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ok, I did a full reset and now it works, so sorry about doing that before investigating more.
I guess it was a device error then!
to answer david :
- no extended driver
- It's a new behaviour, the calibre/reader used to works well
- I could access the drive after calibre close
- can't know the jobs calibre was doing : didn't watched that
- os is windows 7 x86
- no error messages
- device was working ok
To finish, I did install KSM and uninstalled it : maybe it comes from there.
Thanks guys
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