Re: Ghost Drive Letters on 6 node Exchagne cluster

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: Jason (jdheltne_at_sbcglobal.net)
Date: 04/19/04 

Date: Sun, 18 Apr 2004 21:51:14 -0500

Have you seen it cause any issues? We have Microsoft involved, including
them sending out to ROSS engineers on site, and they are saying "dont worry
about it". I worry because it is my production system that will be
suporting 8000 users email.

Jason

"Rodney R. Fournier [MVP]" <rod@die.spam.die.nw-america.com> wrote in
message news:%23l$WDuNJEHA.2652@TK2MSFTNGP12.phx.gbl...
> I have only seen this condition with bad firmware and drivers. NO fun!
>
> Rod
>
> "Jason" <jdheltne@sbcglobal.net> wrote in message
> news:ORLuPCLJEHA.1224@TK2MSFTNGP11.phx.gbl...
> > We have setup a 6 node Exchagne 2003 cluster for our users, and we have
> done
> > months of time in our test labs doing testing, and now that we are doing
> our
> > production build, we have ran into a quirk. What we had prevuiously
done
> is
> > test both QLogic 2300 HBAs with an IBM FasT SAN, and Emulex 9802 HBAs
with
> a
> > EMC Symmetric SAN. In both rounds of testing, we saw exactly what we
> should
> > regarding failover, when a disk resource is failed from node 1 to node
2,
> in
> > WIndows explorer you only see the disks that the node currently owned.
> Now,
> > we have had to replace our SAN with an EMC CLARiion CX600 SAN, and we
now
> > want to use VSS for backups via the EMC SIME product. For that reason we
> > ahve had to now switch to use the Emulex 9002 HBAs because according to
> EMC,
> > this is the only HBA that would support VSS. Anyway, since we have
> switched
> > to this HBA, we are now seeing the ghost drive letter issues where when
we
> > fail a disk resource from node 1 to node 2, the disk still shows up in
> > Windows Explorer, just with the name "Local Disk" and then a drive
letter.
> > The disk is not accessable from Windows Explorer. I have tried logging
> off
> > and back on both via terminal services and at the console, tried
> rescanning
> > the bus, etc... the only thing that makes the drive letter go away is a
> > reboot of the node. I can repeat this at will. We built everything
> exactly
> > like I should, had all nodes but node 1 off did all config from node 1,
> > etcx... then turned node 2 on, added it to the cluster, then node 3,
> etc....
> > Anyway, has anyone seen this issue and if so, is it causing you any
> issues?
> > I am leaning towards it being an HBA/driver/PNP subsystem issue, but it
> > concerns me because we did not see this when we did our previous
testing.
> >
> > thanks,
> >
> > Jason
> >
> >
>
>

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