Re: NAND flash and JFFS(2)

Thomas Gleixner
2002-02-13T11:27:19Z

On Tuesday, 12. February 2002 18:47, Thomas Gleixner wrote:
>
> Actual state of JFFS2 on NAND
>
> I will run some more tests tonight.
Excellent test result.

Test is as follows:

SmartMediaCard: 16MB two partitions a 8MB
1st partition is root
2nd partition is data

data contains 20 files, which are not touched.

3 tasks running in loops

task 1:
copy 40 files from root to data, remove the files on root
diff against original files on nfs
copy 40 files from data to root, remove the files on data
diff against original files on nfs
task 2:
open file A on data for write every 1 sec.
append 1000 bytes and close the file
loop until filesize is >1MB
open file B on data for write every 1 sec.
append 1000 bytes and close the file
loop until filesize is >1MB
task3:
wait until A is >1MB
copy file A to nfs
check file integrity of A
remove file A on data
wait until B is >1MB
copy file B to nfs
check file integrity of B
remove file B on data

A independent control removes power after ~ 1-2 hours without warning.
After reboot:
The untouched 20 files on data are diffed against the original files on nfs
The 40 files, which are shuffeld between root and data are diffed against
original files on nfs.
task1 starts
task2 takes the file, which was filled at last and starts
task3 starts

The test ran for 8 hours without any problem.