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Dell PowerStore Importing External Storage to PowerStore Guide

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CHAP restrictions

The following describes the CHAP support for importing external storage to a PowerStore cluster:

  • For Dell Unity and VNX2 systems, source volumes with single CHAP can be imported, but source volumes with mutual CHAP cannot be imported.
  • For Dell EqualLogic Peer Storage (PS) series, there are three cases:
    • When Discovery CHAP is disabled, source volumes with both single and mutual CHAP can be imported.
    • If Discovery CHAP is enabled, source volumes with single CHAP can be imported.
    • If Discovery CHAP is enabled, source volumes with mutual CHAP cannot be imported.
    NOTE:If Dell Unity or VNX2 systems are added in CHAP enabled mode and if a Dell EqualLogic PS system is added, ensure that Discovery CHAP is enabled for the Dell EqualLogic PS system.
  • For Dell Compellent Storage Center (SC) series, source volumes with both single and mutual CHAP can be imported.
  • Each host must be added with unique CHAP credentials.

XtremIO XI and X2 support the iSCSI CHAP settings that are listed in Table 1.

Table 1. XtremIO XI and X2 supported iSCSI CHAP settingsThis table lists the supported CHAP Discovery Mode and CHAP Authentication Mode combinations for XtremIO XI and X2 systems.
CHAP Discovery Mode CHAP Authentication Mode
Disabled Disabled
Disabled Either Initiator or Initiator and Target
Initiator Either Initiator or Initiator and Target
NOTE:The CHAP Discovery Mode Initiator and Target setting with either a CHAP Authentication Mode setting of Initiator or Initiator and Target is not supported.

The PowerStore iSCSI CHAP settings may differ from the XtremIO cluster. Configure the PowerStore iSCSI CHAP settings appropriately before setting up the import session. The supported iSCSI CHAP settings of XtremIO XI and X2 systems and the corresponding settings that should be selected in the Add Remote System slide-out panel from Migration > Importing External Storage > Remote Systems > + Add Remote System in PowerStore Manager are listed in Table 2.

Table 2. PowerStore Manager Add Remote System slide-out panel iSCSI CHAP settings for XtremIOThis table lists the supported iSCSI CHAP settings of XtremIO XI and X2 systems and the corresponding settings that should be selected in the PowerStore Manager Add Remote System slide-out panel.
Configured XtremIO iSCSI CHAP setting PowerStore Manager Add Remote System slide-out panel iSCSI CHAP setting
Disabled for CHAP Discovery Mode Select Disabled for Discovery CHAP Mode.
Initiator for CHAP Discovery Mode Select Enabled for Discovery CHAP Mode.
Disabled for CHAP Authentication Mode Select Disabled for Session CHAP Mode.
Initiator for CHAP Authentication Mode Select Single for Session CHAP Mode.
Initiator and Target for CHAP Authentication Mode Select Mutual for Session CHAP Mode.

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