[maemo-users] Hangs writing to SDHC?

[From: David Hagood]

Over the past couple of days, my N800 has developed a problem writing to
one of the two 8 gig SDHC cards I have in it (the external card).

I can format the card and all is well, but as soon as I try to write any
significant amount of data to the card, the writing process will block
and never unblock. Indicated CPU will go to 100%. SSH'ing in and running
a "sync" will cause the sync command to block forever.
Tailing /var/log/syslog and/or running dmesg shows no unusual warning
messages.

Does anybody have any good suggestions for where to go from here?