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ONTAP SAN Solaris Kernel Zones is using wrong 512b Blocksize

Applies to

  • ONTAP 9.7
  • Solaris 11.4 64-bit

Answer

  • LUN's have 4KB Sectors in the global Zone ashift default value is 9 ( 512 bytes )
  • Host or SAN not optimal during creation of zpools to detect correct parameters with ashift
    • Viewed by running the command zdb -C 
    • For optimum performance, the ashiftvalue must be 12 (2^12=4K)
once resolved the only way to correct existing zpool is to re-create it and migrate data

 

Additional Information

For further assistance, contact NetApp Technical Support and reference this article.