Seagate ST100FM0113 ユーザーズマニュアル

Seagate 1200 SSD Product Manual, Rev. C

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The drive SAS differential signals comply with the intra-enclosure (internal connector) requirements of the SAS standard.

Seagate SAS-3 drives are entirely compatible with the SAS-3 Specification (T10/2212-D).

The most important characteristic of the SAS-3 drive at 6Gb/s is that the receiver is capable of adapting the equalizer to 
optimize the receive margins. The SAS-3 drive has two types of equalizers:
1. A Decision Feedback Equalizer (DFE) which utilizes the standard SAS-3 training pattern transmitted during the SNW-3 

training gap. The DFE circuit can derive an optimal equalization characteristic to compensate for many of the receive 
losses in the system.

2. A Feed Forward Equalizer (FFE) optimized to provide balanced receive margins over a range of channels bounded by 

the best and worst case channels as defined by the relevant ANSI standard.

Please contact the Seagate representative for SAS electrical details, if required.

For more information about the Phy, Link, Transport, and Applications layers of the SAS interface, refer to the Seagate SAS 
Interface Manual

, part number 100293071.

For more information about the SCSI commands used by Seagate SAS drives, refer to the Seagate SCSI Commands 
Reference Manual, part number 100293068.

Bit rate (nominal)

Mbaud

1,500

3,000

6,000

12,000

Unit interval (UI)(nominal)

ps

666.6

333.3

166.6

83.3

Impedance (nominal, differential )

ohm

100

100

100

100

Transmitter transients, maximum

V

 1.2

 1.2

 1.2

 1.2

Receiver transients, maximum

V

 1.2

 1.2

 1.2

 1.2