mismatch_cnt != 0, member content mismatch, but md says the mirror is good

[Tom Buskey]

On Tue, Feb 23, 2010 at 9:53 AM, Benjamin Scott <dragonhawk at gmail.com>wrote:

> On Tue, Feb 23, 2010 at 9:40 AM, Tom Buskey <tom at buskey.name> wrote:
> >>  ... patrol reads ...
> >
> > The correct terminology is a scrub.
>
>   Dell and LSI Logic call it "patrol read".
>
>  I believe I've seen Adaptec call it "consistency check", although
> that was a long time ago.
>
>  What makes your terminology more "correct" then them?  :-)
>

You've got me there.

I remember talking about & scheduling RAID scrubs in 1996 for a Micropolis
RAIDON SCSI raid and on a NetApp.  I think DEC Storageworks talked about
RAID scrubs for their systems in 1995.

Dell has some documentation (c) 1999 referring to scrubs on RAID
controllers.

This article on chosing a storage system:
http://www.information-management.com/issues/19971101/928-1.html from 1997
says to look for a storage unit featuring disk and scrubbing.

Scrubbing is also mentioned for ECC memory functions and I'd assume that's
where the RAID scrub comes from.

I think this is more of a jargon issue with scrub is generic for the brand
specific marketing names.  Like some network admins saying rowter and others
saying rooter for router.
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