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   LINUX      Torvalds farts & fans know what he ate      8,232 messages   

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   Message 5,901 of 8,232   
   Maurice Kinal to Benny Pedersen   
   JMS567 SATA 6Gb/s bridge & 64G msata TS6   
   21 Feb 19 21:57:11   
   
   Hej Benny!   
      
   Cutting and pasting for stats;   
      
   # writing to onboard uSD card using dd   
     dd if=/dev/zero of=test.dd bs=1M count=512   
     512+0 records in   
     512+0 records out   
     536870912 bytes (537 MB, 512 MiB) copied, 58.4449 s, 9.2 MB/s   
      
   # writing to usb connected msata using dd   
     dd if=/dev/zero of=test.dd bs=1M count=512   
     512+0 records in   
     512+0 records out   
     536870912 bytes (537 MB, 512 MiB) copied, 12.8056 s, 41.9 MB/s   
      
   # writing to usb connected 2.5" laptop drive using dd   
     dd if=/dev/zero of=test.dd bs=1M count=512   
     512+0 records in   
     512+0 records out   
     536870912 bytes (537 MB, 512 MiB) copied, 12.9187 s, 41.6 MB/s   
      
   Both the msata and the 2.5" laptop drive are 4 times faster than the uSD.    
   However it should be noted that there is an issue with the usb sata bridge   
   that states;   
      
   [  139.399549] usb 1-1.2: The driver for the USB controller dwc_otg_hcd does   
   not support scatter-gather which is   
   [  139.399569] usb 1-1.2: required by the UAS driver. Please try an other USB   
   controller if you wish to use UAS.   
      
   However it wasn't fatal as demonstrated by the dd write to the drive mounted   
   on the JMS567 SATA 6Gb/s bridge, but after witnessing this I will continue to   
   use the 2.5" laptop drive given that there are no such errors on there and the   
   results were just as good.  Hopefully newer raspberry pi's will ditch the uSD   
   interface and put on a msata or m.2 controller/interface in the future.  uSD's   
   should be left to crippled hardware as people who use those devices don't seem   
   to mind (over)paying for utter crap.  ;-)   
      
   I won't even mention the onboard wifi.  More useless crap that is a drain on   
   the system.  :::sigh:::   
      
   Anyhow, for the record, the same test on a usb3.0 interface;   
      
   # writing to usb3 connected msata using dd   
     dd if=/dev/zero of=test.dd bs=1M count=512   
     512+0 records in   
     512+0 records out   
     536870912 bytes (537 MB, 512 MiB) copied, 1.13874 s, 471 MB/s   
      
   MUCH BETTER!!!  :-)   
      
   Hopefully you'll have better results with the addon card.  One thing for sure   
   is that msata is a vast improvement over the onboard uSD and is worth the   
   extra investment.   
      
   Livet er godt,   
   Maurice   
      
   ... En Møøse slog engang min søster ...   
   --- GNU bash, version 5.0.2(1)-release (aarch64-raspi3b+-linux-gnu)   
    * Origin: Little Mikey's EuroPoint - Ladysmith BC, Canada (2:280/464.113)   

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