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Read Retry
Read Retry is a command that can be sent to memory chip before reading
It can improve quality of ECC map

Some chips have this command, some not.
Command can be different for different chips

To use Retry command fill Retry field in config
And reread chip



Sandisk is command type name
10 is retry value

There is different command type names for different chips
Each type have different possible value range
With different values you will have different result

Each chip and each bank of same chip can have different Retry value

Best Retry Value

To find best Retry Value you can use "Test Retry" function at mix editor



- Insert chip in reader
- Select chip and bank at mix editor
- Select worst place on ECC map
- Do not select start of dump on ECC map
- Run this funcion

If chip config have predefined retry value, use it for test
If not, you can try all retry command from list



Function will check all possible Retry values with this command
And show best value

Example:
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
Need copy found value in config Retry field
And reread dump

Need repeat this operation for all chips and banks



Options

Combine:
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
To find Retry Value for first read use Combine = Off
To find Retry Value for second read use Combine = On




If ECC map is still not perfect

Make Test Retry with option "Combine" = On
It will count only sectors with red ECC
If found good Retry value, read new dumps in temporary folder
Open dumps in main folder, and make ECC Combine
Read about it here: ECC
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