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Status Delivered
Workspace IBM i
Categories Storage
Created by Guest
Created on Nov 27, 2018

NWSSTG space allocated on Spinning drives only

Currently you can allocate NWSSTG spaces on SSDs, but in many situations we have spinning and SSDs on the same partition. If we wish to create a Develop partition, we would prefer to use the spinning disks in the hosting partition over the SSDs. This way, we can host partitions more economically.

Use Case:

If we wish to create a Develop partition, we would prefer to use the spinning disks (Least expensive disks) in the hosting partition over the (more expensive) SSDs.

Idea priority Medium
  • Guest
    Jun 21, 2021

    Currently there is a method to keep objects off SSDs that specify the media preference as *ANY. See for more information on how to turn this setting on. At this time we are not enhancing this feature to be specific to NWSSTG objects.

  • Guest
    Apr 17, 2020

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Power Systems
    Product - IBM i
    Component - Storage
    Operating system - IBM i
    Source - None

    For recording keeping, the previous attributes were:
    Brand - Servers and Systems Software
    Product family - Power Systems
    Product - IBM i
    Component - System Management
    Operating system - IBM i
    Source - None

  • Guest
    May 14, 2019

    The CAAC has reviewed this requirement and recommends that IBM view this as a medium priority requirement that should be addressed. It allows the customer to select the storage most appropriate for the use of the partition.

    Background: The COMMON Americas Advisory Council (CAAC) members have a broad range of experience in working with small and medium-sized IBM i customers. CAAC has a key role in working with IBM i development to help assess the value and impact of individual RFEs on the broader IBM i community, and has therefore reviewed your RFE.

    For more information about CAAC, see

    For more details about CAAC's role with RFEs, see

    Nancy Uthke-Schmucki - CAAC Program Manager

  • Guest
    Dec 1, 2018

    I think that IBM i should take this RFE idea and move it one stage further, to allow the selection of any object to have it's preferred location specified as being SSD using the same method as we do with Tables / Files and Index / Logical. I.e. using the UNIT(*SSD) parameter on appropriate creation or change commands.

    If possible, I would suggest distinguishing between SSD and Flash as well so as to get the most appropriate placement of objects.

    I suppose asking for Easytier functionality in the storage engine would be too much for this RFE, maybe I'll write another one for that ;-)