Re: Three questions

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From: Tudor Cristea (TudorCristea_at_discussions.microsoft.com)
Date: 01/18/05 

Date: Tue, 18 Jan 2005 07:57:04 -0800

This is my experience too. Is this by design? If so, what can one use to keep
synchronised internal disks on Windows 2003?

"John Toner [MVP]" wrote:

> I believe that it does not allow the shadow copy "storage area" to be
> located on a remote location. The target has to be seen as a local volume on
> the host, as far as I can tell. I've tried setting this up using a network
> share or UNC path, but this does not appear to work.
>
> It is possible to place the target area on a SAN device and then snap off a
> mirror of the SAN device (assuming your hardware is capable of this).
>
> Regards,
> John
>
> "Tudor Cristea" <TudorCristea@discussions.microsoft.com> wrote in message
> news:2677D203-7931-4278-832D-CE3EFC1F2146@microsoft.com...
> > Can one have shadow copies enable of internal disks on different
> computers?
> > After reading the articles under the provided link, looks that would be
> > possible. When I'm trying it on my two nodes cluster the only thing I
> could
> > do is to enable the shadow copying between two internal disks on the same
> > computer. I'll be interested to have shadow copies between disks located
> on
> > different computers.
> >
> > Best regards,
> > Tudor Cristea
> >
> > "John Toner [MVP]" wrote:
> >
> > > Ok, I think you should read through the following:
> > >
> > >
> http://www.microsoft.com/resources/documentation/WindowsServ/2003/all/techref/en-us/w2k3tr_vss_how.asp
> > >
> > > VSS is available for any disk seen by the OS. VSS is not qualified for
> > > specific hardware vendors, though certain hardware (and application)
> vendors
> > > do have VSS providers specific to their storage.
> > >
> > > Hope this helps.
> > >
> > > Regards,
> > > John
> > >
> > >
> > > "Tudor Cristea" <TudorCristea@discussions.microsoft.com> wrote in
> message
> > > news:E5A31118-15F8-4916-891D-E39EC15F3D3F@microsoft.com...
> > > > When I refer to "volume shadowing" is mean what is called "Volume
> Shadow
> > > > Copy" in the Windows 2003 documentation.
> > > > RAID shadowing is customary called mirroring and I use the same
> > > denomination.
> > > >
> > > > "John Toner [MVP]" wrote:
> > > >
> > > > > Tudor,
> > > > >
> > > > > What do you mean by "shadowing"? Do you mean RAID1 mirroring?
> > > > >
> > > > > Regards,
> > > > > John
> > > > >
> > > > >
> > > > >
> > > > > "Tudor Cristea" <Tudor Cristea@discussions.microsoft.com> wrote in
> > > message
> > > > > news:0D1B7A94-76C6-44C8-9618-90989466F9D5@microsoft.com...
> > > > > > I have three questions about Windows clustering.
> > > > > > First question I have is a rather philosophical one:
> > > > > > Having some attached storage device, why would one even bother to
> use
> > > > > volume
> > > > > > shadowing at the operating system level? Most of us, when talking
> > > about
> > > > > > attached storage, think of SAN. There are far better possibilities
> to
> > > > > mirror
> > > > > > disks, both within and across controllers, while the operation
> would
> > > be
> > > > > more
> > > > > > efficient than shadowing at OS level. Shadowing at the operating
> > > system
> > > > > level
> > > > > > would make sense for internal disks, e.g. OpenVMS. In Windows this
> > > option
> > > > > is
> > > > > > not, however, available, which leads to the second question:
> > > > > > Why? Would quite interesting to have shadowing of internal disks.
> > > > > > Third question: Is it there a list of attached storage devices
> that
> > > can be
> > > > > > used for volume shadowing for Windows 2003 Enterprise?
> > > > > >
> > > > > > Best regards,
> > > > > > Tudor Cristea
> > > > >
> > > > >
> > > > >
> > >
> > >
> > >
>
>
>

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