Is my data checksummed?

[Reza Roboubi]

Thanks a lot for all the responses.

Ric Wheeler wrote:
> On 02/21/2010 09:41 PM, tytso at mit.edu wrote:
>> 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.

Sorry Ric,

The last sentence loses me.  I mean, I know what raw devices are! :)
Would you please elaborate a little.

Reza.