Flash Extractor用户手册-读取重试

Read Retry 读取重试

Read Retry is a command that can be sent to memory chip before reading
读取重试是一个命令，可以在读取之前发送给内存芯片
It can improve quality of ECC map
它可以提高ECC位图的质量

Some chips have this command, some not.
有些芯片有这个命令，有些则没有。
Command can be different for different chips
对于不同的芯片，命令可能是不同的

To use Retry command fill Retry field in config
在配置中使用重试命令填充重试字段
And reread chip
和重读芯片

Sandisk is command type name
Sandisk是命令类型的名称
10 is retry value
10是重试次数

There is different command type names for different chips
不同的芯片有不同的命令类型名称
Each type have different possible value range
每种类型都有不同的可能值范围
With different values you will have different result
有不同的值你会得到不同的结果

Each chip and each bank of same chip can have different Retry value
每个芯片和同一芯片的每个bank可以有不同的重试值

Best Retry Value

To find best Retry Value you can use “Test Retry” function at mix editor
若要找到最佳重试值，可以在混合编辑器中使用 “Test Retry” 功能

– Insert chip in reader
-在阅读器中插入芯片
– Select chip and bank at mix editor
-在混合编辑器中选择芯片和 bank
– Select worst place on ECC map
-在ECC位图上选择最差的地方
– Do not select start of dump on ECC map
-不要选择dump在ECC位图的开始
– Run this funcion
–运行这个功能

If chip config have predefined retry value, use it for test
如果芯片配置具有预定义的重试值，则将其用于测试
If not, you can try all retry command from list
如果没有，可以从列表中尝试所有重试命令

Function will check all possible Retry values with this command
功能将使用此命令检查所有可能的重试值
And show best value
并显示最佳价值

Example:
例如：

Sandisk / 0   Green 449   Red 904   Time 1234  
Sandisk / 1   Green 651   Red 702   Time 1203  
Sandisk / 2   Green 857   Red 496   Time 1281  
Sandisk / 3   Green 975   Red 378   Time 1109  
Sandisk / 4   Green 1137  Red 216   Time 1031  
Sandisk / 5   Green 1245  Red 108   Time 985   
Sandisk / 6   Green 1317  Red 36    Time 922   
Sandisk / 7   Green 1343  Red 10    Time 875   
Sandisk / 8   Green 1349  Red 4     Time 828   
Sandisk / 9   Green 1353  Red 0     Time 797   
Sandisk / 10  Green 1353  Red 0     Time 782   
Sandisk / 11  Green 1353  Red 0     Time 766   
Sandisk / 12  Green 1353  Red 0     Time 750   
Sandisk / 13  Green 1353  Red 0     Time 766   
Sandisk / 14  Green 1353  Red 0     Time 812   
Sandisk / 15  Green 1353  Red 0     Time 859   
Sandisk / 16  Green 1351  Red 2     Time 906   
Sandisk / 17  Green 1323  Red 30    Time 1000  
Sandisk / 18  Green 1271  Red 82    Time 1078  
Sandisk / 19  Green 1050  Red 303   Time 1156  
Sandisk / 20  Green 680   Red 673   Time 1203  
Sandisk / 21  Green 420   Red 933   Time 1250  
Sandisk / 22  Green 238   Red 1115  Time 1265  
Sandisk / 23  Green 54    Red 1299  Time 1265  

Best value:
Sandisk / 12

This function do not change dump files
此功能不会更改dump文件
Need copy found value in config Retry field
需要在配置重试字段中找到值
And reread dump
并重读dump

Need repeat this operation for all chips and banks
需要对所有芯片和banks重复此操作

Options选项

Combine 结合:
Calc statictics only for red sectors in main dump. So, it will show what Retry Value to use to make dump better at red places
计算统计信息仅适用于主dump中的红色扇区。所以，它将显示使用什么重试值以使dump在红色位置更好
To find Retry Value for first read use Combine = Off
要查找重试值首次阅读使用Combine = Off
To find Retry Value for second read use Combine = On
要找到第二次读取的重试值Combine = On

If ECC map is still not perfect
如果ECC位图仍然不完美

Make Test Retry with option “Combine” = On
使用选项”Combine” = On测试重试
It will count only sectors with red ECC
它只会计数红色ECC的扇区
If found good Retry value, read new dumps in temporary folder
如果找到好的重试值，请在临时文件夹中读取新的dumps
Open dumps in main folder, and make ECC Combine
在主文件夹中打开dumps，并进行ECC组合
Read about it here: ECC
关于读取:ECC