From: Ming Zhang <mingz@ele.uri.edu>
To: Neil Brown <neilb@suse.de>
Cc: Rik Herrin <rikherrin@yahoo.com>, linux-raid@vger.kernel.org
Subject: Re: Controlling Reading and Writing in RAID 1 configuration
Date: Thu, 27 Apr 2006 18:38:16 -0400 [thread overview]
Message-ID: <1146177496.11547.147.camel@localhost.localdomain> (raw)
In-Reply-To: <17489.16385.884347.871210@cse.unsw.edu.au>
On Fri, 2006-04-28 at 08:04 +1000, Neil Brown wrote:
> On Tuesday April 25, rikherrin@yahoo.com wrote:
> > Hi,
> > I have a setup where I want to use RAID 1 to mirror
> > my data over the LAN. I am exposing 2x500 GB-sized
> > devices via iSCSI and was wondering if I could
> > configure the RAID 1 to write to both members of the
> > RAID 1 configuration but only read from one as one
only read from one disk, shall this be a "--read-preferred" ?
i checked email archive, but still not quite understand on this
"--write-mostly". for raid1, u anyway need to write all components, so
why there is a "mostly"?
> > link is 1GbE while the other is lower but sufficient
> > for writing. Is this possible? Thanks for your help.
>
> You'll be wanting the '--write-mostly' option to mdadm.
> This requires a fairly recent kernel and mdadm.
>
> NeilBrown
> -
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next prev parent reply other threads:[~2006-04-27 22:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-25 12:58 Controlling Reading and Writing in RAID 1 configuration Rik Herrin
2006-04-27 22:04 ` Neil Brown
2006-04-27 22:38 ` Ming Zhang [this message]
2006-04-27 23:06 ` Neil Brown
2006-04-28 1:31 ` Ming Zhang
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