linux-kernel - Re: Wrong free clusters count on FAT32

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Date:	Mon, 23 Apr 2007 02:44:59 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	7eggert@....de
Cc:	DervishD <lkml@...vishd.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Juergen Beisert <juergen127@...uzholzen.de>,
	linux-kernel@...r.kernel.org
Subject: Re: Wrong free clusters count on FAT32

Bodo Eggert <7eggert@....de> writes:

> # /usr/bin/time sh -c "dd if=/dev/hda2 bs=$((77834925/64)) count=4 | perl -e
> '"'use POSIX;while (sysread STDIN,$x,4) {$n++ if $x eq "\0\0\0\0"} print
> $n*32,"\n"'\'
> 4+0 records in
> 4+0 records out
> 13954720
> 0.76user 0.60system 0:01.95elapsed 69%CPU (0avgtext+0avgdata 0maxresident)k
> 0inputs+0outputs (8major+1583minor)pagefaults 0swaps

dd will use readahead, and I'm thinking about usb. Well, anyway,
recalc is default in new patch.

Thanks.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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