[Bug 212179] qlogic 24xx series read speed limit

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Fri Aug 26 12:59:24 UTC 2016


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212179

            Bug ID: 212179
           Summary: qlogic 24xx series read speed limit
           Product: Base System
           Version: 10.3-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: mangelot at hotmail.com

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...


https://bugs.freenas.org/attachments/6577/screenshot2.png
https://bugs.freenas.org/attachments/6576/screenshot.png

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