[linux-lvm] LVM and multiple HBA ports

[Franc Carter]

Use mdadm to remove the 'failed' device and then add it back in
again (I don't have the mdadm manuals handy to look for the options
to do this, sorry)

On Mon, Apr 26, 2004 at 08:53:40AM -0700, Chris Croswhite wrote:
> How are you setting up the md device?  My issues is how to reclaim a
> failed path on the md device?  So I set mine up like this:
> 
> mdadm --create -f -l mp -n 1 x 1 /dev/md0 /dev/sdx /dev/sdy
> 
> (assuming x and y are the two paths into the one lun).
> 
> On testing fail over, it takes about 12s to fail over.  Checking the md
> device shows this, however, how does one re-enable the failed lun?
> 
> TIA
>  
> On Sun, 2004-04-25 at 18:14, Franc Carter wrote:
> > They way I have handled this is to use an md multipath device to combine the
> > two luns that are seen in to one md device, and then put lvm on top of
> > that.
> > 
> > Seems to work well - however testing 'real' failures rather than capable
> > pulling is somewhat more difficult/risky
> > 
> > On Wed, Apr 21, 2004 at 07:04:13PM +0300, Dan Bar Dov wrote:
> > > I have a problem using two (or more) ports connected to the same storage.
> > > 
> > > Linux does not identify that the two LUNs it discovers is actually the same.
> > > When I create a PV all is well. 
> > > The PV gets created and is ACTIVE. However, through the other port, the PV
> > > is also discovered, but is marked INACTIVE in the LVM database.
> > > 
> > > When I try to create a VG using the active path, LVM scans all PVs in order.
> > > If it finds the INACTIVE instance first, the VG creation fails.
> > > 
> > > I'm using LVM 1.0.3, please let mw know if such a situation (connecting
> > > storage through multiple ports) is handled better in another version, or
> > > suggest how to overcome the problem.
> > > 
> > > Thanks,
> > > Dan
> > > _______________________________________________
> > > linux-lvm mailing list
> > > linux-lvm at redhat.com
> > > https://www.redhat.com/mailman/listinfo/linux-lvm
> > > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm at redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

-- 
Franc Carter     Ph:61-2-8374-5071      Fax: 61-2-8374-5070
Systems Manager, SIRCA Ltd              http://www.sirca.org.au/

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