Richard Siemers wrote:
Each host can have one LUN 0 assigned to it per storage controller. If you had two 3PAR systems attached to 1 host, he could have two LUN 0, but as you can imagine that could cause some identification complexity with some hosts/OSes.
I leave auto on when:
Assigning a lun to a single stand alone host, connected to only 1 storage system.
I turn auto off when:
When complexity requires advanced labeling,
On hosts attached to multiple 3PARs, we use LUN 0-99 for one and 100+ for the other.
On ESX clusters (one 3par dedicated to ESX) we use LUNs 0-99 for Prod, and LUNs 100+ for Dev.
On MS-SQL where we have a special request for 1 node only to get a LUN, we will assign this one off starting at 100, so that the auto will continue to work correctly when assigning to the host set.
Thanks you Richard