From: Lloyd Dieter (ldieter@SNRGY.COM)
Date: Tue Apr 22 2003 - 16:12:22 EDT
Interesting...so you set the path offline with "datapath set device X path
Y offline", disconnected and reconnected, and then the set it back online?
And it went active without rebooting?
-Lloyd
On Mon, 21 Apr 2003 19:11:45 -0400
Jeff Barratt <jbarratt@COMPSAT.COM> wrote:
> I have successfully replaced both failed switches and added new switch
> with SDD under AIX with no downtime. However, I didn't formally document
> the steps. I will do some testing in the lab in the next coupla days and
> provide the exact procedure necessary AFAIR: the link will fail back
> over if you have procedurally shut down the adapter via datapath set
> device # path # offline disconnected the switch and did whatever h/w
> swap is necessary(corePID needs to be the same),run datapath set device
> # path #
> online . I am certain I am missing a step or two(maybe rmdev -dl on the
> dead paths and a cfgmgr with the new switch in place?).
>
> -----Original Message-----
> From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
> Lloyd Dieter
> Sent: Wednesday, April 16, 2003 6:19 AM
> To: aix-l@Princeton.EDU
> Subject: Re: Switching the SAN switches.
>
>
> I agree about the reboot part...apparently, with SDD on AIX, the vpath
> will failover on the event of the loss of one link to the surviving
> link(s), but it will not "fail back" when the link is restored, unless
> you reboot.
>
> AIX seems to be the only platform (that I have seen) for which this is
> true.
>
> We ran into that, and thought it was something that we were doing wrong;
> spoke to one of the switch vendors, and they confirmed it.
>
> -Lloyd
>
>
> On Tue, 15 Apr 2003 16:29:17 +0200
> "Green, Simon" <Simon.Green@EU.ALTRIA.COM> wrote:
>
> > I don't have a lot of experience with this sort of thing, but the one
> > time I did it I had to reboot the server, and I also restarted the
> > tape library which was on the other end.
> >
> > My case might have been different. I was replacing an old FC Hub
> > which didn't work with a new FC Switch. (There was nothing actually
> > wrong with the hub, it just didn't work properly with AIX.)
> >
> > Simon Green
> > Altria ITSC Europe s.a.r.l.
> >
> > AIX-L Archive at http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2
> > AIX FAQ at http://www.faqs.org/faqs/aix-faq/
> >
> > N.B. Unsolicited email from vendors will not be appreciated.
> >
> > > -----Original Message-----
> > > From: Anthony F. Fiore [mailto:anthony.fiore@NYU.EDU]
> > > Sent: 15 April 2003 15:22
> > > To: aix-l@Princeton.EDU
> > > Subject: Switching the SAN switches.
> > >
> > >
> > > Good Day,
> > >
> > > We will soon be moving from one SAN switch to another which is
> > > attached to a few p660-6H1's on one side of the fabric and an
> > > ESS-F20 on
> > > the other. The 660's have FC 6227 adapters in them. If we're just
> > > replacing the SAN switch and not the Shark, or the Host...does
> > > anyone know of any gotcha's when replacing SAN switches?
> >
>
>
> --
> -----------------------------------------------------------------
> Lloyd Dieter - Senior Technology Consultant
> Registered Linux User 285528
> Synergy, Inc. http://www.synergyinc.cc ldieter@snrgy.com
> Main:585-389-1260 fax:585-389-1267
> SMS:5853292627@vtext.com
> -----------------------------------------------------------------
>
--
-----------------------------------------------------------------
Lloyd Dieter - Senior Technology Consultant
Registered Linux User 285528
Synergy, Inc. http://www.synergyinc.cc ldieter@snrgy.com
Main:585-389-1260 fax:585-389-1267
SMS:5853292627@vtext.com
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