Seagate ST300MM0026 ユーザーズマニュアル

58

Savvio 10K.4 FC Product Manual, Rev. A

Figure 9 shows the location of the J1 Fibre Channel single connection attachment (FC-SCA). Figure 11 pro-
vides the dimensions of the FC-SCA connector.

Details of the physical, electrical, and logical characteristics are provided within this section. The operational 
aspects of Seagate’s Fibre Channel drives are provided in the Fibre Channel Interface Manual.. 

Image of the HDA may not represent actual product, for reference only.

This section defines physical interface connector.

FIbre Channel drives may be connected in a loop together or with other compatible FC-AL devices. A maxi-
mum of 127 devices may have addresses; however, one of the addresses is reserved for a fabric port switch 
device. This means 126 addresses are available for FC-AL devices. More FC-AL compatible devices may 
physically reside on the loop, but they will not be functional because they would not be able to obtain valid 
addresses.

Port bypass circuits (PBCs) allow devices to be inserted into unpopulated locations or removed from the loop 
with loop operation recovery after a brief interruption. These PBCs are located external to the FC-AL device. 
Figure 10 shows the relationship between the PBC and FC-AL device.

Port Bypass

Circuit N–1

Select

Drive N–1

Port Bypass

Circuit N+1

Drive N+1

Drive N

Serial
In

Serial

Out

From Previous

Drive

Port Bypass

Circuit

To Next

Drive

MUX