Seagate ST9900805SS Savvio 10K.1 FC Product Manual - Page 55

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 drives. Table 14: FC-AL options supported Option Supported OPEN Half Duplex Accepted from another device. OPEN Full Duplex Sent to open another device. Accepted from another device. Private Loop Yes Public Loop Yes Old Port State No Loop Position Yes Loop Position Report Yes 9.2 Dual port support Savvio 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 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. Savvio FC Product Manual, Rev. D 49

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Savvio FC Product Manual, Rev. D
49
9.1.10
Fibre Channel Arbitrated Loop options
Table 14 lists the FC-AL options supported by Savvio drives.
9.2
Dual port support
Savvio 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 tak-
ing a soft address to prevent an address conflict.
Subject to buffer availability, the Savvio 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.
Table 14:
FC-AL options supported
Option
Supported
OPEN Half Duplex
Accepted from another device.
OPEN Full Duplex
Sent to open another device. Accepted from another device.
Private Loop
Yes
Public Loop
Yes
Old Port State
No
Loop Position
Yes
Loop Position Report
Yes