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Re: Question: SSD speed

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On 10/8/2020 8:09 AM, Michael Stone wrote:
> On Thu, Oct 08, 2020 at 11:53:16AM +0200, Thomas Schmitt wrote:
>> Michael Stone wrote:
>>> > I'd assume it's confusion between bits and bytes. [...]
>>> > just write out bit or byte
>>
>> Andrei POPESCU wrote:
>>> SI prefixes can also help... if you use them consistently.
>>
>> It is a classic that programs talk mixed about GB and GiB while not 
>> clearly
>> distinguishing them. In general, users must keep the difference in 
>> mind when
>> they compare "GB" values from different programs.
>> See
>>  https://en.wikipedia.org/wiki/Mebibyte
> 
> This is basically never an issue in conversational usage as the 
> difference is less than the margin of error or real-world precision. If 

	I rather beg to differ.  Many daily operations involve precision better 
than the 2.4% variance between 1000 and 1024.  Certainly my bank account 
balance is maintained to within $.01 of more than $10,000, or 0.0001%. 
I would be fairly distressed if $240 were missing from my account.

	Much of the work I do involves tolerances of less than 1%.

> you're planning for a million dollars worth of storage, yeah, make sure 
> you're clear on what you're buying. But when discussing a 10Gbit/s 
> network or a 4TByte drive, there isn't ambiguity. (Only, potentially, 
> pedantry.)

	Well, what, really, is wrong with pedantry?  As an engineer, precision 
is absolutely of the essence.  What's more, variations become far 
tighter in certain circumstances.  This especially as a container nears 
being full.  If one has 1 MB of storage available (allowing for file 
system overhead and block alignment), then 1 MB of data will fit, but 1 
MiB will not.

	Not only that, but the discrepancy grows exponentially with the order 
of magnitude.  The difference between 1 KB and 1 KiB is only 24 bytes, 
or 2.4%.  The difference between 1 TB and 1 TiB is 9.9%, which is 
getting to be pretty significant.  That, not to mention the fact 93 GiB 
is a pretty good chunk of storage.

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Question: SSD speed Hans <hans.ullrich@loop.de> - 2020-10-07 10:50 +0200
  Re: Question: SSD speed Georgi Naplatanov <gosho@oles.biz> - 2020-10-07 11:40 +0200
  Re: Question: SSD speed Steve McIntyre <steve@einval.com> - 2020-10-07 12:00 +0200
  Re: Question: SSD speed "Jeremy Nicoll" <jn.ml.dbn.25@letterboxes.org> - 2020-10-07 12:00 +0200
    Re: Question: SSD speed Sven Hartge <sven@svenhartge.de> - 2020-10-07 12:50 +0200
      Re: Question: SSD speed Michael Stone <mstone@debian.org> - 2020-10-07 15:10 +0200
        Re: Question: SSD speed Andrei POPESCU <andreimpopescu@gmail.com> - 2020-10-08 11:00 +0200
          Re: Question: SSD speed "Thomas Schmitt" <scdbackup@gmx.net> - 2020-10-08 12:00 +0200
            [SOLVED] Re: Question: SSD speed Hans <hans.ullrich@loop.de> - 2020-10-08 12:20 +0200
            Re: Question: SSD speed Michael Stone <mstone@debian.org> - 2020-10-08 15:20 +0200
              Re: Question: SSD speed "Thomas Schmitt" <scdbackup@gmx.net> - 2020-10-08 16:00 +0200
                Re: Question: SSD speed Michael Stone <mstone@debian.org> - 2020-10-08 16:20 +0200
                Re: Question: SSD speed Stefan Monnier <monnier@iro.umontreal.ca> - 2020-10-08 17:40 +0200
                Re: Question: SSD speed Michael Stone <mstone@debian.org> - 2020-10-08 17:50 +0200
                Re: Question: SSD speed Stefan Monnier <monnier@iro.umontreal.ca> - 2020-10-08 18:00 +0200
              Re: Question: SSD speed Leslie Rhorer <lesrhorer@att.net> - 2020-10-08 20:30 +0200
                Re: Question: SSD speed Dan Ritter <dsr@randomstring.org> - 2020-10-08 20:40 +0200
                Re: Question: SSD speed Michael Stone <mstone@debian.org> - 2020-10-08 21:20 +0200
                Re: Question: SSD speed Leslie Rhorer <lesrhorer@att.net> - 2020-10-09 02:00 +0200
                Re: Question: SSD speed Michael Stone <mstone@debian.org> - 2020-10-09 02:20 +0200
                Re: Question: SSD speed Leslie Rhorer <lesrhorer@att.net> - 2020-10-09 02:40 +0200
                Re: Question: SSD speed Stefan Monnier <monnier@iro.umontreal.ca> - 2020-10-09 00:20 +0200
                Re: Question: SSD speed Leslie Rhorer <lesrhorer@att.net> - 2020-10-09 02:20 +0200
                Re: Question: SSD speed Stefan Monnier <monnier@iro.umontreal.ca> - 2020-10-09 15:50 +0200
    Re: Question: SSD speed Alberto Sentieri <22t@tripolho.com> - 2020-10-07 13:30 +0200
      Re: Question: SSD speed "Jeremy Nicoll" <jn.ml.dbn.25@letterboxes.org> - 2020-10-07 14:50 +0200
        Re: Question: SSD speed Andrei POPESCU <andreimpopescu@gmail.com> - 2020-10-08 10:50 +0200
    Re: Question: SSD speed Hans <hans.ullrich@loop.de> - 2020-10-07 18:50 +0200
      Re: Question: SSD speed "Jeremy Nicoll" <jn.ml.dbn.25@letterboxes.org> - 2020-10-07 18:50 +0200
      Re: Question: SSD speed Andy Smith <andy@strugglers.net> - 2020-10-07 19:50 +0200
        [SOLVED] Re: Question: SSD speed Hans <hans.ullrich@loop.de> - 2020-10-07 20:00 +0200
        [SOLVED] Re: Question: SSD speed Hans <hans.ullrich@loop.de> - 2020-10-08 09:10 +0200
  Re: Question: SSD speed Andrei POPESCU <andreimpopescu@gmail.com> - 2020-10-08 11:00 +0200

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