| 摘要 |
Apparatus and methods for enabling multiple, unidirectional, virtual connections between a first SAS device and multiple other SAS devices in a SAS domain. An enhanced first SAS device may be substantially simultaneously coupled to each of two other SAS devices through one or more appropriately enhanced SAS expanders to allow substantially simultaneous unidirectional virtual connections from the first SAS device to both of the second and third SAS devices. Each virtual connection is, in essence, a half-duplex connection such that the first device is transmitting information to a second SAS device substantially simultaneous with the first device receiving information from a third SAS device. The enhancements are provided in a manner to allow backward compatibility with current SAS specifications for connectivity among devices not suitably enhanced in accordance with features and aspects hereof (e.g., with legacy devices).
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