first block in ext3 filesystem

[Manish Katiyar]

On Mon, Aug 6, 2012 at 11:04 AM, Prashant Shah <pshah.mumbai at gmail.com>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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