From: Jeff Johnson <jeff.johnson@aeoncomputing.com>
To: linux-scsi@vger.kernel.org
Subject: Is it possible to issue device reset to PMC PM8388 expander using sg3_utils or smp_utils?
Date: Thu, 09 Dec 2010 10:41:00 -0800 [thread overview]
Message-ID: <4D0122BC.8060501@aeoncomputing.com> (raw)
Greetings,
Is it possible to issue a low level device reset to a PMC-Sierra PM8388
24x3G SAS expander using either sg3_utils or smp_utils?
I am able to enumerate and read the status of the phys on the PM8388,
read end device information, etc. I tried sg_reset and it does a bus
reset but not an expander reset.
Technical documentation on the PM8388 is not readily available so I do
not know if it has a mode select bit or other special method to get the
expander to reset itself.
I am looking for an inband method to reset the expander to clear a
condition where some phys in a wide connection fail to link. A power
cycle clears the condition and I am looking to mimic a power cycle by
bouncing the expander at the lowest level possible via the SAS host
connection.
Thank you.
--Jeff
next reply other threads:[~2010-12-09 18:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-09 18:41 Jeff Johnson [this message]
2010-12-09 18:59 ` Is it possible to issue device reset to PMC PM8388 expander using sg3_utils or smp_utils? James Bottomley
2010-12-09 19:05 ` Jeff Johnson
2010-12-09 20:53 ` Douglas Gilbert
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