Re: usb3 sticks do not seem to work properly.

From	Mike Easter <MikeE@ster.invalid>
Newsgroups	alt.os.linux.mageia, alt.os.linux
Subject	Re: usb3 sticks do not seem to work properly.
Date	2019-02-11 08:56 -0800
Message-ID	<gcdnphFlhvkU1@mid.individual.net> (permalink)
References	<q3s8lo$5f6$2@dont-email.me>

Cross-posted to 2 groups.

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William Unruh wrote:
> I am trying to install Mageia onto usb sticks, both usb2 and usb3
> sticks.
> I am installing by doing
> dd if=Mageia-7-cauldron-x86_64.iso of=/dev/sdb bs=1M status=progress
> and both usb2 and usb3 take a long time to install. Both start of fast,
> but finally settle down to 10MB/s writing, so the writing takes almost
> an hour. I thought usb3 was supposed to be fast. This is the same on my
> laptop  (which has usb3 ports and MGA6) and the new desktop( Ubuntu 18).
> The big problem is that when I want to check tha tthe writing has
> worked, I do
> md5sum /dev/sda
> and it takes about 1/2 hour to check the 4GB content of the stick, and
> persistantly, whether I used usb2 or usb4 sticks, the check sum is NOT
> the same as original file.  The sticks all have plenty of room ( they
> are either 16 or 32GB sticks) Furthermore the checksum changes if I run
> md5sum again on the same stick with nothing done to it.
> I might suspect a bad usb stick, but this has now been
> true for four different sticks, two usb3 and two usb2. I once got the
> correct checksum, but after 9 tries that was the only one. This is a bit
> absurd. What in the world could be going on here? Am I doing something
> wrong?
> 
> Why is it taking so long to write to usb 3 sticks.
> Why is the checksum persistantly wrong and changing on successive checks
> on the same stick?

I don't know the answers to your questions, but I'll share with you my 
experiences from trying to install to USB 2.

It was difficult.  Once Pascal Hambourg  helped me tweak it to get it to 
boot, I discovered the USB was full of errors.

After I fixed all of those errors with fsck, the USB was very slow to 
boot and run compared to a USB 2 rigged to boot live with persistence 
and run in ram.

I decided that the install to USB was not a good idea for my goals 
compared to live with persistence and ram run.  The tool I used to live 
with persistence run in ram was mkusb which uses dd under the hood.  The 
tool I used to install to USB was the Ubuntu Ubiquity installer which 
performed poorly for me to install to USB.  The distro in all the above 
cases was Ubuntu Mate 18.04.

-- 
Mike Easter

Thread

usb3 sticks do not seem to work properly. William Unruh <unruh@invalid.ca> - 2019-02-11 16:42 +0000
  Re: usb3 sticks do not seem to work properly. Mike Easter <MikeE@ster.invalid> - 2019-02-11 08:56 -0800
  Re: usb3 sticks do not seem to work properly. Richard Kettlewell <invalid@invalid.invalid> - 2019-02-11 18:50 +0000
    Re: usb3 sticks do not seem to work properly. William Unruh <unruh@invalid.ca> - 2019-02-11 22:45 +0000
      Re: usb3 sticks do not seem to work properly. Jasen Betts <jasen@xnet.co.nz> - 2019-02-12 01:59 +0000
      Re: usb3 sticks do not seem to work properly. Richard Kettlewell <invalid@invalid.invalid> - 2019-02-12 08:45 +0000
        Re: usb3 sticks do not seem to work properly. Paul <nospam@needed.invalid> - 2019-02-12 05:50 -0500
        Re: usb3 sticks do not seem to work properly. William Unruh <unruh@invalid.ca> - 2019-02-12 16:03 +0000
          Re: usb3 sticks do not seem to work properly. Bit Twister <BitTwister@mouse-potato.com> - 2019-02-12 10:20 -0600
            Re: usb3 sticks do not seem to work properly. Peter Pearson <pkpearson@nowhere.invalid> - 2019-02-12 17:55 +0000
          Re: usb3 sticks do not seem to work properly. "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2019-02-12 13:56 -0500
            Re: usb3 sticks do not seem to work properly. Richard Kettlewell <invalid@invalid.invalid> - 2019-02-12 19:18 +0000
              Re: usb3 sticks do not seem to work properly. "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2019-02-12 14:59 -0500
          Re: usb3 sticks do not seem to work properly. Richard Kettlewell <invalid@invalid.invalid> - 2019-02-12 19:15 +0000
  Re: usb3 sticks do not seem to work properly. Wes Newell <w.newell@tx.rr.com> - 2019-02-11 20:27 +0000
  Re: usb3 sticks do not seem to work properly. "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2019-02-11 15:32 -0500
    Re: usb3 sticks do not seem to work properly. faeychild <faeychild@afraid.org> - 2019-02-12 08:32 +1100
    Re: usb3 sticks do not seem to work properly. William Unruh <unruh@invalid.ca> - 2019-02-11 22:49 +0000
      Re: usb3 sticks do not seem to work properly. "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2019-02-11 21:49 -0500
        Re: usb3 sticks do not seem to work properly. Paul <nospam@needed.invalid> - 2019-02-11 22:15 -0500
    Re: usb3 sticks do not seem to work properly. Jasen Betts <jasen@xnet.co.nz> - 2019-02-12 02:03 +0000
      Re: usb3 sticks do not seem to work properly. "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2019-02-11 22:15 -0500
        Re: usb3 sticks do not seem to work properly. "Carlos E.R." <robin_listas@es.invalid> - 2019-02-12 05:22 +0100
  Re: usb3 sticks do not seem to work properly. "Carlos E. R." <robin_listas@es.invalid> - 2019-02-11 22:28 +0100
  Re: usb3 sticks do not seem to work properly. Paul <nospam@needed.invalid> - 2019-02-11 18:52 -0500
    Re: usb3 sticks do not seem to work properly. ant@zimage.comANT (Ant) - 2019-02-11 21:47 -0600
      Re: usb3 sticks do not seem to work properly. William Unruh <unruh@invalid.ca> - 2019-02-12 04:22 +0000
        Re: usb3 sticks do not seem to work properly. "Carlos E. R." <robin_listas@es.invalid> - 2019-02-12 21:40 +0100
      Re: usb3 sticks do not seem to work properly. "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2019-02-11 23:29 -0500
        Re: usb3 sticks do not seem to work properly. Doug Laidlaw <laidlaws@hotkey.net.au> - 2019-02-13 06:40 +1100
          Re: usb3 sticks do not seem to work properly. Doug Laidlaw <laidlaws@hotkey.net.au> - 2019-02-14 03:01 +1100
            Re: usb3 sticks do not seem to work properly. "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2019-02-13 23:24 -0500
  Re: usb3 sticks do not seem to work properly. Jasen Betts <jasen@xnet.co.nz> - 2019-02-12 01:50 +0000

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