Fwd: mdadm format for manual destriping

[Marek <mlf.conv@gmail.com>]

I have found the following link which answers question 1.
But there's more stuff that's seems undocumented
https://raid.wiki.kernel.org/index.php/RAID_superblock_formats
Question 2
Does the superblock of size 256+2 start at 0?
Does the first block start immediately after 258 bytes?
Also question 3,4,5

Marek

On Saturday, October 24, 2015, Marek <mlf.conv@gmail.com> wrote:
>
> Hi,
>
> is there a documentation available on how mdadm stores data? E.g.
> 1.  super-block
> 2.  offset of first block on each drive
> 3. whether mdadm stores blocks as raw data or stores some kind of
> metadata associated with each block e.g. disk 1 -> data_block1
> immidiatelly followed by data_block 5 or
> metadata_for_block_1 | data_block 1 |  metadata_for_block_5 | data_block 5 |
> 4. how and where mdadm stores its backup superblock
> 5. what klind of XOR algorithm is used by mdadm
>
> thanks,
>
> Marek