170 IBM System Storage N series Hardware Guide14.1 Primary issues that affect planningYou need to determine the following questions during the planning process: Which model IBM System Storage N series to use What amount of storage would be required on the IBM System Storage N series Which optional features are wanted What your future expansion requirements areTo begin the planning process, use the following IBM solution planning tools: IBM Capacity Magic IBM Disk Magic14.1.1 IBM Capacity MagicThis tool is used to calculate physical and effective storage capacity. It supports the IBMDS6000™, DS8000, IBM V7000, and N series models. IBM staffhttps://w3-03.sso.ibm.com/sales/support/ShowDoc.wss?docid=E272838K75735I92 IBM Business PartnersTBA14.1.2 IBM Disk MagicThis tool is used to estimate disk subsystem performance. It supports the IBM XIV, DS8000,DS6000, DS5000, DS4000®, SAN Volume Controller, V7000, V7000U, and SAN-attached NSeries. IBM staffhttps://w3-03.sso.ibm.com/sales/support/ShowDoc.wss?docid=Q947558L63209Z65 IBM Business PartnersTBA14.2 Performance and throughputThe performance required from the storage subsystem is driven by the number of clientsystems that rely on the IBM System Storage N series, and the applications running on thosesystems. Keep in mind that performance involves a balance of all of the following factors: Performance of a particular IBM System Storage N series model Number of disks used for a particular workload Type of disks used How close to capacity the disks being run are Number of network interfaces in use Protocols used for storage access Workload mix (reads versus writes versus lookups)– Protocol choiceRestriction: The Disk Magic and Capacity Magic tools are licensed for use by IBM staffand IBM Business Partners only.
