From: "Anthony Chee" <anthony.chee@polyu.edu.hk>
Subject: File size and block size
Date: Thu, 18 Apr 2002 05:36:44 +0800
Sender: linux-fsdevel-owner@vger.kernel.org
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To: <linux-fsdevel@vger.kernel.org>

Dear all,

        The block size of my disk partition is 1024. I did the following
test,

        1. Copy a file with 3312 bytes to the target disk, it should occupy
3312/1024 = 3.2 = 4 blocks by calculation. And I use "df" to check that it
also occupy 4 blocks

        2. Copy a file with 34024 bytes to the target disk, it should occupy
34024/1024 = 33.2 = 34 blocks. But I found that it occupied 35 blocks

        3. Copy a file with 5693440 bytes to the target disk, it should
occupy 5693440/1024 = 5560 blocks. But it is shown that it occupied 5573
blocks by using "df"

        Why there is a difference by calculation and using "df"? How to
check that what is the actual number of blocks that a file will occupy
before copying?

Thanks,
Regards,
Anthony