GNU logs - #15056, boring messages

Message sent to bug-coreutils@HIDDEN:

Subject: bug#15056: Please indicate the meaning of block sizes in filesystem information
Resent-From: Filipus Klutiero <chealer@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-coreutils@HIDDEN
Resent-Date: Fri, 09 Aug 2013 04:36:02 +0000
Resent-Message-ID: <handler.15056.B.13760229453998 <at> debbugs.gnu.org>
Resent-Sender: help-debbugs@HIDDEN
To: 15056 <at> debbugs.gnu.org
Message-ID: <5204717E.1090606@HIDDEN>
Date: Fri, 09 Aug 2013 00:35:10 -0400
From: Filipus Klutiero <chealer@HIDDEN>
User-Agent: Mozilla/5.0 (X11; Linux i686 on x86_64;
 rv:10.0.12) Gecko/20130116 Icedove/10.0.12
MIME-Version: 1.0
Content-Type: multipart/alternative;
 boundary="------------010609090400020502060801"
Precedence: list
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>

This is a multi-part message in MIME format.
--------------010609090400020502060801
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Severity: wishlist

stat -f provides information on the filesystem, including block sizes:
> Block size: 4096       Fundamental block size: 4096
The unit used in unfortunately not specified. Considering the fdisk output I get...
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
... I guess bits are the unit.

Note that the first measure ("Block size") is quite ambiguous. http://www.hitachi.co.jp/Prod/comp/soft1/manual/jp1en/d3R4900e/PCAU0135.HTM has some block size terminology which might help (if that's indeed the type of block we mean):
> The basic block size (FFBS: Fundamental Filesystem Block Size) used in the field table of this record is the allocation unit used during file system creation. The number of blocks that corresponds to the basic block size is called the /basic block count/. The logical block size (PFBS: Preferred Filesystem Block Size) is the allocation unit used during input/output operations. The number of blocks that corresponds to the logical block size is called the /logical block count/.
-- 
Filipus Klutiero
http://www.philippecloutier.com


--------------010609090400020502060801
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

<html>
  <head>

    <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    Severity: wishlist<br>
    <br>
    stat -f provides information on the filesystem, including block
    sizes:<br>
    <blockquote type="cite">Block size: 4096&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Fundamental block
      size: 4096</blockquote>
    The unit used in unfortunately not specified. Considering the fdisk
    output I get...<br>
    <blockquote type="cite">Sector size (logical/physical): 512 bytes /
      512 bytes<br>
      I/O size (minimum/optimal): 512 bytes / 512 bytes<br>
    </blockquote>
    ... I guess bits are the unit.<br>
    <br>
    Note that the first measure ("Block size") is quite ambiguous.
    <a class="moz-txt-link-freetext" href="http://www.hitachi.co.jp/Prod/comp/soft1/manual/jp1en/d3R4900e/PCAU0135.HTM">http://www.hitachi.co.jp/Prod/comp/soft1/manual/jp1en/d3R4900e/PCAU0135.HTM</a>
    has some block size terminology which might help (if that's indeed
    the type of block we mean):<br>
    <blockquote type="cite">The basic block size (FFBS: Fundamental
      Filesystem Block Size) used in the field table of this record is
      the allocation unit used during file system creation. The number
      of blocks that corresponds to the basic block size is called the <font
        face="Times New Roman"><i>basic block count</i></font>. The
      logical block size (PFBS: Preferred Filesystem Block Size) is the
      allocation unit used during input/output operations. The number of
      blocks that corresponds to the logical block size is called the <font
        face="Times New Roman"><i>logical block count</i></font>.</blockquote>
    <pre class="moz-signature" cols="998">-- 
Filipus Klutiero
<a class="moz-txt-link-freetext" href="http://www.philippecloutier.com">http://www.philippecloutier.com</a></pre>
  </body>
</html>

--------------010609090400020502060801--

Message sent:

Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Mailer: MIME-tools 5.503 (Entity 5.503)
Content-Type: text/plain; charset=utf-8
X-Loop: help-debbugs@HIDDEN
From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Filipus Klutiero <chealer@HIDDEN>
Subject: bug#15056: Acknowledgement (Please indicate the meaning of block
 sizes in filesystem information)
Message-ID: <handler.15056.B.13760229453998.ack <at> debbugs.gnu.org>
References: <5204717E.1090606@HIDDEN>
X-Gnu-PR-Message: ack 15056
X-Gnu-PR-Package: coreutils
Reply-To: 15056 <at> debbugs.gnu.org
Date: Fri, 09 Aug 2013 04:36:02 +0000

Thank you for filing a new bug report with debbugs.gnu.org.

This is an automatically generated reply to let you know your message
has been received.

Your message is being forwarded to the package maintainers and other
interested parties for their attention; they will reply in due course.

Your message has been sent to the package maintainer(s):
 bug-coreutils@HIDDEN

If you wish to submit further information on this problem, please
send it to 15056 <at> debbugs.gnu.org.

Please do not send mail to help-debbugs@HIDDEN unless you wish
to report a problem with the Bug-tracking system.

--=20
15056: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D15056
GNU Bug Tracking System
Contact help-debbugs@HIDDEN with problems

Message sent to bug-coreutils@HIDDEN:

Subject: bug#15056: Please indicate the meaning of block sizes in filesystem information
Resent-From: =?UTF-8?Q?P=C3=A1draig?= Brady <P@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-coreutils@HIDDEN
Resent-Date: Fri, 09 Aug 2013 04:54:01 +0000
Resent-Message-ID: <handler.15056.B15056.13760240216203 <at> debbugs.gnu.org>
Resent-Sender: help-debbugs@HIDDEN
To: Filipus Klutiero <chealer@HIDDEN>
Cc: 15056 <at> debbugs.gnu.org
Message-ID: <520475CC.2050505@HIDDEN>
Date: Fri, 09 Aug 2013 05:53:32 +0100
From: =?UTF-8?Q?P=C3=A1draig?= Brady <P@HIDDEN>
User-Agent: Mozilla/5.0 (X11; Linux x86_64;
 rv:17.0) Gecko/20130110 Thunderbird/17.0.2
MIME-Version: 1.0
References: <5204717E.1090606@HIDDEN>
In-Reply-To: <5204717E.1090606@HIDDEN>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Precedence: list
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>

On 08/09/2013 05:35 AM, Filipus Klutiero wrote:
> Severity: wishlist
> 
> stat -f provides information on the filesystem, including block sizes:
>> Block size: 4096       Fundamental block size: 4096
> The unit used in unfortunately not specified. Considering the fdisk output I get...
>> Sector size (logical/physical): 512 bytes / 512 bytes
>> I/O size (minimum/optimal): 512 bytes / 512 bytes
> ... I guess bits are the unit.

always bytes

There are generally 3 layers of block sizes between the file system and device:

1. physical	defined by the hardware device
2. logical		the smallest addressable unit used for the device
3. file system	ditto for the file system

So your numbers above are not the same item being represented.
They're all in bytes and represent different values 1,2,3 above

thanks,
P�draig.

Last modified: Mon, 25 Nov 2019 12:00:02 UTC

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.