booting NetBSD on verdex

[Arthur Accroc <arthur.accroc1%gmail.com@localhost>]

Hello,
i'm trying to use NetBSD on gumstix (verdex, netwifimicrosd),
when booting i got the following error :
...
pxamci0: couldn't start dma xfer. (error=14)
ld0f: error writing fsbn 16 of 16-19 ...
ld0f: error writing fsbn ...
...

i've make a fsck_ffs of ld0f and nothing is wrong on it, i've
re-formatted the microSD card (2G), but same issue.

Could you help me to find the cause of this trouble ?
thanks
Arthur :)