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From: Damian Gerow <dgerow@afflictions.org>
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Subject: Re: ZFS checksum errors on umass(4) insertion
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John Baldwin wrote:
: > I'm at a bit of a loss as to what to test next, other than checking for an
: > increased number of checksum errors after unloading umass.  However, I'm not
: > convinced this is going to highlight the actual problem.  I'm all ears as to
: > what to test for at this point, as I'm running out of ideas.
: > 
: > A little less wordy: help?
: 
: Do your umass(4) drives use ZFS or some other filesystem?

Something in the FAT line, likely FAT32.  I use ZFS for everything but my
root filesystem (/usr, /var, /tmp, /home, and a few other non-default
mountpoints), but I stick with FAT for removable devices.

It's probably worth pointing out that I don't need to mount the filesystem
to trigger the issue.