HP0-J73 · Question #137
Which component is the same for both SAS and SATA drive technologies?
The correct answer is D. Electrical and physical interface. SAS and SATA drives share the same physical connector form factor and electrical signaling interface, which allows SATA drives to be installed in SAS backplanes.
Question
Which component is the same for both SAS and SATA drive technologies?
Exhibit
Options
- ASingle chain terminator
- BSignal encoding/decoding processor
- CDriver model transparent to parallel ATA
- DElectrical and physical interface
How the community answered
(33 responses)- B3% (1)
- C6% (2)
- D91% (30)
Why each option
SAS and SATA drives share the same physical connector form factor and electrical signaling interface, which allows SATA drives to be installed in SAS backplanes.
SAS uses bus termination for its expander architecture, whereas SATA is a point-to-point protocol that does not use chain terminators.
SAS and SATA use entirely different protocol stacks and signal encoding - SAS is based on SCSI commands while SATA uses the ATA command set.
SAS uses a SCSI driver model while SATA relies on ATA/AHCI drivers; these driver models are not shared or transparent to each other.
The SATA specification was deliberately designed with a physical and electrical interface compatible with SAS infrastructure, enabling SATA drives to connect to SAS expanders and controllers. A SAS host bus adapter can address both SAS and SATA devices, while a SATA controller can only address SATA devices, making the shared interface a one-way compatibility benefit.
Concept tested: SAS and SATA shared physical and electrical interface
Source: https://www.sata-io.org/developers/sata-i-overview
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