AIX LPAR FC connection to SAN Post: 303031503

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Operating Systems AIX AIX LPAR FC connection to SAN Post 303031503 by bakunin on Friday 1st of March 2019 11:28:21 AM

03-01-2019

Registered User

Quote:

Originally Posted by Phat

In the HMC profile, I can see there are 3 physical FC assigned to the server as attached.

I also see 6 FC ports which is equivalent from 3x2=6

Exactly. Look at the "location codes" which i have marked bold:

Code:

[root@zzz] / > lsdev -Cc adapter | grep fcs
fcs0 Available 00-00 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)
fcs1 Available 00-01 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)
fcs2 Available 01-00 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)
fcs3 Available 01-01 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)
fcs4 Available 05-00 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)
fcs5 Available 05-01 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)

fcs0 and fcs1 are port 0 and 1 from the same adapter, etc. for the others. In the HMC display you posted you see the "real" (physical) location codes where the adapters are located in the system. I.e. one adapter is located in the CEC with serial number 9K83854 in slot P1-C5.

Quote:

Originally Posted by Phat

Can we say the "physical" FC adapter here are actually the real physical FC adapter from Power Machine which are assigned to the lpar not via VIOS (with virtual FC adapter) ?

Yes, absolutely. The reason for the VIOS is this: you have some "anonymous" resources like memory and CPUs which you can easily transfer between LPARs. You cannot do this with adapters, obviously, because they are connected to something and they are configured on the "outside" too. Neither you can do that with disks because they contain data which makes them the opposite of "anonymous". Therefore there is the VIOS, which takes all the physical ressources, creates virtual constructs representing these and then gives these constructs to the LPAR. This way you can move an LPAR from on managed system to the other because VIOSes ahve special means to transfer the physical layer between one another and for the LPAR the virtual construct it uses never changes - just the way it is representing some physical ressource.

I hope this helps.

bakunin

bakunin

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LEARN ABOUT DEBIAN

fence_vixel

fence_vixel(8)						      System Manager's Manual						    fence_vixel(8)

NAME

       fence_vixel - I/O Fencing agent for Vixel FC switches

SYNOPSIS

       fence_vixel [OPTION]...

DESCRIPTION

       fence_vixel is an I/O Fencing agent which can be used with Vixel FC switches.  It logs into a Vixel switch via telnet and removes the spec-
       ified port from the zone.  Removing the zone access from the port disables the port from being able to access the storage.

       fence_vixel accepts options on the command line as well as from stdin.  fenced sends parameters through stdin  when  it	execs  the  agent.
       fence_vixel can be run by itself with command line options which is useful for testing.

       After  a fence operation has taken place the fenced machine can no longer connect to the Vixel FC switch.  When the fenced machine is ready
       to be brought back into the GFS cluster (after reboot) the port on the Vixel FC switch needs to be enabled. In order to do this,  log  into
       the Vixel FC switch. Then go to:

       config->zones->config <port> <comma-separated-list-of-ports-in-the-zone>

       Then apply

       Consult the Vixel manual for details

       Vendor URL: http://www.emulex.com

OPTIONS

       -a IPaddress
	      IP address of the switch.

       -h     Print out a help message describing available options, then exit.

       -n port
	      The port number to remove zoning from on the switch.

       -p password
	      Password for login.

       -S path
	      Full path to an executable to generate the password for login.

       -V     Print out a version message, then exit.

STDIN PARAMETERS

       agent = < param >
	      This option is used by fence_node(8) and is ignored by fence_vixel.

       ipaddr = < hostname | ip >
	      IP address or hostname of the switch.

       passwd = < param >
	      Password for login.

       passwd_script = < param >
	      Full path to an executable to generate the password for login.

       port = < param >
	      The port number to remove zoning from on the switch.

SEE ALSO

       fence(8), fence_node(8)

																    fence_vixel(8)

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