08-10-2012
For frequently-modified files, it's rational. I have a set of text files that gets appended to frequently, and if they had more blocks reserved for them at a time, they'd fragment less than they do. If I found a straightforward way to change that without reformatting the FS I would.
Also, like said, it may have been larger in the past, and the extra blocks got kept in case the file becomes large again.
The other thing is, it may not be going by the I/O block here.
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STAT(1) User Commands STAT(1)
NAME
stat - display file or file system status
SYNOPSIS
stat [OPTION]... FILE...
DESCRIPTION
Display file or file system status.
-L, --dereference
follow links
-f, --file-system
display file system status instead of file status
-c --format=FORMAT
use the specified FORMAT instead of the default; output a newline after each use of FORMAT
--printf=FORMAT
like --format, but interpret backslash escapes, and do not output a mandatory trailing newline. If you want a newline, include
in FORMAT.
-t, --terse
print the information in terse form
--help display this help and exit
--version
output version information and exit
The valid format sequences for files (without --file-system):
%a Access rights in octal
%A Access rights in human readable form
%b Number of blocks allocated (see %B)
%B The size in bytes of each block reported by %b
%C SELinux security context string
%d Device number in decimal
%D Device number in hex
%f Raw mode in hex
%F File type
%g Group ID of owner
%G Group name of owner
%h Number of hard links
%i Inode number
%n File name
%N Quoted file name with dereference if symbolic link
%o I/O block size
%s Total size, in bytes
%t Major device type in hex
%T Minor device type in hex
%u User ID of owner
%U User name of owner
%x Time of last access
%X Time of last access as seconds since Epoch
%y Time of last modification
%Y Time of last modification as seconds since Epoch
%z Time of last change
%Z Time of last change as seconds since Epoch
Valid format sequences for file systems:
%a Free blocks available to non-superuser
%b Total data blocks in file system
%c Total file nodes in file system
%d Free file nodes in file system
%f Free blocks in file system
%C SELinux security context string
%i File System ID in hex
%l Maximum length of filenames
%n File name
%s Block size (for faster transfers)
%S Fundamental block size (for block counts)
%t Type in hex
%T Type in human readable form
NOTE: your shell may have its own version of stat, which usually supersedes the version described here. Please refer to your shell's docu-
mentation for details about the options it supports.
AUTHOR
Written by Michael Meskes.
REPORTING BUGS
Report stat bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
COPYRIGHT
Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
stat(2)
The full documentation for stat is maintained as a Texinfo manual. If the info and stat programs are properly installed at your site, the
command
info coreutils 'stat invocation'
should give you access to the complete manual.
GNU coreutils 7.1 July 2010 STAT(1)