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chjatwork
3 Argentium

Easy way to identify what storage group a datastore is linked to

Community,

Is there an easy way to identify which storage group (on VMAX) any given datastore (within VMware) is associated with?  I need to generate a report that will identify what systems will be moved when we migrate certain storage groups to a new frame.

Thank you,

12 Replies
umichklewis
4 Beryllium

Re: Easy way to identify what storage group a datastore is saved on

If you have installed Solutions Enabler on a host server connected to your VMAX, you can use the symvm command to list servers and datastores.

If not, you can install the Solutions Enabler Virtual Appliance in your VMware environment, supplied as a downloadable OVA.  Once you install and configure the appliance, you can enable the VASA provider and get VMAX information displayed directly in vSphere.  This is the fastest route, because you'll be able to see the SymDev number of each LUN for your mapping purposes.

You can get more detail about the VASA provider and how it's used in this old whitepaper.  It gives you a pretty clear overview of how this integration pulls all the data you need into vSphere.

Let us know if that helps!

Karl

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WorldPolice
2 Iron

Re: Easy way to identify what storage group a datastore is saved on

Unfortunately symvm is no longer supported and the VASA 1 integration isn't going to help as it does not do in-context storage translation. Best bet is to use Virtual Storage Integrator. We have a VMAX LUN Viewer which will show you the device ID, storage group, and datastore. I have a video here you can see how it works:  VSI 7.0 – the VMAX release – DELL EMC VMAX and PowerMax with VMware

You can copy and paste from the screen and that would give you want you want I think.

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chjatwork
3 Argentium

Re: Easy way to identify what storage group a datastore is linked to

Ahhh... such a bummer!  The vmware team evaluated this tool and found it NOT approved as per policies and processes.  Is there a way I can gleam a report on unisphere for VMAX that will let me see both the storage group and WWN(s) that is linked to? 

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WorldPolice
2 Iron

Re: Easy way to identify what storage group a datastore is linked to

There is some ability in the Unisphere REST API to do this, but the VMware integration for REST is still in development. You could pull storage groups, WWN, etc. but not the relationship with the datastores. Reports within Unisphere are limited to performance unfortunately.

chjatwork
3 Argentium

Re: Easy way to identify what storage group a datastore is linked to

Drew,

any way to get the WWN and the storage group on the same report?  Rather than having to deep dive 2 levels into the storage group?

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WorldPolice
2 Iron

Re: Easy way to identify what storage group a datastore is linked to

It could be scripted, this information is available in the REST API. You can get a list of all storage groups, then the devices in the storage group and the associated WWN. I've seen Python be used in conjunction with the REST API. Paul's blog is a good place to get information  Getting Started with VMAX REST API

As I noted VSI really is the easiest way to get the info but I understand your company won't allow it.

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Jasonc1
3 Argentium

Re: Easy way to identify what storage group a datastore is linked to

"easy" is a relative term :-)  Do you have any method to do this currently?

The thing that ties the Datastore and a Symmetrix device is the WWN. So it is a 'simple' case of matching the some output from ESX that lists Datastore name and UUID /  NAA value with some Array output that lists device WWN and SG name.

You can produce output with SG name and device WWN with symcli commands. You will need to run symsg and symdev commands together so we are talking a script. There is generic help to do this Here.

Specifically it would look something like this:

C:\for /f "tokens=1" %i in ('symsg -sid xxx list ^| findstr F.X') do echo SG %i & symdev -sg %i list -wwn | findstr Visible > symsg_devwwn.txt

Obtain your Datastore, NAA/UUID output from ESX and put both outputs into excel, using the WWN as a key to match the data.

Some might call this easy :-)

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chjatwork
3 Argentium

Re: Easy way to identify what storage group a datastore is linked to

Does anyone know the WWN breakdown?  Or where I can find how to read it, i.e. URL, book, etc...?  Its so long and I want to make sure I understand what I am looking at.   I know that the first 8 mean something the next set of 8 mean somthing...etc..  I just want to be able to figure out what that is.

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WorldPolice
2 Iron

Re: Easy way to identify what storage group a datastore is linked to

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