SAS /SATA expander information self-adaption method and system

A self-adaptive system and self-adaptive technology, applied in the direction of input/output to record carrier, input/output process of data processing, instruments, etc., can solve the problems of different transmission path lengths, the signal quality cannot be guaranteed, etc. Data security, the effect of ensuring read and write performance

Inactive Publication Date: 2020-11-20
INSPUR SUZHOU INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing RAID technology is a purely electrical device with fixed parameters. When the signal is downlinked to the storage receiving terminal, the signal quality cannot be guaranteed due to the different length of the transmission path.

Method used

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  • SAS /SATA expander information self-adaption method and system
  • SAS /SATA expander information self-adaption method and system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0047] Example 1. On a certain server, use a Broadcom Raid Expander card as a SAS / SATA expansion device, connect multiple storage hard disks in the downlink, and use the de-emphasis method to tune the SATA_Tx eye diagram. Generally, there are four control parameters in the expander chip , including Test pattern rates, Attenuation, Pre-cursor, Post-cursor, the functions of each parameter are as follows:

[0048] Test pattern rates: used to switch the transmission signal rate, generally 3Gb / s, 6Gb / s, 12Gb / s;

[0049] Attenuation: used to adjust the signal output amplitude;

[0050] Pre-cursor and Post-cursor: Both are de-emphasis taps, "post" refers to the de-emphasis after the data "0"->"1" or "1"->"0" jumps, "pre" It refers to the de-emphasis before the data "0"->"1" or "1"->"0" jumps;

[0051] Before the adjustment, the oscilloscope shows that the eye height of the left part of the eye diagram is small, and the eye height is generally low. When Y2 and Y3 of the eye diagram ...

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PUM

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Abstract

The invention discloses an SAS (Serial Attached SCSI) / SATA (Serial Advanced Technology Attachment) expander information self-adaption method and system. A self-adaptive SASSATA3.0 Expander system converts the uplink PCIE (Peripheral Component Interconnect Express) signal into into a downlink SAS / SATA signal, is connected with a plurality of paths of SAS / SATA Receivers; and the oscilloscope scanning period is adjusted at an output terminal of the downlink, the horizontal scanning period of the oscilloscope is synchronized with the period of receiving the code element; an eye pattern is formedby utilizing the afterglow function of the oscilloscope; indexes of the eye pattern template are determined through an SAS / SATA _ Tx protocol; de-emphasis and pre-emphasis of the output end of the expander chip are dynamically adjusted through a UART link to balance a high-frequency component and a low-frequency component; the influence of the transmission link on the final eye pattern result whenthe high-frequency component attenuation is greater than the low-frequency component attenuation is reduced; the weighted value is written into the FW of the Expander chip through the UART signal link to form a feedback loop, and the inter-symbol interference is reduced; and the transmission performance of the system is improved. The invention provides a self-adaptive circuit design, and by dynamically adjusting pre-emphasis and de-emphasis of a sending end and compensating a telling signal, the read-write performance and the data security of the hard disk are ensured.

Description

technical field [0001] The invention relates to the technical field of adaptive SASSATA3.0 Expander systems, in particular to a SAS / SATA expander information adaptive method and system. Background technique [0002] With the continuous development of information technology, the storage requirements for the server are higher, especially the storage capacity and performance requirements are increasing. During the development process of the server, multiple separate physical hard disks (SAS / SATA) A logical hard disk is combined in different ways, thereby improving the read-write performance and data security of the hard disk, but with the increase of the signal rate, the skin effect of the high-speed signal and the medium loss of the transmission line make the signal suffer during transmission. In order to obtain a better waveform at the receiving terminal, it is necessary to pre-emphasize and de-emphasize compensation for the damaged signal at the transmitting end. [0003] I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/061G06F3/0629G06F3/0689
Inventor 许东
Owner INSPUR SUZHOU INTELLIGENT TECH CO LTD
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