Fast Fail and Dynamic Tracking

Fast Fail and Dynamic Tracking should be enabled for any HBA port zoned to a Pure FlashArray port.

# chdev -l fscsi0 -a fc_err_recov=fast_fail -P 
fscsi0 changed 

# chdev -l fscsi0 -a dyntrk=yes -P 
fscsi0 changed 

You can confirm these settings with lsattr:

# lsattr -l fscsi0 -E
attach switch How this adapter is CONNECTED False
dyntrk yes Dynamic Tracking of FC Devices True
fc_err_recov fast_fail FC Fabric Event Error RECOVERY Policy True
scsi_id 0x420d00 Adapter SCSI ID False
sw_fc_class 3 FC Class for Fabric True