Understanding New Features of Enginuity 5874 for Symmetrix V-Max

Base/Infrastructure Enhancements

  • RAID Virtual Architecture (RVA)
    • New RAID architecture internal to the Symmetrix
    • No longer requires multiple mirror positions for RAID protection
    • Unchanged supported types (R1, R5 3+1 and 7+1, R6 6+2 and 14+2)
    • All features use a common RAID engine
    • Enabling feature for Virtual LUN migration
    • Only requires 1 mirror position on device and opens up the remaining 3 mirror positions for other needs
  • Large volume support
    • Can support volume sizes up to 240GB (60GB on DMX4)
    • May eliminate the need for meta devices or reduce the number of members
    • Supports Mainframe EAV (extended address volumes)
    • Reduces the likelihood of encountering system addressing limits
  • 512 hypers per physical drive
    • Previously 255 max
    • Allows customers to better utilize large drives like 1TB SATA

Management and Provisioning Features

  • Auto-provisioning Groups
    • Creates storage groups which contains Symmetrix devices
    • Port groups which contains FA ports
    • Initiator groups which contains host HBAs
    • Create a view which associates these
    • Mapping and masking happens through the views now
    • Host will still need to rescan to see the storage
  • Dynamic Provisioning Enhancements
    • Introduced in 5773
    • Ability to make configuration changes like mapping without requiring a configuration file update (bin file)
    • In 5874, extended to include other device attributes like BCV, Dynamic SRDF, etc.
  • Concurrent Provisioning
    • Concurrent configuration changes (mapping and unmapping in parallel)
  • Management can be done over IP network
  • SMC can run on the Service Processor, which is on the customer’s internal network, out-of-band (FC)
  • No longer needs to be connected to the DMX via FC. Can still do it that way but not necessary

SRDF Enhancements

  • 2-Mirror SRDF consistency support
    • Previously SRDF/S/S with both legs in the same consistency group
    • Now you can put each leg in a separate consistency group so they can be changed separately
  • 250 SRDF groups
    • Previously 128 groups
    • Up to 64 SRDF groups are now allowed per FC or GigE SRDF port (previously 32)
  • SRDF/Extended Distance Protection (SRDF/EDP)
    • New long distance replication solutions
      • SRDF/S (from primary to secondary) to SRDF/A (from secondary to tertiary)
    • Diskless R21 pass-through device. No back-end physical disk requirement
    • Diskless R21 device is not host-accessible
    • Ability to achieve zero RPO at tertiary site
    • Only the secondary needs to be V-Max on 5874
    • Will need to add cache to support the diskless R21 devices
  • R22 dual secondary device
    • New device that can act as the target device for two distinct R1 devices.
    • Accepts R/W from only one of the source devices
    • This is used for SRDF/STAR situations
    • Improves the RTO if the primary site is lost
  • Add/remove devices to/from an active SRDF session
    • Prior to this release, adding/removing a device would mark the whole group invalid.
    • Once it becomes fully synchronized, then it will be added to the group consistency
  • SRDF Invalid Track Handling
    • Previous method of searching for invalid tracks (tracks owed) has been redesigned
    • Increases speed of SRDF control operations, like createpair (10x faster, measured)
    • Increases speed of establish
    • Improves the search for the last few tracks, known as the “long tail”
  • Concurrent TimeFinder/Clone and SRDF restore
    • Previously needed to do clone restore to R2, then restore R2 to R1
    • Can now happen at the same time, for both native clone and clone emulation

TimeFinder Enhancements

  • Target device of a clone session can be used as the source for another clone session without terminating the initial clone session
    • Source A > Clone B > Clone C
    • Supported in native clone and clone emulation
  • Performance improvements
    • Up to 250-300% increase in copy rates for R5/R6
    • Reduction of cache consumption during clone copy

Open Replicator Enhancements

  • Support for TimeFinder/Snap virtual devices (VDEVs)
    • Open Replicator push sessions can be created using VDEVs as the control devices
    • No longer requires full-copy clones or BCVs
  • Open Replicator support for IBM System I (iSeries) devices

Virtualization Enhancements

  • Enhanced Virtual LUN technology
    • Enables transparent, non-disruptive data mobility between storage tiers for standard Symmetrix volumes
    • Built on new RVA
    • Move between different drive spindles or change RAID protection type
    • Supports migration of meta devices
    • Works with all replication technologies
      • SRDF, TimeFinder/Snap, TimeFinder/Clone, Open Replicator
      • Active replication being migrated stays intact
      • Incremental relationships maintained
      • Allows customers to meet federal DR requirements
    • Migration can utilize configured or unconfigured disk space as target
  • Virtual Provisioning
    • Thin provisioning (available in previous releases)
    • Support to drain physical devices to shrink storage pools
    • Create 4x larger volumes
    • Virtually provision all tiers and RAID levels

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