Legacy HDS Forums

LDEV/LUN sizes in virtualized environemnt - best practise ?

Discussion created by Legacy HDS Forums on Oct 6, 2010
Latest reply on Oct 8, 2010 by Legacy HDS Forums

Originally posted by: przemolb

We have faced problems with different LDEV/LUN sizes while using Hitachi Tiered Storage Manager (HTSM).
We would like to save ability to online move LDEV/LUNs between USP VM and virtualized arrays in _both_ directions.
But it seems that when I try to create LUN on virtualized array (with the same size in blocks) it rounds it up and the size is different.
If the size is different the online data movement (from USP VM to external) requires re-sizing which takes time and doesn't allow us to de-virtualise the external array in the future.
How do you deal with such problems ? Can you share your experience ?