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: b...@freebsd.org
Reporter: p...@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)
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