Bug 212179

Summary: qlogic 24xx series read speed limit
Product: Base System Reporter: Mangelot <mangelot>
Component: kernAssignee: freebsd-bugs (Nobody) <bugs>
Status: New ---    
Severity: Affects Some People    
Priority: ---    
Version: 10.3-STABLE   
Hardware: Any   
OS: Any   

Description Mangelot 2016-08-26 12:59:24 UTC
Qlogic 2464 (my own quad port HBA) target read speed limited with kernel driver isp(4)

Multiple people are complaining of a issue with qlogic 24xx series cards
that the read speed in target mode is limited (+/-200MB/s) 
and write speed +/-390MB/s (which is okay). 

Its reported in freenas versions (based on freebsd) but freenas isn't supporting target mode officially.they tested it and confirmed the issue an they told me it solved by setting link to point-to-point (which didn't help).
they also confirmed that te issue isn't with 25xx cards...