Dell PowerMax and VMAX All Flash: SRDF/Metro Overview and Best Practices

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  Overview
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  Audience
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  Revisions
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  We value your feedback

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  SRDF/Metro overview
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  Key differences between SRDF/Metro and standard SRDF modes

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  Configuration overview
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  Createpair operation
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  Device pair synchronization
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  Device pair operation
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  FAST integration

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  Resiliency features
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  Understanding bias
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  Understanding the array-based witness
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  Understanding the Virtual Witness (vWitness)
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  PowerMaxOS/Solutions Enabler 9.0 (and later) witness enhancements
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  Use bias resiliency option
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  Witness best practices for redundancy
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  Witness behavior during failures and recovery

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  Host support matrix example

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  Introduction
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  PowerMaxOS 10 July 2022 release
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  PowerMaxOS 5978 Q3 2020 service release
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  PowerMaxOS 5978 Q2 2019 service release
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  PowerMaxOS 5978 Q2 2018 service release
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  HYPERMAX OS Q3 2016 service release
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  HYPERMAX OS 5977.811.784 service release

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  Introduction
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  Adding New Devices to an SRDF Metro Session
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  Movepair –exempt
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  Understanding the consistency exempt status

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  SRDF/Metro online device expansion (ODE operations)

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  Introduction
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  Witness configuration
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  Environment definition
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  Smart DR setup
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  Converting SRDF/Metro with DR to Smart DR
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  Smart DR removal
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  Adding devices and Online Device Expansion (ODE)
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  Smart DR control operations
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  Monitoring Smart DR

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  Introduction
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  Boot from SAN support
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  Host multipathing software
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  AIX native multipathing software
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  AIX, GPFS, and PowerPath
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  Native Linux Multipathing Software (Linux Device Mapper)
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  Configuring Path Priority RHEL 8.0 and Higher
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  IBM I (AS/400) operating system
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  PowerPath (version 5.7 and above)
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  Windows 2012 with MPIO
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  Veritas dynamic multipathing
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  ESXi with native multipathing

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  Restrictions and dependencies

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  Conclusion

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  Appendix A: Unisphere setup walkthrough

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  Appendix B: Solutions Enabler SYMCLI walkthrough

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  Appendix C: Unisphere Movepair –Exempt specific steps

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  Appendix D: Unisphere Online Device Expansion (ODE) steps

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  Appendix E: Unisphere Smart DR walkthrough
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  Starting the Protection Wizard

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  Appendix F: Smart DR and status reference tables

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  Appendix G: Technical support and resources