Re: [patch] raid1: allow user to force reads from a specific disk

On Sunday August 6, 76306.1226@compuserve.com wrote:

Allow user to force raid1 to read all data from a given disk.
This lets users do integrity checking by comparing results
from reading different disks.  If at any time the system finds
it cannot read from the given disk it resets the disk number
to -1, the default, which means to balance reads.

Could say a little bit more about why you want this?

You could get nearly the same situation be setting the other drives to
write-mostly. 

And the more thorough integrity check is available via
   echo check > /sys/block/mdX/md/sync_action

NeilBrown