From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul Clements <paul.clements@steeleye.com>
Subject: Re: [PATCH md 006 of 6] Add write-behind support for md/raid1
Date: Fri, 12 Aug 2005 08:15:02 -0400
Message-ID: <42FC92C6.7060604@steeleye.com>
References: <20050811171720.10115.patches@notabene> <E1E37OV-0002jU-9q@notabene.cse.unsw.edu.au> <200508120922.52689.a1426z@gawab.com>
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To: Al Boldi <a1426z@gawab.com>
Cc: NeilBrown <neilb@cse.unsw.edu.au>, Andrew Morton <akpm@osdl.org>, linux-raid@vger.kernel.org
List-Id: linux-raid.ids

Al Boldi wrote:
> NeilBrown wrote:
> 
>>If a device is flagged 'WriteMostly' and the array has a bitmap,
>>and the bitmap superblock indicates that write_behind is allowed,
>>then write_behind is enabled for WriteMostly devices.
> 
> 
> Nice, but why is it dependent on WriteMostly?

WriteMostly is just a flag that tells us which devices will get the 
write-behinds, and which will not. You'll be able to mix any combination 
of WriteMostly devices and normal devices in a raid1.

--
Paul