From: Jeff Garzik <jeff@garzik.org>
To: David Miller <davem@davemloft.net>
Cc: chris.mason@oracle.com, jengelh@computergmbh.de,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
btrfs-devel@oss.oracle.com
Subject: Re: BTRFS partition usage...
Date: Tue, 12 Feb 2008 21:10:06 -0500 [thread overview]
Message-ID: <47B2517E.3080606@garzik.org> (raw)
In-Reply-To: <20080212.153329.98384016.davem@davemloft.net>
David Miller wrote:
> From: Chris Mason <chris.mason@oracle.com>
> Date: Tue, 12 Feb 2008 09:08:59 -0500
>
>> I've had requests to move the super down to 64k to make room for
>> bootloaders, which may not matter for sparc, but I don't really plan
>> on different locations for different arches.
>
> The Sun disk label sits in the first 512 bytes and the boot loader
> block sits in the second 512 bytes.
>
> I think leaving even more space is a good idea for several reasons.
Yep. I chose 32K unused space in the prototype filesystem I wrote [1,
2.4 era]. I'm pretty sure I got that number from some other filesystem,
maybe even some NTFS incarnation. It's just good practice to avoid the
first and last "chunks" of a partition, FSVO chunk.
Jeff
[1] http://kernel.org/pub/linux/kernel/people/jgarzik/ibu/
next prev parent reply other threads:[~2008-02-13 2:10 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-06 17:00 [ANNOUNCE] Btrfs v0.12 released Chris Mason
2008-02-11 1:12 ` David Miller
2008-02-11 13:42 ` Chris Mason
2008-02-12 6:43 ` David Miller
2008-02-12 13:43 ` Chris Mason
2008-02-12 7:21 ` BTRFS partition usage David Miller
2008-02-12 8:11 ` David Miller
2008-02-12 13:49 ` Chris Mason
2008-02-12 14:00 ` Jan Engelhardt
2008-02-12 14:08 ` Chris Mason
2008-02-12 14:21 ` Jan Engelhardt
2008-02-12 14:35 ` Chris Mason
2008-02-12 14:35 ` Chris Mason
2008-02-12 15:04 ` Jan Engelhardt
2008-02-12 16:17 ` Chris Mason
2008-02-12 23:38 ` David Miller
2008-02-12 23:42 ` Jan Engelhardt
2008-02-13 1:09 ` David Miller
2008-02-13 1:22 ` Rene Herman
2008-02-12 23:35 ` David Miller
2008-02-13 7:02 ` Christoph Hellwig
2008-02-12 23:34 ` David Miller
2008-02-12 23:33 ` David Miller
2008-02-13 2:10 ` Jeff Garzik [this message]
2008-02-14 0:51 ` Szabolcs Szakacsits
2008-02-12 23:26 ` David Miller
2008-02-12 23:39 ` Jan Engelhardt
2008-02-13 1:08 ` David Miller
2008-02-13 1:25 ` Bryan Henderson
2008-02-12 23:28 ` David Miller
2008-02-13 0:45 ` Theodore Tso
2008-02-12 20:50 ` David Miller
2008-02-12 9:23 ` CRC32C big endian bugs David Miller
2008-02-12 21:55 ` BTRFS only works with PAGE_SIZE <= 4K David Miller
2008-02-12 22:03 ` Chris Mason
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