From: tnp@invalid.invalid   
      
   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   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)