Migrating data from smaller to larger metas

I have also to add that since S.E. 6.4.2 it's possible to have source devices smaller then target devices. But you have a lot of restrictions ..

To use larger target with symclone you have to set the following environment variable (not in options file):

SYMCLI_CLONE_LARGER_TGT = ENABLED

You can have a look at the output of symcli -env to see a brief description.
Now that you enabled larger target, remember that

Restore is not allowed
Full Copy support only; cannot use -differential
Concatenated metadevices are not supported
Number of members must match for striped metadevices

And now have fun

check out this thread:

https://forums.emc.com/forums/thread.jspa?tstart=0&threadID=64573

Hi Stefano,
Thanks for your post. I am trying to use it for migration, so restore is not question for me. Neither the differential copy. I am pretty sure i could survive without concatenated metas too. But the last point is a bit not clear for me. So i have to have 10 members for target device as i had it in source? The member size has to be bigger then? Let's say I have 10 members 8GB each striped metas at source and if i'd like to go for a larger device i have to have e.g. 10 members 10GB each striped metadevices?
If it is so, then it does not help me. I need to copy data to metas that has more members, but created with same size hyperdevices as the source.

Regards
Tarmo

One single word. YES



Yes .. that's exactly how it works .. You need the same number of bigger meta members



Symclone won't work .. You need something else (an host that can copy data from a lun to another lun)

-s-

Message was edited by:
Stefano Del Corno

Tarmo are you still working on this issue ?? Did we solve your problems ?? Did you receive usefull answers and informtions from this thread ?? Can we help more ??

Tarmo can we assume your question have been answered ??

I have the same problem. We constantly move data from smaller to larger devices. Why don't EMC provide a tool to move data quickly? We have to resort to host based copies between the devices.

AFAIK you can always buy (and use) OpenMigrator...

Think about asking an RFE .. Maybe someone else needs what you are asking for

We have tried Open Migrator/LM but it has a limit of 10 drives at a time. We move up to 48 at a time. It also is not supported on IA64.

too bad you edited your post

Stefano ..i like your new nickname ..the Bergamo man ...has a good sound to it hahahha

Thanks. I think this might be the best route. I have found nothing that will move muti-terabytes of data quickly from smaller devices to larger.

Message was edited by:
cgunner

missed it

Why not just use a symconfigure convert command?

add dev 1553:1554 to meta 0f76 protect_data=true bcv_meta_head=092f; (This can be used to expand the volume)

convert meta 186c, config=concatenated, protect_data=false;(This could be used to convert from striped to concat, you can also use the protected mode.)