Read Retry?讀取重試

Read Retry is a command that can be sent to memory chip before reading
讀取重試是一個命令，可以在讀取之前發(fā)送給內(nèi)存芯片
It can improve quality of ECC map
它可以提高ECC位圖的質(zhì)量

Some chips have this command, some not.
有些芯片有這個命令，有些則沒有。
Command can be different for different chips
對于不同的芯片，命令可能是不同的

To use Retry command fill Retry field in config
在配置中使用重試命令填充重試字段
And reread chip
和重讀芯片

Sandisk is command type name
Sandisk是命令類型的名稱
10 is retry value
10是重試次數(shù)

There is different command type names for different chips
不同的芯片有不同的命令類型名稱
Each type have different possible value range
每種類型都有不同的可能值范圍
With different values you will have different result
有不同的值你會得到不同的結(jié)果

Each chip and each bank of same chip can have different Retry value
每個芯片和同一芯片的每個bank可以有不同的重試值

Best Retry Value

To find best Retry Value you can use “Test Retry” function at mix editor
若要找到最佳重試值，可以在混合編輯器中使用 “Test Retry” 功能

– Insert chip in reader
-在閱讀器中插入芯片
– Select chip and bank at mix editor
-在混合編輯器中選擇芯片和 bank
– Select worst place on ECC map
-在ECC位圖上選擇最差的地方
– Do not select start of dump on ECC map
-不要選擇dump在ECC位圖的開始
– Run this funcion
–運行這個功能

If chip config have predefined retry value, use it for test
如果芯片配置具有預定義的重試值，則將其用于測試
If not, you can try all retry command from list
如果沒有，可以從列表中嘗試所有重試命令

Function will check all possible Retry values with this command
功能將使用此命令檢查所有可能的重試值
And show best value
并顯示最佳價值

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
此功能不會更改dump文件
Need copy found value in config Retry field
需要在配置重試字段中找到值
And reread dump
并重讀dump

Need repeat this operation for all chips and banks
需要對所有芯片和banks重復此操作

Options選項

Combine 結(jié)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
計算統(tǒng)計信息僅適用于主dump中的紅色扇區(qū)。 所以，它將顯示使用什么重試值以使dump在紅色位置更好
To find Retry Value for first read use Combine = Off
要查找重試值首次閱讀使用Combine = Off
To find Retry Value for second read use Combine = On
要找到第二次讀取的重試值Combine = On

If ECC map is still not perfect
如果ECC位圖仍然不完美

Make Test Retry with option “Combine” = On
使用選項”Combine” = On測試重試
It will count only sectors with red ECC
它只會計數(shù)紅色ECC的扇區(qū)
If found good Retry value, read new dumps in temporary folder
如果找到好的重試值，請在臨時文件夾中讀取新的dumps
Open dumps in main folder, and make ECC Combine
在主文件夾中打開dumps，并進行ECC組合
Read about it here: ECC
關(guān)于讀取:ECC

轉(zhuǎn)載請注明：成都千喜數(shù)據(jù)恢復中心 » Flash Extractor用戶手冊-讀取重試