| 摘要 |
A data storage system has a first chassis that has a pair of storage processors and a pair of SAS expanders, each one having a bidirectional front end port, a plurality of bidirectional backend ports, and a keyed expansion connector. The first chassis also has a pair of SAS controllers each one being coupled between a corresponding one of the pair of the processors and a corresponding one of the pair of the expanders. The first chassis also has a first plurality of multiplexers. Each one of the multiplexers has a pair of bidirectional front end ports and a pair of bidirectional back end ports. A first one of the pair of bidirectional front end ports is connected to a corresponding backend port of a corresponding one of the pair of SAS expanders. A second one of the pair of bidirectional front end ports is connected to a corresponding backend port of a corresponding one of the pair of SAS expanders. The first chassis also has a plurality of disk drives, each one being coupled to at least one backend port of a corresponding one of the first plurality of multiplexers. The system also has a second chassis that has a pair of SAS expanders, each one of the pair of SAS expanders having a bidirectional front end keyed expansion connector configured to receive only a correspondingly backend keyed cable terminator and a bidirectional backend expansion keyed connector configured to receive only a correspondingly front end keyed cable terminator. The second chassis also has a second plurality of multiplexers. Each one of the second plurality of multiplexers has a pair of bidirectional front end ports and a pair of bidirectional back end ports. The first one of the pair of bidirectional front end ports is connected to a corresponding backend port of a corresponding one of the pair of SAS expanders in the second chassis. A second one of the pair of bidirectional front end ports is connected to a corresponding backend port of a corresponding one of the pair of SAS expanders disposed in the second chassis. The second chassis also has a second plurality of disk drives, each one being coupled to at least one backend port of a corresponding one of the second plurality of multiplexers. The second chassis also has a first cable having a front end keyed terminator connected to the keyed expansion connector of a first one of the pair of SAS expanders and a backend keyed terminator connected to the front end keyed connector of a first one of the pair of SAS expanders. The second chassis also has a second cable having a front end keyed terminator connected to the keyed expansion connector of a first one of the pair of SAS expanders and a backend keyed terminator connected to the front end keyed connector of a second one of the pair of SAS expanders.
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