CN105045526A - Method for improving transmission reliability of PCIe solid-state disk - Google Patents

Abstract

The present invention discloses a method for improving transmission reliability of a PCIe solid-state disk. The method comprises the following steps: when initializing a host, determining a data size as a check data element; before starting up the host, assigning the above information to the solid state disk; when the solid state disk responds to a read command of the host, generating check data according to a data unit; before the solid state disk sends information that the response to the read command is completed to the host, sending the check data to the host; after the host receives, from the solid state disk, the information of completion of the read command, checking read data and determining whether the read data are reliable; the host submitting data determined to be reliable to the user, so as to ensure that a user always obtains correct data. The method can greatly improve reliability of data transmission.

Description

A kind of method improving PCIe solid state hard disc transmission reliability

Technical field

The present invention relates to a kind of method improving PCIe solid state hard disc transmission reliability.

Background technology

Solid state hard disc, due to plurality of advantages such as its performance are high, reliability is high, has become current most popular memory device, and application is more and more extensive.The physical interface of solid state hard disc mainly contains two kinds: SATA and PCIe.Wherein PCIe interface is due to the advantage of himself, has irreplaceable status in some application scenario.

At present, the physical interface of Based PC Ie, when solid state hard disc writes data to host memory, the former writes data in the latter, then comprises main frame and writes process and complete, if control flow does not occur exception, main frame will think that data transmission is correct, and submits to user to use data.Its main flow is as Fig. 2.

Due to PCIe transmission in, equipment to the process of Host Transfer data, main frame not perception, and only have after data end of transmission, by the information that completes of equipment, main frame just knows that data are transmitted, and only know that data are transmitted, and whether normally do not know in data transmission procedure.The packet sent to main frame when solid state hard disc is on the transmission path from solid state hard disc to host memory, and when going wrong because some is abnormal, data finally fail and arrive the assigned address of host memory.Owing to there is no verification scheme in whole flow process, thus main frame may and do not know data transmission wrong, then by the data of mistake as correct data use.Its typical scene is as Fig. 3: the original correct data of solid state hard disc transmission is A1, B1, C1, D1, E1.But the data that user finally obtains are A1, B1, C, D1, E1.Wherein C1 is misinformated in order to C.But do not have which parts to find error in data in whole process, thus cause the unreliable of data transmission.

Summary of the invention

Technical matters to be solved by this invention is, not enough for prior art, provides a kind of method improving PCIe solid state hard disc transmission reliability.

For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of method improving PCIe solid state hard disc transmission reliability, comprises the following steps:

1) main frame is when initialization, determines using certain size of data as checking data unit;

2) main frame is before initiation of services, will as above information configuration to solid state hard disc;

3) solid state hard disc is when responding the read command of main frame, by data unit, produces checking data;

4) solid state hard disc is before the information reporting read command to respond to main frame, and checking data is sent to main frame;

5), after the read command that main frame receives solid state hard disc completes information, read data is verified, judges that whether read data is reliable;

6) main frame will be judged as reliable data and submit to user, ensure that user always obtains correct data.

Compared with prior art, the beneficial effect that the present invention has is: the present invention by adding checking data in transmission data, the transmission of data between solid state hard disc and main frame can be screened out whether normal, avoid the data of mistake to be used by user, then improve the reliability of data transmission.

Accompanying drawing explanation

When Fig. 1 is PCIe solid state hard disc response main frame read command, read data is with the schematic diagram of checking data scene;

Interaction diagrams when Fig. 2 is PCIe solid state hard disc response main frame read command;

When Fig. 3 is PCIe solid state hard disc response main frame read command, occur extremely causing user to obtain the scene schematic diagram of misdata;

Fig. 4 is the schematic flow sheet of raising transmission reliability method described in the invention.

Embodiment

Method flow of the present invention as shown in Figure 4.

Embodiment:

1) when host computer system carries out initialization to solid state hard disc, transfer custom command by driver to solid state hard disc, verification data unit size is configured to equipment, such as data cell is a read command; Checking algorithm is configured to equipment, and equipment can support multiple checking algorithm, such as CRC, checksum, ECC etc., and main frame is wherein a kind of by command selection; The deposit position of checking data is configured to equipment, such as deposits immediately following after data;

2) after main frame driver have sent read command to solid state hard disc, solid state hard disc extracts read data from storage space, and by above-mentioned initialization information, uses by the algorithm engine selected data cell, calculate the check information of read data, and check information is written to the position that main frame specifies;

3) solid state hard disc completes the data of a data cell and the transmission of check information, is sent completely information to main frame, informs that Host Command completes;

4) whether main frame driver is according to completing information, utilizes the checking algorithm unit of host computer side, obtains the check information of data cell, and compare the check information calculated and mate with the check information that solid state hard disc is brought, and judges verification whether success with this;

5) driver only will verify information matches, namely verify correct data and give user, to ensure the reliability of the data delivering to user.

Claims (1)

1. improve a method for PCIe solid state hard disc transmission reliability, it is characterized in that, comprise the following steps:

1) main frame is when initialization, determines using certain size of data as checking data unit;

2) main frame is before initiation of services, will as above information configuration to solid state hard disc;

3) solid state hard disc is when responding the read command of main frame, by data unit, produces checking data;

4) solid state hard disc is before the information reporting read command to respond to main frame, and checking data is sent to main frame;

5), after the read command that main frame receives solid state hard disc completes information, read data is verified, judges that whether read data is reliable;

6) main frame will be judged as reliable data and submit to user, ensure that user always obtains correct data.