Re: Odd behavior of a "SAS-2" backplane with SGPIO commands

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


On Sun, Aug 19, 2012 at 09:47:17AM -0400, Rich wrote:
> I've got open discussions with both Supermicro and LSI at the moment,
> and have shipped one of them a backplane and HBA to demonstrate this
> since they couldn't replicate it easily in-house.
> 

Cool! Let's hope they'll be able to fix it..

> I also wouldn't claim SGPIO is "disabled" on any of these cards - any
> of the RAID cards don't expose the virtual SMP port, but said blinking
> works fine through LSI's magic binary blob MegaCLI. And with the
> 9211-8i and other SAS2008 HBAs (9201-16i being the one I have a lot
> of), it works great on any expander I've tried, but on the passive
> backplanes in these, the behavior is as I described - blinking one LED
> per SAS port plugged from a given HBA into the backplane. [...which is
> even more fascinating the more you think about it, since that means
> that the behavior easily straddles multiple passive management chips,
> which looks more like an HBA-end problem...]
> 

Yep.. 

btw do you have example commands/scripts/tools for SGPIO LED control? 
I should be able to try this stuff in a couple of days.. 

Otherwise I'll try reading the SFF-8485/SGPIO spec and play with smp_write_gpio/smp_read_gpio :)

Thanks,

-- Pasi


> - Rich
> 
> On Sun, Aug 19, 2012 at 9:13 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> > On Sun, Aug 19, 2012 at 03:50:00PM +0300, Harri Olin wrote:
> >> On 19.8.2012 13:25, Pasi Kärkkäinen wrote:
> >> >>To be brief, the sas2ircu toolset works perfectly fine with IT mode
> >> >>HBAs - just not with passive backplanes AFAICS [e.g. the 846A, versus
> >> >>the 846EL2].
> >> >Ok. So with an expander backplane (846EL*) with SES, sas2ircu is able to control leds?
> >> >"LOCATE" command works? I haven't been able to try those commands with SES backplanes
> >> >because in these systems I've been trying to avoid expanders :)
> >>
> >> I think SGPIO control is disabled intentionally on LSI 9211-8i
> >> firmware, maybe others. When using expander, the expander controls
> >> LED's and SGPIO control lines from HBA are unused.
> >>
> >
> > Yep. The good news is that Rich has been able to control the SM passive backplane
> > (with AMI MG9072 SGPIO chip) LEDs using SPGIO thru LSI SAS2008 HBAs from Linux,
> > using smp_utils tools. Those tools directly send SGPIO commands using mptctl/mpt2ctl interface.
> >
> > The only problem Rich had is with 9211-8i HBAs.. 3 LEDs light up simultanously,
> > which sounds like a firmware/driver bug somewhere..
> >
> > With SAS2308 based HBAs it works properly with the same Supermicro passive backplane,
> > and he has been able to control invidual LEDS thru SGPIO using smp_utils,
> > If I understood the earlier discussion correctly.
> >
> >
> >> The thing is, on 9211-8i and 9240 and probably others, multilane
> >> connectors are wired backwards so that if you connect a normal
> >> ipass-ipass cable, backplane slots will appear in backwards order to
> >> the system. Firmware knows this and slot numbers will appear to be
> >> correct when checking serial numbers etc from bios or with sas2ircu,
> >> but I suspect this is related to SGPIO not working.
> >>
> >
> > Yeah, that's really annoying..
> >
> > I wonder if option "phyPolarity" (mentioned here: http://www.xtremesystems.org/forums/archive/index.php/t-271922.html)
> > affects that ?
> >
> > .. or the "Lane and polarity reversal" feature advertised for LSI SAS2308 based HBAs ?
> > http://www.servethehome.com/lsi-sas-2308-raid-controller-hba-information-listing/
> >
> >
> >> You can get the SGPIO working (using sas2ircu) with
> >> Supermicro-supplied SAS2008 firmware from
> >> ftp://ftp.supermicro.com/driver/SAS/LSI/2008/IT/Firmware/ but as
> >> Supermicro SAS2008 HBA's (AOC-USAS2-L8i) use correct lane order on
> >> multilane connector, SGPIO-controlled LOCATE LED will point to wrong
> >> slot if not used with Supermicro card. Note that Supermicro
> >> backplanes will not light the LED if no HDD is in slot.
> >>
> >
> > Yep..
> >
> >> Tested mainly with Supermicro 846A backplane I think.
> >>
> >> I think I still have a support request open with LSI but haven't
> >> heart back for a long time about this issue..
> >>
> >
> > Me too, they replied once asking what kind of SAS x4 cable I was using,
> > but no replies after that.. I've been pinging them quite a few times,
> > but it seems they've redirected me to /dev/null.
> >
> >> Also I haven't yet tested the new SAS2308 based cards, great if
> >> finally fixed but I kind of doubt it before I see it :)
> >>
> >
> > Hehe :)
> >
> > Thanks,
> >
> > -- Pasi
> >
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [Share Photos]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Photos]     [Yosemite]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

Add to Google Powered by Linux