Re: Is my data checksummed?

[Ric Wheeler <rwheeler@xxxxxxxxxx>]

On 02/21/2010 09:41 PM, tytso@xxxxxxx wrote:
> On Fri, Feb 19, 2010 at 08:15:30PM -0800, Reza Roboubi wrote:
>    
> > What checksumming is done for the actual data?  I know that storage
> > devices often do their own checksumming too, but how can I be sure
> > my data is integrity checked every time I read it?
> >      
> If you use disks that support the Data Integrity Field (DIF)
> extension, Linux will use it to provide end-to-end data checksum
> support.  Otherwise, there are checksums on the disk and between disk
> controller and the CPU, but those are obviously not end-to-end
> checksums.
>    

Just to be clear, even with a storage path that supports DIF/DIX, we 
don't currently do anything for applications on top of file systems. The 
primary application to target storage path is covered mainly for raw 
devices.

ric

> Adding data-level checksums is not something that we are planning on
> adding to the ext2/3/4 file systems.  BTRFS is the only file system
> that has data-level checksums, but it's not yet production ready.
>
> Best regards,
>
> 					- Ted
>
> _______________________________________________
> Ext3-users mailing list
> Ext3-users@xxxxxxxxxx
> https://www.redhat.com/mailman/listinfo/ext3-users
>    

_______________________________________________
Ext3-users mailing list
Ext3-users@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/ext3-users