hesela.devSerial Management Protocol
The SAS protocol for management exchanges such as discovering and configuring expander topology.
SMP is a separate member of the SAS protocol layer from SSP and STP. Its management role includes obtaining information about the SAS domain and configuring connected topology. [1] [2]
An SMP request/response exchange is not a block read or write. PHY-related management functions can report link information or control PHY operation; their results must be interpreted as management evidence rather than proof that stored user data is intact. [3]
Relations
- related
- sas, sas-expander, sas-phy, sas-phy-event-counters, serial-scsi-protocol, serial-ata-tunneled-protocol
Citations
- SNIA dictionary: SAS Protocol Layer
- Oracle 12 Gb/s SAS HBA guide: glossary, Serial Management Protocol
- T10/02-158r1: SAS technical overview, slides 14, 87, 89 and 93-97 (2002)
Sources & caveats
- Management examples use a historical T10 overview; supported functions must be checked against the actual expander and protocol revision.