I've just learned that T10-PI/DIF for SAS drives is not the only kid on the block and that SATA crowd has their own implementation - T13.
With simplified features to match SATA implementation, but much the same principles - have each sector on the HDD have a small extension, where host/HBA can store sector hash and check it during the read.
This way, HOST can check for silent drive errors, when drive goes berserk and start spewing garbage without reporting an error, so RAID-5/6 corrective mechanisms never get triggered. And even if RAID-5/6 host knew there is an error, it couldn't correct it without knowing which drive has gone m/b/ad.
Hash check solves that at low level.
But I wonder how widely is T13 implemented.
Which SATA HDD lines support it ?
Which HBA and RAID cards support it ?
Can Linux OS work with it ?
Does Linux SW-raid support it ?