Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
59
17
SAS Attachment
This section defines some basic terminology and describes the behavior of the drive when attached to a Serial
Attached SCSI (i.e. SAS) domain.
17.1
General
This section introduces some of the terminology that is used in describing Serial Attached SCSI (i.e. SAS).
SAS is logically a bi-directional, point to point serial data channel that leverages the SCSI protocol set. Nodes are
physically connected via a port.
Ports may be connected point-to-point via SAS expanders, to form a complex switching network, referred to as a
SAS domain.
SAS is defined in terms of a hierarchy of functions or 'protocol layers'. This discussion will focus in on the aspects of
SAS that are relevant to this product.
• SCSI Application Layer - Clause 10
• SSP Transport Layer (Serial SCSI Protocol) - Clause 9
• SAS Port Layer - Clause 8
• SSP Link Layer - Clause 7
• SAS PHY Layer - Clause 6
• SAS Physical Layer - Clause 5
All layers are defined in the following ANSI standard.
• "SAS Protocol Layer - 2 (SPL-3)"
In addition, this drive claims compliance with the following ANSI standards.
• SCSI Architecture Model (SAM-5)
• SCSI Block Commands (SBC-3)
17.2
SAS Features
The following SAS features are supported by the drive.
• SAS Compliance
- "Serial Attached SCSI - 3 (SAS-3)"
• SAS Protocol
- This drive supports Serial SCSI Protocol (SSP).
- STP (Tunneled SATA) and SMPs (Management protocols) are NOT supported.