From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner+willy=40w.ods.org-S261682AbVEOP6x@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S261682AbVEOP6x (ORCPT <rfc822;willy@w.ods.org>);
	Sun, 15 May 2005 11:58:53 -0400
Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261683AbVEOP6x
	(ORCPT <rfc822;linux-kernel-outgoing>);
	Sun, 15 May 2005 11:58:53 -0400
Received: from ns9.hostinglmi.net ([213.194.149.146]:23464 "EHLO
	ns9.hostinglmi.net") by vger.kernel.org with ESMTP id S261682AbVEOP6v
	(ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Sun, 15 May 2005 11:58:51 -0400
Date: Sun, 15 May 2005 18:00:37 +0200
From: DervishD <lkml@dervishd.net>
To: Linux-kernel <linux-kernel@vger.kernel.org>
Subject: ext2 optimal partition size
Message-ID: <20050515160037.GE134@DervishD>
Mail-Followup-To: Linux-kernel <linux-kernel@vger.kernel.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
User-Agent: Mutt/1.4.2.1i
Organization: DervishD
X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
X-AntiAbuse: Primary Hostname - ns9.hostinglmi.net
X-AntiAbuse: Original Domain - vger.kernel.org
X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12]
X-AntiAbuse: Sender Address Domain - dervishd.net
X-Source: 
X-Source-Args: 
X-Source-Dir: 
Sender: linux-kernel-owner@vger.kernel.org
X-Mailing-List: linux-kernel@vger.kernel.org

    Hi all :)

    Let's assume I want to partition a hard disk so the partition
size is optimal for a given block size and bytes per inode ratio in
an ext2/ext3 filesystem. By 'optimal' I mean that no space in the
partition is wasted, that is, the metadata and the data blocks fit
perfectly in the partition, and no space is left unused because that
space is less than a data block.

    For example, if disk structures occupy 1024 bytes and each data
block is 1024 bytes too, the partition size must be a multiple of
1024: if I allocate 2049 bytes for the partition, then one byte will
be lost because ext2/3 cannot have blocks smaller than the block
size.

    So: which is the optimal partition size for a given block size
and a given bytes per inode ratio? Can it be easily calculated?

    Thanks a lot in advance :)

    Raúl Núñez de Arenas Coronado

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