On 24/11/10 11:02 AM, Peter Taps wrote:
Folks,
This is a newbie question.
For a custom server, we plan to use LSI 9211-8i for the internal
storage and LSI 9200-se for externally connected JBODs.
Assuming both the cards can be driven by mpt_sas, how do the cards
manifest themselves under OpenSolaris? Is there a directory entry created
for each card under /devices directory? Also, if you have multiple
external JBODs, is there a directory entry for each JBOD?
Hi Peter,
They would be separate instances of the driver. When you
run "prtconf -v" you will likely see them as
mpt_sas, instance #0
and
mpt_sas, instance #1
The /dev and /devices directory hierarchies are not "real"
in the same way that /usr/bin is "real" - they are a convenient
on-disk representation of the kernel's concept of your
current device tree. You would, however, see different paths
to each controller.
I have two mpt cards (precursor to mpt_sas) in my system, and they
show up in /devices like so:
/devices/p...@0,0/pci10de,3...@a/pci1000,3...@0
and
/devices/p...@ff,0/pci10de,3...@f/pci1000,3150@
When I look at /p...@0,0 in my prtconf output, that shows up as
pci, instance #0
Likewise, /p...@ff,0 is
pci, instance #1
JBODs themselves won't have a directory entry, unless they have
a SES (SCSI Enclosure Services) device, in which case you would
see an entry for each ses node in /dev/es.
James C. McPherson
--
Oracle
http://www.jmcp.homeunix.com/blog
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