Last week NetApp announced that it was the only company which is fully complient with Oracle’s HARD-Initiative for the prevention of data corrution on NFS, FCP, and iSCSI protocols with its Snapvalidator software.
This software validates a checksum which Oracle created for a buffer before it started writing it to disk. If the checksum of the block which NetApp is to write to the storage is not the same than the one Oracle has produced Snapvalidator creates an error message and prevents the data from being written to the storage.
Only with such a check we can be sure that exactly what we sent from the buffer cache is what arrives on disk in the end.
Let’s test it!