i don't try this.
But I specially install r29625 now again and do all that you suggested.
I do this:
1) install rockbox
Manufacturer: as3525
Version: r29625-110320
2) boot it and go to "System-Rockbox info"
See that HD1: not present (Although it is)
3) take out mSD from player
4) Put in mSD to player and go to "System-Rockbox info"
See that HD1: 56.3MB/14.9Gb
yahoo!
BUT then i reboot player and HD1 disappear again.
So strange, each time when turn on player i need to do "take out-put in" SD card from it.
It seems that automount of external flash not working at boot.
P.S. when I do this steps when rockbox info sreen is active - player hangs up.
i'm sorry my english isn't very well