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Characteristics and Architecture of Serial Attached SCSI

<br>SAS is a point-to-point serial protocol that pushes information toward and from PC stockpiling gadgets, for example, hard disk drives and tape drives. Micro SATA Cables provides SAS drive adapters to meet your demands.<br><br>https://www.microsatacables.com/drive-adapters-and-drive-converters/sas

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Characteristics and Architecture of Serial Attached SCSI

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  1. Characteristics and Architecture of Serial Attached SCSI (SAS)

  2. 1. Introduction to SAS • Serial Attached SCSI (SAS) is a point-to-point serial protocol that pushes information toward and from PC stockpiling gadgets, for example, hard plate drives and tape drives. • SAS, similar to its archetype, utilizes the standard SCSI order set. SAS offers discretionary similarity with Serial ATA (SATA), variants 2 and later. • This permits the association of SATA drives to most SAS backplanes or regulators. The opposite, associating SAS drives to SATA backplanes, isn't possible.

  3. 2. Characteristics The Serial Attached SCSI standard defines several layers. These are: • Serial SCSI Protocol (SSP) – for command-level communication with SCSI devices. • Serial ATA Tunneling Protocol (STP) – for command-level communication with SATA devices. • Serial Management Protocol (SMP) – for managing the SAS fabric.

  4. 3. Architecture The architecture of SAS consists of six layers Physical layer • It defines electrical and physical characteristics. • It also defines differential signaling transmission. PHY Layer • Link initialization, speed the negotiation, and reset sequences. • Link capabilities negotiation (SAS-2 onwards)

  5. Link layer • Insertion and deletion of primitives for clock-speed disparity matching • Primitive encoding • Data scrambling for reduced EMI Port layer • Combining multiple PHYs with the same addresses into wide ports.

  6. THANKS

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