AW: RAID1 and data safety?

Neil Brown wrote:

quoted

quoted

Is there any way to tell MD to [...] and
read-from-all-disks on a RAID1 array?

Not sure why a checksum of X data blocks should be cheaper
performance-wise than a comparison between X data blocks, but I can
see the point in that you only have to load the data once and check
the checksum.  Not quite the same security, but almost.

Still, if there is different data on the two disks due to a previous 
power failure, the comparsion could really be the better choise, isn't it?