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From: Jan Engelhardt <jengelh@computergmbh.de>
To: David Miller <davem@davemloft.net>
Cc: chris.mason@oracle.com, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, btrfs-devel@oss.oracle.com
Subject: Re: BTRFS partition usage...
Date: Wed, 13 Feb 2008 00:42:56 +0100 (CET)	[thread overview]
Message-ID: <Pine.LNX.4.64.0802130040350.14275@fbirervta.pbzchgretzou.qr> (raw)
In-Reply-To: <20080212.153836.166202106.davem@davemloft.net>


On Feb 12 2008 15:38, David Miller wrote:
>
>> I still don't like the idea of btrfs trying to be smarter than a user
>> who can partition up his system according to
>> 	(a) his likes
>> 	(b) system or hardware requirements or recommendations
>> to align the superblock to a specific location.
>
>All of your beliefs are unfortunately without the understanding
>of restrictions that exist in several partition layouts such
>as the Sun disk label one.

(Time for Sun to switch!)

>You have to start the superblock somewhere other than zero or
>else you lose a huge chunk of your disk, and furthermore a
>zero based partition is what all of the Sun disk label
>creating programs make by default.
>
>"I make a default disk label, I put btrfs or XFS on there, my disk
> label is gone."
>
>Real intuitive.
>

x86 MSDOS partition table layout starts counting with sector 1, which
is (not so intuitively) starting at 0x7e00 (and there's no sector 0,
probably for safety). Well, each ptable format with its own quirks.

  reply	other threads:[~2008-02-12 23:43 UTC|newest]

Thread overview: 34+ 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 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 [this message]
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
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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