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

[Neil Brown]

On Sunday August 6, 76306.1226@xxxxxxxxxxxxxx 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
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