What is Data Assurance?

Data Assurance (DA) checks for and corrects errors that might occur as data is communicated between the Controllers and Drives on a Storage Array. DA capabilities are presented at the pool and volume group level.

The Data Assurance (DA) feature increases data integrity between the Controllers and Drives in a Storage Array. DA enables the storage array to check for errors that might occur when data is moved between the controllers and the drives. When this feature is enabled, the storage array appends error-checking codes (also known as cyclic redundancy checks or CRCs) to each block of data in the volume. After a data block is moved, the storage array uses these CRC codes to determine if any errors occurred during transmission. Potentially corrupted data is not written to the disks.