I checked each block for VFAT or cramFS image. Thanks to Mark for the hint.
In the following list I combiened my informations about the mtdblocks:
Mnt2: ??? contains the string "J-PRS-650" maybe the USB identifier and RSA Private key
Mnt4: CramFS image
Mnt10: CramFS image
Mnt12: VFAT:Sony transfer program installtion
Mnt13: VFAT:device configuration data ???
Mnt14: VFAT:The original installed media (Ebook,MP3...) Maybe for recovery
Mnt15: CramFS image
Mnt16: VFAT:internal useable space
Mnt17/18: SD card and memory stick
My objectives are:
Change the USB identifier to use the international Sony tools for firmware update and so on.
Install the international Dictionarys instead the japanease one.
Change the firmware to international one to use extentions like PRS+.
For the next step I have the following questions:
Why is the Firmware splitted in different images (Mnt4,10,15) ? Is one of them a kind of recovery image ? Do I need to replace them all ?
And where to get the Images ? Can sombody provided these blocks ?
I can provide the japanease version !
Best regards from Japan,