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February 22nd, 2008 03:00
Relationship "No Host" - SDR Device Mapping back to unmapped
Hi
I am just doing a clean up of our DMX and want to put all Disks in their correct place.
I am making one presumption on this and want it checked before I change the SDF Device Mapping.
I am checking each Device by looking at its relationship with a host. If no relationship is found, my presumption is that it is not Masked to any host and therefore can be moved back into the UnMapped Device Pool.
These are straight devices we are talking about, nothing special etc.
Best regards
I am just doing a clean up of our DMX and want to put all Disks in their correct place.
I am making one presumption on this and want it checked before I change the SDF Device Mapping.
I am checking each Device by looking at its relationship with a host. If no relationship is found, my presumption is that it is not Masked to any host and therefore can be moved back into the UnMapped Device Pool.
These are straight devices we are talking about, nothing special etc.
Best regards
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RRR
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February 22nd, 2008 06:00
If you have BCVs mapped to an FA for backup purposes, I can imagine that sometimes that BCV is not masked to a host and sometimes it is masked. I would check if those "orphaned" symdevs perhaps are BCVs or clones or snaps or something.
Allen Ward
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February 25th, 2008 08:00
This is why we keep maps of all our systems that include the associated R1s, R2, BCVs, CLONEs, VDEVs, etc. Since they are not all masked at the same time (especially in our DR site) we refer to this to verify if mapped but unmasked devices have become "orphaned".
RRR
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February 25th, 2008 12:00
WingCommander1
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February 26th, 2008 13:00
Thanks for your answers however I don't see how "symdev show " helps me.
I understand in relation to maps of all the hosts <-> devices, and this is something we will look to do in the very near future especially as we are about to start DR in our environment.
However I think this two are orphaned devices, I just wanted to make sure....
Thanks for your help
Any other information would be helpful
Best regards
david4blue
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February 27th, 2008 08:00
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Thanks,
David D. Ward
EMC Resource Management Software Group
Forums Moderator/Host
RRR
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February 27th, 2008 12:00
bodnarg
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February 28th, 2008 05:00
If all of your ports are VCM enabled then you can disregard this
To check Clone/BCV/Snap relationships you could run the following short listing commands just to verify if the device in question has a defined relationship you need to cancel or research:
symbcv list
symclone list
symsnap list
If you find the device in question in this output then you need to research that relationship before reclaiming the device.