On 21 Mar, 22:21, Jim McCullars wrote:
> Greetings:
>
> We are running a HP EVA 3000 storage area network and in Command View EVA
> there is a user setting under Occupancy called Alarm Level. We have it set
> at 90%, but what is the purpose of this alarm? Is there a performance
> consideration when the occupancy level exceeds a certain threshold, or is
> this just a "its getting time to buy more disks" thing? Thanks...
>
> Jim McCullars
> University of Alabama in Huntsville

Both. For continued optimal performance, the EVA needs a bit of room
to be able to do reallocation and leveling as it redistributes blocks
around the spindles in a disk group.

Also, if you've grown above 90% occupancy, it would indeed be an
indication you're running out of space.