Ask the Expert: Meet the EMC Unity Family

soarem wrote: To expand on this question... The only time unity should use the battery is in the event of a power loss to both SP's to facilitate de-staging write cache to the non-volatile SSD on the SP and shutting the array down cleanly correct?

not sure to which of the 142 posts in this thread you are referring to

@Rainer_EMC

I edited the post with that information.

soarem wrote:

To expand on this question... The only time unity should use the battery is in the event of a power loss to both SP's to facilitate de-staging write cache to the non-volatile SSD on the SP and shutting the array down cleanly correct?

that is my understanding - I dont see where else we would use it

Hi,

I would like to know how the pool expansion works on Unity, are the LUNs re-balanced across the Raid Groups when we expand the pool?

Thanks

Hi,

I would like to know the HP 3PAR to Unity migration strategy using SAN copy Pull operation? Please share the document, if you have any.

Thanks!!

Hello,

Looking for some help on the Community Edition and trying to regenerate the VASA certificate. It seems that the certificate shows with the Issuer of my PSC FQDN for some reason when it should show as itself for the issuer. Is there a process to regenerate this certificate correctly for the vasa provide URL?? Without being able to do this, I can't register the storage provider or else I'll have to redeploy the VSA again......my guess is that if this can happen on the VSA it can happen on the physical UNITY as well (which isn't as easy to re-deploy )

Thanks!

-Keith

Can we not take snapshot of disk in Unity ?

Hi blaram ,

The question is a bit vague, but of course we can.

Have a look at this doc:

https://support.emc.com/docu69887_Dell_EMC_Unity:_Snapshots_and_Thin_Clones_-_A_Detailed_Review.pdf?language=en_US

Andre @ Dell EMC

Hi,

I am working on EMC Unity , Snapshot and want to know can we replicate snapshot taken in Unity to other storage devices, for example , If I have my application running on EMC unity and I have taken snapshots , now I want to move these snapshots to other storage say AWS cloud or other , then is there way to do this ??

Andre Da Costa Vaz  EMC Administrator 

Thanks & Regards

Blaram

there now is a capability to replicate block snapshots to the cloud via CTA

take a look at the available white paper for details - there also is a video available

P.S.: I would really suggest to open a new discussion rather than adding to this one year old and very lengthy thread

Hello,

What is the maximum concurrent SANCOPY session that can be run on UNITY systems at the same time?

Does it depend on the model or firmware?

can you share the document describing the limitation if there are any?

Regards

See the migration technologies white paper, page 13:

https://www.dellemc.com/resources/en-us/asset/white-papers/products/storage/h15163-dell_emc_unity-migration_technologies.pdf

Hi Team,

How we can verify when was the Block and file pool was expended. Can we get the information from CLI or Unisphere?

Thank you.

if you mean file system extension like in growing the file system both the jobs list and logs in the Unisphere Events section will show that the file system has been modified.

Of course the logs on the system have a limited size - so if you want to keep that info for longer you should configure remote logging to a syslog server