[dba-Tech] SSD Pricing

[Gary Kjos]

It is my understanding the USB 3 can do approx 500MB per second.  SATA
3 can do approx 600 MB per second.  USB is only half duplex though and
so loses some time with ack replies

Read the last comment in this thread which has the math......

https://linustechtips.com/main/topic/798860-is-this-scary-sata3-vs-usb-30/
On Thu, Oct 11, 2018 at 2:19 PM Arthur Fuller <fuller.artful at gmail.com> wrote:
>
> Since you raised the topic, how does a USB 3.0 SSD compare with a similar
> device installed on the motherboard? Without evidence, I'm guessing that a
> USB-SSD would be substantially slower than an on-board SSD; but as
> mentioned, I have no evidence for that, one way or the other. You, on the
> other hand, seem to know all about this stuff, so I am requesting your
> expert advice.
>
> A.
>
> On Thu, Oct 11, 2018 at 10:46 AM John Colby <jwcolby at gmail.com> wrote:
>
> > You can clone the drive by mounting it via usb and running software.
> > SSDs tend to be low enough power to run via usb
> >
> >
> > On 10/7/2018 5:25 PM, Arthur Fuller wrote:
> > > Gary,
> > >
> > > Sound advice. Thanks.
> > >
> > > A.
> > >
> > > On Sun, Oct 7, 2018 at 8:53 PM Gary Kjos <garykjos at gmail.com> wrote:
> > >
> > >> $50 isn't a bad price for that.  You need to both drives mounted
> > >> somewhere.  SO you will need an open drive slot OR you would use an
> > >> external drive bay of some kind to attach  the drive to the computer
> > >> and then you would use software - the drive company would likely
> > >> provide the software to do the copy.  But you need to have both the
> > >> old and the new dirves in the same system somehow to do it.  And it
> > >> will take some time.  Half hour or an hour maybe.  It's certainly
> > >> doable on your own though.  I've not switched SSD to SSD but have
> > >> switched Rotating to rotating and rotating to SSD a few times and it's
> > >> not really hard.  Have to jump through some hoops most of us are not
> > >> used to.  Creating disk partitions and such.  Good to have a second
> > >> system available to investigate options as you go if you run into a
> > >> question but the system should be usable until you switch the cables
> > >> after the new drive is deemed ready to use.
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> > >
> >
> > --
> > John W. Colby
> >
> >
>
> --
> Arthur
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-- 
Gary Kjos
garykjos at gmail.com