Scrubbing is still preferable though, as normal reads won't cause every copy of the metadata to be read. Likewise, on a mirrored pair of disks, a given block of

Scrubbing is still preferable though, as normal reads won't cause every copy of the metadata to be read. Likewise, on a mirrored pair of disks, a given block of file content will only be read from one disk. (That is, since the file content is verified using checksums contained in the metadata, we don't need to read the file data back from both disks, so they can be used to service read requests independently of one another.)