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SAN Copy Questions
Quick question.
I have SAN Copy licenses on both a CX4-480 and CX4-240 and I have zoned the arrays together based on EMC's documentation. Essentially:
SP A0 - SP A0
SP A0 - SP B0
SP A1 - SP A1
SP B1 - SP B1
Both arrays are checked in to each other. I created a 500GB test lun and I want to migrate the data from the CX4-240 to the CX4-480. When I try to initiate the copy it says that it can't communicate. I'm wondering if there needs to be a storage group created on both arrays. If so, how would this help a lun migration if the luns are already in a storage group?!
There has to be a quick and easy Unisphere way of doing this without having to do CLI (which I hate). Anyone have any idea what's the best way to get it to work and to migrate luns from one array to the other? I know we're supposed to stop I/O as that makes sense. Do I have to remove the luns from the host to stop I/O? Do the luns needs to be removed from the hosts on both sides for this to work?!
Let me know!
dynamox
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May 9th, 2012 08:00
on the target , you have have to have a storage group that contains your target LUN and the source clariion is added as a host ..so that i can write to the target LUN. You treat source clariion as a host (as far as target array is concerned)
dynamox
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May 9th, 2012 08:00
take a look at this document, this is Clarion to VNX but the same concepts apply here
http://www.emc.com/collateral/hardware/white-papers/h8173-migrating-clariion-vnx-san-copy-wp.pdf
jarbarian
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May 9th, 2012 09:00
Ok never mind I got that done now I cannot find a lun for the reserve pool. I created a 500GB lun so I am not sure why it's not showing up as available.
Sheron1
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May 9th, 2012 10:00
Go to the RLP option under "Replica"
Tap "configure"
It will list the free LUNs on the left hand window.
Check if your LUN is reflected there and add it if it is.
Check the page 11 of the doc that Dynamox have given.
jarbarian
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May 9th, 2012 10:00
I did, no luns appear. Yes, I have been following the document. The question I have is "Do I need to add a new lun to the storage group that has had the ports configured for SAN COPY or can I use newly created luns to add to the RLP?"
jarbarian
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May 9th, 2012 11:00
Respectfully,
Brian Coulombe, Sr. Storage Area Network (SAN) Engineer
Entwined Technologies, Inc.
Drug Enforcement Administration (SPTC)
Brian.T.Coulombe@usdoj.gov
Desk: 703-285-7134
Cell: 619-616-9410
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jarbarian
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May 9th, 2012 11:00
Ok so I just need to create a bunch of small luns for RLP and then I can go forward with the other luns I created for SAN COPY? Why would RLP be able to see a bunch of small 10GB luns and not the 500GB luns I already created?
dynamox
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May 9th, 2012 11:00
RLP is used by SanCopy/SnapView, you need to have one RLP LUN for each SanCopy LUN you are going to migrate. They don't have to be very big, create a dozen of 10G LUNs and assign them to RLP.
Next on the target you create a new LUN that will be your target for SanCopy operations, this LUN needs to be equal or larger capacity as your source LUN. This LUN needs to be added to the storage group where you had configured the ports for SanCopy.
jarbarian
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May 9th, 2012 12:00
Ok I created 12-10GB luns for the RLP and they still don’t show up when I try to configure the RLP. What am I missing here?!
etaljic81
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May 9th, 2012 12:00
They are not thin LUNs, correct?
jarbarian
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May 10th, 2012 04:00
Ok well I have the RLPs created on both sides but just testing SAN Copy shows me that whenever I try to do a full copy of a lun it never shows the destination array, even though they both have been zoned together correctly. I’ll look at the docs but looking for any insight! Thanks!
jarbarian
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May 10th, 2012 05:00
Agreed. But what I’ve found, aside from the fact they are both in the san Domain, is that I have to PULL from the destination array as pushing from the source array doesn’t seem to work. I have a transfer in progress now and am testing.
etaljic81
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May 10th, 2012 05:00
That's a known issue. That is addressed in one of the latest Flare releases. I cannot recall which Flare version EMC fixed it in but it is fixed in the latest one for sure. For now you have to enter the id of the lun or you can upgrade the Flare version on the arrays.
etaljic81
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May 10th, 2012 05:00
If you have SANCopy enabled on both arrays then you should be able to do both, push or pull.
dynamox
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May 10th, 2012 09:00
don't trust the GUI, real SAN Admin use the CLI![]()
Setup SanCopy sessions
NaviSeccli.exe -user Admin -password password -scope 0 -address 10.1.8.30 sancopy -create -incremental -name Lun546to19C8Mig -srcwwn 60:06:01:60:99:51:0D:00:DE:6A:04:C6:09:49:DA:11 -destwwn 60:06:04:80:00:01:90:10:45:18:53:30:31:39:43:38 -throttle 10 -verify
Next step is to initiate SanCopy process (server is up and running)
the reason we are using copywholelun and nomark options is because we want to perform a full copy (even though the session was created as incremental in the previous step, we also do not want SanCopy to utilize COFW since we will be performing SanCopy again once the server is shutdown. Make sure to issue the command to the SP that owns the source LUN.
NaviSeccli.exe -user Admin -password password -scope 0 -address 10.1.8.30 sancopy -start -name Lun546to19C8Mig -copywholelun -nomark all
To view progress of SanCopy session you can use these two commands:
NaviSeccli.exe -user Admin -password password -scope 0 -address 10.1.8.30 sancopy -info -all
or
NaviSeccli.exe -user Admin -password password -scope 0 -address 10.1.8.30 sancopy -info -complete
Next step is to initiate final SanCopy process (server has been shutdown)
now that the server/application is shutdown we are going to perform final SanCopy process that will copy new and changed blocks since our last SanCopy.
NaviSeccli.exe -user Admin -password password -scope 0 -address 10.1.8.30 sancopy -start -name Lun546to19C8Mig
Last step is to remove SanCopy session
This step removes SanCopy relationship between the source and destination LUNs.
NaviSeccli.exe -user Admin -password password -scope 0 -address 10.1.8.30 sancopy -remove -name Lun546to19C8Mig