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тАО12-22-2004 02:41 AM
тАО12-22-2004 02:41 AM
( Not snapclone) to a windows host where the parent vdisk is currently presented/mounted.
I know this is possible in HP-UX because I do it all the time. I seem to remember that Windows 2003, does not support mounting the Snapshot on the same host while the parent vdisk is mounted. In other words, the snapshot can only be mounted on a different host.
If it is possible to mount the snapshot on the same host as the parent, what is the proper way to do so? I have tried several ways, but windows always detects the snap as a "foreign disk" evan after importing it.
Thanks,
Joseph
Solved! Go to Solution.
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тАО12-22-2004 03:43 AM
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тАО12-22-2004 04:05 AM
тАО12-22-2004 04:05 AM
Re: Business Copy EVA and Windows 2003
The only reason I specifed Snapshot and not Snapclone is because once the SnapClone process is complete it becomes its own entity indenpendent of the parent copy. This would allow you to mount/present the snapclone on the same host as the parent. Or am I wrong and Windows won't even allow you do this?
Thanks again for your input.
Joseph
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тАО12-22-2004 04:58 PM
тАО12-22-2004 04:58 PM
Re: Business Copy EVA and Windows 2003
I have just checked and at least in CV-EVA (don't have a BC-EVA setup in the lab right now) I can present a snapshot to the same host as the parent disk. Not surprising as you already wrote that one can do that with HP-UX, although one must be careful, because you have to deal with duplicate identifiers of PVs and VGs as well.
From a logical view, the host does not see a difference between a snapshot and a snapclone - both are 'point of time copies'.
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тАО12-23-2004 06:13 AM
тАО12-23-2004 06:13 AM
Re: Business Copy EVA and Windows 2003
This should enable the requested functionality, as long as it is W2K3.
rgds
lars
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тАО12-27-2004 07:49 AM
тАО12-27-2004 07:49 AM
Re: Business Copy EVA and Windows 2003
Yes, under HP-UX I do it all the time and it works great, assuming you do it properly (vgchgid, vgimport, etc. etc.)
L.B. If I am not mistaken, the installation of the BC Host Agent on a system where Volume Shadow Copy Services are used is not supported. I've checked the BC 2.3 Admin guide and it says the following: "BC does not support installing BC host agent software on Windows Server 2003 hosts using Volume Shadow Copy Services, because of interoperability issues"
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тАО12-27-2004 08:53 PM
тАО12-27-2004 08:53 PM
Re: Business Copy EVA and Windows 2003
I am not running BC in a production environment, but I just did a short test:
- two servers running Windows 2000
- both have a single virtual disk mapped
- create a snapshot from one VD and present it to the other server using CV-EVA
- on the other server, just do a 'rescan disks' and the snapshot pops up like a normal disk
- of course, I can put new data on the snapshot because it is writeable by default (else, the NTFS cannot be mounted -- tried it and the system 'acts strange')
- yes, I know that the data is gone once I delete the snapshot ;-)
I haven't tried presenting the snapshot to the same server - I did this some years ago and it completely screwed up the system (it was the last action during a storage training and I wanted to see what it looks like).
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тАО12-29-2004 03:32 AM
тАО12-29-2004 03:32 AM
Re: Business Copy EVA and Windows 2003
I think that same disk signatures on parent and coppied disk avoids correct utilization of such configuration. Even if you successfully connect copied disk problems may start a little bit later when you try to work with it. If it is possible connect cloned disk to different system first and change signature for example with dumpcfg utility from resource kit (dumpcfg
Vladimir