No Yes Yes 9.2 Dual port support Savvio 10K.4 FC drives have two independent FC-AL ports. These ports may be connected on independent loops or on the same loop. Port A and Port B may be connected in any order or combination. • If both ports are connected on independent loops and hard addressing is used, the drive interface address is selected through the interface connector, both ports will seek the same loop address. If no conflict, both ports will have the same loop address. • If both ports are connected in the same loop and hard addressing is used, at least one port will attempt taking a soft address to prevent an address conflict. Subject to buffer availability, the Savvio 10K.4 FC drives support: • Concurrent port transfers-The drive supports receiving transfers on both ports at the same time when the ports are on independent loops. • Full duplex-The drive supports sending FCP_Data, FCP_RSP, FCP_XFR_RDY and ELS transfers while receiving frames on both ports. 48 Savvio 10K.4 FC Product Manual, Rev. A