From: Harri Olin <harri.olin@gmail.com>
To: "Pasi Kärkkäinen" <pasik@iki.fi>
Cc: Rich <rercola@pha.jhu.edu>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>
Subject: Re: Odd behavior of a "SAS-2" backplane with SGPIO commands
Date: Sun, 19 Aug 2012 15:50:00 +0300 [thread overview]
Message-ID: <5030E0F8.5@gmail.com> (raw)
In-Reply-To: <20120819102531.GP19851@reaktio.net>
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.
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.
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.
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..
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 :)
Quick summary about Supermicro backplane models:
T - separate SATA connectors, no SGPIO and no locate LED's
TQ - separate SATA connectors for each slot, separate SGPIO header for
each 4 slot group
A - multilane connector for each 4 slots, SGPIO on multilane connectors
E1 - single expander
E2 - dual expander
E16 - single 6GB expander
E26 - dual 6GB expander
--
Harri.
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next prev parent reply other threads:[~2012-08-19 12:58 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-04 1:54 Odd behavior of a "SAS-2" backplane with SGPIO commands Rich
2012-08-18 23:52 ` Pasi Kärkkäinen
2012-08-19 0:10 ` Rich
2012-08-19 10:25 ` Pasi Kärkkäinen
2012-08-19 12:50 ` Harri Olin [this message]
2012-08-19 13:13 ` Pasi Kärkkäinen
2012-08-19 13:47 ` Rich
2012-08-19 13:56 ` Pasi Kärkkäinen
2012-08-19 14:01 ` Rich
2012-08-19 14:06 ` Pasi Kärkkäinen
2012-09-10 13:47 ` Pasi Kärkkäinen
2012-09-10 16:01 ` Emmanuel Florac
2012-09-10 16:04 ` Pasi Kärkkäinen
2012-09-10 16:07 ` Rich
2012-09-10 16:13 ` Pasi Kärkkäinen
2012-09-10 16:14 ` Rich
2012-09-10 16:25 ` Pasi Kärkkäinen
2012-10-21 12:46 ` Pasi Kärkkäinen
2012-11-01 15:55 ` Rich
2012-11-01 16:04 ` Pasi Kärkkäinen
2012-12-07 13:46 ` Pasi Kärkkäinen
[not found] ` <CAOeNLuroRgZUvFWYTx7yr5ERtEpjiOwQgcy4COCLsm7Z9wWaKw@mail.gmail.com>
2012-12-19 19:40 ` Pasi Kärkkäinen
[not found] ` <CAOeNLuqVPQTsBs1eoizHBcEVbGgLrQOQBxqkV38cGwyKS4UTNA@mail.gmail.com>
2012-12-19 19:41 ` Pasi Kärkkäinen
2013-04-23 0:19 ` Pasi Kärkkäinen
[not found] ` <CAOeNLuo+Pti7LfshpOuzDSwWzdtXw0Ouph7ZAoJ9i7CyaUXiAA@mail.gmail.com>
2013-04-23 0:39 ` Pasi Kärkkäinen
[not found] ` <CAOeNLuqnX9r-jrmq0kV1=kU3XOzFEttDQktcD5338BzaBX3KHg@mail.gmail.com>
2013-08-30 21:42 ` Rich
2013-09-01 17:13 ` Pasi Kärkkäinen
2013-09-02 14:44 ` Pasi Kärkkäinen
2013-10-03 19:11 ` Pasi Kärkkäinen
2013-10-03 20:07 ` Rich
2013-10-03 20:16 ` Pasi Kärkkäinen
2013-10-04 0:07 ` Douglas Gilbert
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