Hello all !
3 years later ... I did the upgrade !
-> Archos Jukebox Recorder 20 V1 / SN : 022107794
-> Rockbox 3.13
-> Hardware Info : ROM: 1.28 / Mask: 0x0302 / Flash: M=BF D=D6 / Boot ROM: V1
CF Card : Kingston CF/32GB-U2 Carte CompactFlash Ultimate 266x - 32 Go
(Amazon.fr :
http://www.amazon.fr/gp/product/B002RCQ0SU)
IDE -> Compact Flash adapter : Dexlan Adaptateur SSD IDE pour 2 Compact Flash Maitre et Esclave 2.5"
(Amazon.fr :
http://www.amazon.fr/gp/product/B002QWDKFW)
There is also a Dexlan adapter with only one Master slot.
1- Format the CF card in FAT-32 using a CF card USB adapter (I'm using a Mac)
2- Copy the existing files of the JBR 20 to the CF card (including the hidden folders and files, I had to make it visible with Onyx utility software)
3- Disassemble the JBR 20, take out the HDD (Hitachi DK23DA-20F / SN ZGVB11MJ2U)
4- Install the CF card in the adapter (I used the Master slot, the Slave is working also)
5- Install the adapter and reassemble the JBR
6- Boot ... And it works perfectly, without having to deal with "UDMA" considerations or "fixed mode" and so on.
First attempt : perfect, and with power over USB !
See you !
VoronoV (from France)
Ps : I love you Rockbox team !