Re: Stress testing a Pi...

On 10/05/2024 18:10, Dr. What wrote:

-=> The Natural Philosopher wrote to All <=-
   TNP> And I think I can confirm that a Pi4 cannot drive three SSDs over USB
  TNP> unaided.
 I found that out a long time ago when I set up my Raspberry PI4 based NAS.
   TNP> My tentative conclusion, which I would like some opinion on, is that it
  TNP> is the USB power limit that is causing the problems, not the overall
  TNP> power draw. As that would have bee relieved by removing the TV hat.
 It's the power draw.

That is ambiguous.
USB power draw or total power draw?

 On other Pi projects, I used multiple flash drives and had no problems.
 But my NAS project used 2.5" SATA drives with SATA-to-USB adapters - which will
certainly draw more power.  And I couldn't get more than one to work directly
connected.  I ended up getting a powered USB hub for all 4 drives in my NAS.
 

Two work OK here.  Just not three.
Remember all drives are not created equal consumption wise.

 ... I tried to drown my sorrows, but they can swim.
___ MultiMail/Linux v0.52
 

--
“It is dangerous to be right in matters on which the established authorities are wrong.”
― Voltaire, The Age of Louis XIV