debian is installed OK, but I can't boot original pogoplug

I have a Seagate dockstar on which I successfully installed Debian on a USB flash drive about a year ago. It has been working fine and I haven't booted the original firmware in a long time. My impression from a year ago was that I could boot the original Pogoplug firmware just by removing the USB drive and resetting the power. That no longer seems to work. The good news is that at the time I set up netconsole and left in place so I can see what is going on.

Here is what happens when I try to force the Pogoplug boot:

Marvell>> run pogo_bootcmd
run pogo_bootcmd
### JFFS2 loading 'uboot-original-mtd0.kwb' to 0x800000
Scanning JFFS2 FS: ....... read_nand_cached: error reading nand off 0xded400 size 8192 bytes
.. done.
### JFFS2 load complete: 524288 bytes loaded to 0x800000
## Starting application at 0x00800200 ...

and it just hangs there forever. I don't know from the error message which part is failing. Is it the load of uboot-original-mtd0.kwb and from where would that occur? Could I have a failing nand partition?

I can still boot Debian from the USB drive, and I can manipulate the mtd partitions. I can see, for instance, that mtd2 still has the pogoplug filesystem. I also seem to have saved the original mtd partition contents which I could restore, but I would prefer not to.

Any ideas or suggestions would be welcome.

Eric

So it really seemed as if uboot was unable to read the uboot-original-mtd0.kwb file even though it was readable from the Debian system. While booted in Debian, I copied the files to my desktop, made them into a jffs2 image which I copied back to the Dockstar. I erased the mtd2 flash and then flashed the jffs2 image to it. The Dockstar now comes up in Pogoplug mode when I remove the USB drive and reset.

Eric