Re: first block in ext3 filesystem

[Manish Katiyar <mkatiyar@xxxxxxxxx>]

On Mon, Aug 6, 2012 at 11:04 AM, Prashant Shah <pshah.mumbai@xxxxxxxxx> wrote:

Hi,

I came across this

$sudo dumpe2fs /dev/sda1

4KB Block Size
Group 0: (Blocks 0-32767)
  Primary superblock at 0, Group descriptors at 1-1

1KB Block Size
Group 0: (Blocks 1-8192)
  Primary superblock at 1, Group descriptors at 2-2

Why does first block start from 0 in the 4KB block size partition and
1 in 1KB block size partition ?

Let's say superblock is always written at a fixed offset of 1024 (they have to because e2fsck has to find it) in the filesystem. What would be the block numbers with block sizes 1k and 4k ?

 

Regards.

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-- 
Thanks -
Manish

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