[Bug 246279] ciss driver unable to see more than 48(?) physical drives per controller

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=246279

            Bug ID: 246279
           Summary: ciss driver unable to see more than 48(?) physical
                    drives per controller
           Product: Base System
           Version: 12.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: pen at lysator.liu.se

If I connect an HP D6020 external SAS disk enclosure to an HP H241 (HBA mode)
and then connect each drawer to each port of the H241 then the system just sees
the first 48 drives (and not all 70). Looking at the output from 'camcontrol
devlist' the last drive seen have "at scbus4 target 63 lun 0" and the first "at
scbus4 target 16 lun 0".

If I connect each drawer into separate H241 controllers then all 70 drives are
visible.

According to HP documentation the H241 should handle up to 200 physical drives.

I've tried reading the ciss driver source code and I can't see any "obvious"
limits/adjustable knobs but I might be missing something....

The "target 63" number feels lika a 64-target-limit somewhere.
(The first 16 I'm guessing is reserved for logical drives (which we don't use)
so I'm guessing that's why it starts numbering at 16).

(Now I want to connect a second D6020 to the server(s) in question so I can use
the "use two controller cards" solution anymore)

-- 
You are receiving this mail because:
You are the assignee for the bug.