From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx2.redhat.com (mx2.redhat.com [10.255.15.25]) by int-mx2.corp.redhat.com (8.13.1/8.13.1) with ESMTP id kBMFp6gI019978 for ; Fri, 22 Dec 2006 10:51:07 -0500 Received: from wr-out-0506.google.com (wr-out-0506.google.com [64.233.184.233]) by mx2.redhat.com (8.12.11.20060308/8.12.11) with ESMTP id kBMFp4cu018554 for ; Fri, 22 Dec 2006 10:51:04 -0500 Received: by wr-out-0506.google.com with SMTP id 50so1435348wri for ; Fri, 22 Dec 2006 07:51:04 -0800 (PST) Message-ID: <859a78260612220751n3f0570abgdf4e865fabeb90d5@mail.gmail.com> Date: Fri, 22 Dec 2006 09:51:04 -0600 From: "Matt P" Subject: Re: [linux-lvm] Mirror between different SAN fabrics In-Reply-To: <2482337.1166623357215.JavaMail.mailer@post.ch> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_35851_481326.1166802664049" References: <2482337.1166623357215.JavaMail.mailer@post.ch> Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: To: LVM general discussion and development ------=_Part_35851_481326.1166802664049 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline I can't think of any Volume Manager that would let you mirror disks from 2 separate VGs... I know Veritas won't let you, unless they've changed something in the last version or 2... But other than that I wouldn't see why you couldn't use 2 different fabrics, they're just disks to LVM... If you're having trouble managing 200+ PVs, just build the LV first using only disks from 1 fabric, then make the second fabric available/visible, and add a mirror using only those disks... I think that would work... On 12/20/06, mathias.herzog@postfinance.ch wrote: > > Hi, > > Using lvm2, I would like to mirror a logical volume between two > different SAN fabrics to guarantee high availability for my data, even > if a whole SAN fabric crashes. > Is there a possibility in lvm2 to define two volume groups, put the > disks from fabric1 into group 1 and the disks from fabric2 into group 2 > and then create the mirror over the two groups? I didn't find much > documentation for lvm2 about this, I just know that other Volume > Managers can handle it. > > It's essential to group the discs together because I use like 100 discs > for each mirror and I have to be sure that mirroring takes place between > the two different SAN storages. > > Mathias > > > > Sicherheitshinweis: > Dieses E-Mail von PostFinance ist signiert. Weitere Informationen finden > Sie unter: > https://www.postfinance.ch/e-signature. > Geben Sie Ihre Sicherheitselemente niemals Dritten bekannt. > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > > > ------=_Part_35851_481326.1166802664049 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline I can't think of any Volume Manager that would let you mirror disks from 2 separate VGs... I know Veritas won't let you, unless they've changed something in the last version or 2... But other than that I wouldn't see why you couldn't use 2 different fabrics, they're just disks to LVM... If you're having trouble managing 200+ PVs, just build the LV first using only disks from 1 fabric, then make the second fabric available/visible, and add a mirror using only those disks... I think that would work...

On 12/20/06, mathias.herzog@postfinance.ch <mathias.herzog@postfinance.ch > wrote:
Hi,

Using lvm2, I would like to mirror a logical volume between two
different SAN fabrics to guarantee high availability for my data, even
if a whole SAN fabric crashes.
Is there a possibility in lvm2 to define two volume groups, put the
disks from fabric1 into group 1 and the disks from fabric2 into group 2
and then create the mirror over the two groups? I didn't find much
documentation for lvm2 about this, I just know that other Volume
Managers can handle it.

It's essential to group the discs together because I use like 100 discs
for each mirror and I have to be sure that mirroring takes place between
the two different SAN storages.

Mathias



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