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

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Date:	Mon, 23 Apr 2007 08:19:27 +0200
From:	DervishD <lkml@...vishd.net>
To:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Juergen Beisert <juergen127@...uzholzen.de>,
	linux-kernel@...r.kernel.org
Subject: Re: Wrong free clusters count on FAT32

    Hi Ogawa :)

 * OGAWA Hirofumi <hirofumi@...l.parknet.co.jp> dixit:
> DervishD <lkml@...vishd.net> writes:
> >> It would add the limitation to following simple usage,
> >> 
> >> 	# mount -t vfat /dev/sda1 /mnt
> >>         # cp -a * /mnt
> >>         # umount
> >> 
> >> if /dev/sda1 was the large and slow device, "mount" will need several
> >> minutes to counts free clusters. I think the user will be hard to
> >> accept the several minutes at "mount".
> >
> >     I can carry some tests, but if Windows does that tasks lightning
> > fast, Linux surely does it faster ;) I don't think, anyway, that having
> > a huge USB disk is a common practice when using "modest" machines.
> >
> >     If you want, I can perform a couple of tests. I have a 80GB disk
> > that I can connect using an USB adapter and my machine is AMD Athlon XP
> > 1900+ with 1GB of RAM, which looks pretty slow nowadays O:)
> 
> Yes, I think it's not common practice too. But I don't see why do you
> want to scanning at the mount.

    Just because I was thinking that, otherwise, the scanning would need
to be done at each statfs call, but I was wrong: once the scanning is
done and the count is right, it is written at free_clusters and used
afterwards.

    I thought the mount was the best point in time for doing this.

    Raúl Núñez de Arenas Coronado

-- 
Linux Registered User 88736 | http://www.dervishd.net
It's my PC and I'll cry if I want to... RAmen!
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