SG0-001 · Question #307
A customer has a SAS-based storage environment with a SAS domain and some standalone servers, each with multiple built-in SAS disks. The implementation includes direct routing, table routing and subtr
The correct answer is C. routing between devices connected to an edge expander. Table routing in a SAS environment refers to the method where an expander uses an internal table of SAS addresses to route data between devices directly connected to that specific edge expander.
Question
A customer has a SAS-based storage environment with a SAS domain and some standalone servers, each with multiple built-in SAS disks. The implementation includes direct routing, table routing and subtractive routing. What is table routing?
Options
- Arouting along multiple parallel connections
- Brouting along a physical point-to-point connection
- Crouting between devices connected to an edge expander
- Drouting between devices connected to different edge expanders
How the community answered
(13 responses)- C92% (12)
- D8% (1)
Why each option
Table routing in a SAS environment refers to the method where an expander uses an internal table of SAS addresses to route data between devices directly connected to that specific edge expander.
Routing along multiple parallel connections describes link aggregation or multipathing, not a specific SAS routing type.
Routing along a physical point-to-point connection is characteristic of direct routing, which involves no expanders between the initiator and target.
Table routing occurs when a SAS expander maintains a lookup table of all connected devices' SAS addresses and the specific physical ports through which they are reachable. This enables efficient routing of data frames between initiators and targets that are directly attached to the same edge expander.
Routing between devices connected to different edge expanders typically involves subtractive routing between the expanders themselves, not solely table routing which is localized.
Concept tested: SAS routing types - Table routing
Source: https://www.intel.com/content/www/us/en/products/docs/processors/xeon/e5-1600-v3-e5-2600-v3-sas-routing-configuration-guide.html
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