"cannot mount root, error = 79"

[Kentaro KAWAMOTO <kentaro.kawamoto%gmail.com@localhost>]

Hi,

I have two NetBSD machines: one with NetBSD 5.99.16 (amd64), the other
with NetBSD 5.0.1 (i386).
I cross-compiled a new kernel on the amd64 machine for the i386,
and copy the binary (netbsd) to the i386 machine.

When booting with the new kernel, it printed the following message.
---
...
wd0 at atabus0 drive 0: <INTEL SSDSA2MH080G1HP>
wd0: drive supports 16-sector PIO transfers, LBA48 addressing
wd0: 76319 MB, 155061 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
wd0(piixide0:0:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using DMA)
Kernelized RAIDframe activated
pad0: outputs: 44100Hz, 16-bit, stereo
audio1 at pad0: half duplex
hpqlb0: registering on wskbd0
boot device: wd0
root on wd0a dumps on wd0b
no file system for wd0 (dev 0x0)
cannot mount root, error = 79
root device (default wd0a): ubt0 at uhub2 port 1
ubt0: Broadcom Corp HP Integrated Module, rev 2.00/1.00, addr 2

dump device (default wd0b):
---

Why does it fail to find a file system on wd0.
It must exist because it can boot with the older kernel (NetBSD 5.0.1).

I followed the instructions at
http://www.netbsd.org/docs/guide/en/chap-build.html

Thanks in advance.

-- 
Kentaro KAWAMOTO
kentaro.kawamoto%gmail.com@localhost