tech511
2 Bronze

Creating DRV(Dynamic Relocation Volumes)

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Hi,

We are about to set up optimizer and I was just wondering on how to create DRV's that are required to perform swaps.

Any information on how to create (symcli command) would be useful. What are the best practices for creating DRVs.

Thanks in Advance

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Amita2
2 Iron

Re: Creating DRV(Dynamic Relocation Volumes)

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Hi,

With Enginuity 5874, only mirrored DRV devices can be created.So, you would need to use the syntax:

create dev count=X, size=XXXXXX cyl, emulation=XXX, config=2-Way-DRV-Mir



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butters1
1 Copper

Re: Creating DRV(Dynamic Relocation Volumes)

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Any help!

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Quincy561
4 Tellurium

Re: Creating DRV(Dynamic Relocation Volumes)

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Optimizer works best when all your devices are the same size.

The DRVs should be as large as your largest device that will be optimized.

You need 2 DRVs for each swap that you want to be executed concurrently.  I think there is a difference in protection on VMAX vs. DMX.  Is your case a DMX or a VMAX?

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RobertDudley
3 Argentium

Re: Creating DRV(Dynamic Relocation Volumes)

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DRV's are unprotected devices what array model are you trying to do this on and what code is it running (enginuity)?

You would have to create an unprotected device and then set the DRV flag on it.

And you may want to check this thread or I could just poach all of Stefano's data that he posted here.

https://community.emc.com/message/400056

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tech511
2 Bronze

Re: Creating DRV(Dynamic Relocation Volumes)

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Thanks Quincy!...at this time we are trying to set optmz on VMAX running 5875, the SE is 7.2.1.

I still wanted to know how to create a DRV. is there a command. symconfigure does not have one with the DRV attribute.

Also should the DRVs be created on a per diskgroup basis?Since you said 2 or more, where should these be created.

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tech511
2 Bronze

Re: Creating DRV(Dynamic Relocation Volumes)

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Robert,

We are doing this on a VMAX with 5875 enginurty.

how do i create an unprotected device and set the DRV flag?? -Thanks

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Quincy561
4 Tellurium

Re: Creating DRV(Dynamic Relocation Volumes)

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I'm trying to find some documentation on Optimizer on VMAX.  As I recall the DRVs are mirrored in VMAX.  The swap process is quite different than DMX because we can mirror a whole volume to another using the virtual RAID that was introduced in VMAX. 

Quincy561
4 Tellurium

Re: Creating DRV(Dynamic Relocation Volumes)

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Also, just to be clear, Optimizer only works for thick devices, not VP devices.

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RobertDudley
3 Argentium

Re: Creating DRV(Dynamic Relocation Volumes)

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Stefano Del Corno did all sorts of work with this in the thread I posted a link to.

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