linux-kernel - Re: BTRFS partition usage...

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 12 Feb 2008 21:10:06 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	David Miller <davem@...emloft.net>
CC:	chris.mason@...cle.com, jengelh@...putergmbh.de,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	btrfs-devel@....oracle.com
Subject: Re: BTRFS partition usage...

David Miller wrote:
> From: Chris Mason <chris.mason@...cle.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/
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/