If a disk drive is set up with the jumper on that says don't spin up
with power-up, you can run into problems if the disk accidently loses
power and then gets powered back up.

The kernel doesn't power it back up.

After you pull the jumper and get it spinning, you can read the raw disk,
but a ccd (active file system) still can't access the drive... .

reboot, and fsck -f did not show any problems whatsoever.
Back to collecting tons of data, only losing 3 minutes worth of data.
(still a very fast reboot and fsck of a huge file system!)