probing LUN's

[Nate Lawson]

On Wed, 23 Jul 2003, Andrew Heybey wrote:
> >>On Wed, 23 Jul 2003 21:25:44 +1000 (EST), Tony Maher <tonymaher at optushome.com.au> said:
>   tonymaher> Hello, I have been attempting to get a Hitachi SAN
>   tonymaher> attached to a FreeBSD box via a Qlogic 2300 card.  The
>   tonymaher> card appeared to work ok (as evidenced by verbose boot
>   tonymaher> messages but no disk(s) was seen.  Finally was able to
>   tonymaher> see disk with a 'camcontrol rescan 1:0:4'
>   tonymaher> command. Previous 'camcontrol rescan all' and 'camcontrol
>   tonymaher> rescan 1' failed to see disk.  (and obviously not seen at
>   tonymaher> boot time).
>
>   tonymaher> I did not set the SAN up but from a cursory examination:
>   tonymaher> The SAN has two controllers and two 'logical' raid 5
>   tonymaher> devices.  One controller is connected to a Sun box which
>   tonymaher> sees c1t0d[0-3] and the 4th lun appears to be given over
>   tonymaher> to the second controller for the FreeBSD box.
>
>   tonymaher> I assume this means that CAM does not probe all LUN's if
>   tonymaher> no device at LUN 0 or sys/cam/cam_xpt.c has quirk entry
>   tonymaher> for device that disables LUN probing.  There is quirk for
>   tonymaher> {"HITACHI", "DK31*"} but the SAN reports as Hitachi
>   tonymaher> DF600F (I think, sorry its at work and I cannot access it
>   tonymaher> currently) so the second case shouldn't be a problem.
>
> You need the ispfw driver (either compiled-in or modloaded) to probe
> luns beyond LUN 0 for the QLogic FC card.  If that is not your
> problem, then I do not know...

That's true.  However, if camcontrol rescan 1:0:4 works for him, then he
can try setting CAM_QUIRK_HILUNS for his device to get other luns probed
when 0 doesn't respond.

-Nate