On 25 Aug 2019, at 21:45, Roger Dingledine <arma@torproject.org> wrote:

And as a last note, I think it's been a long time since anybody tuned
AvoidDiskWrites to have actually reasonable parameters. I wrote it long
ago as a potential feature that somebody might find useful, and I just
picked some numbers that seemed plausible back in 2007.

Since 2007, we've seen some significant technological changes:
* More devices with batteries
* More devices with SSDs
* Better disk forensics techniques

So it might be a good idea to change the client default to AvoidDiskWrites 1:
https://trac.torproject.org/projects/tor/ticket/31507

T