Originally posted by: przemolb
according to the following document [url="http://www.hds.com/pdf/wp_157_sata.pdf"]http://www.hds.com/pdf/wp_157_sata.pdf[/url] there is "Read-after-write Data Protection Mechanism" used in HDS arrays with SATA disks. It means that "controller keeps a copy of the original data in cache memory as it writes that data onto the disk. The controller then physically rereads that data into cache memory and uses ?Verify? byte check logic borrowed from the SCSI command set to make sure the correct data has been recorded."
Someone mentioned on this forum that there is a plan to release a new firmware which will let us turn the feature off (so server receives approval from storage when write request comes to cache). Is that true ? If so does anybody know release date of the firmware ?