Legacy HDS Forums

How to calculate number of LDEVs for Configuration

Discussion created by Legacy HDS Forums on Mar 13, 2007
Latest reply on Mar 14, 2007 by Legacy HDS Forums

Originally posted by: pjay

Hi All,

Does anyone know of any formulae for calculating in advance the number of 3390 LDEVs of various sizes that can be defined on a parity group.

For example: I will have 2 x 146GB 7+1 Parity groups concatenated. From this I want to create around 58 x 3390-L, 14 x 3390-9 and around 50 x 3390-3 volumes.

How can I determine in advance of the actual definition being tried by HDS whether this will fit? I am trying to map out a migration from 9980V to USP and would really like to be able to lock down reasonably accurately what definition I will be able to support.