> The problem is that the raid1 implementation may freely choose which leg > to read from. If it chooses to read from the non-corrupted leg, the > corruption is not detected,
which is why man invented ZFS. :) I don't know what the probability 10^-X is of silent mismatch between halves of a mirror, but it's a fatal weakness IMO of pretty much every RAID scheme out there that doesn't checksum each block be it at the "disk sector" (512/4k) or "filesystem" (4k). Would it make sense for LVM since it's a shim between disk device and filesystems to implement its own checksum scheme? Maybe do it at a "LVM page" notion of 32 disk sectors followed by a couple of extra disk sectors in which the checksum for each of the preceding 32 is strung together in one packed value? /spit-ball The *best* answer is for everyone to move to 520/528 byte sectors like serious storage vendors did 50 years ago, but I suspect that would be harder to get past the gatekeepers than drivers written in RUST.
