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Full Discussion: AIX 5.3 MPIO vs RDAC on DS4000 range
Operating Systems AIX AIX 5.3 MPIO vs RDAC on DS4000 range Post 302244404 by kimyo on Wednesday 8th of October 2008 02:06:15 AM
Old 10-08-2008
AIX 5.3 MPIO vs RDAC on DS4000 range
Hi

I would like to ask what the benefits are of changing from RDAC to MPIO when connecting to a DS4000 on AIX 5.3? I have heard that IBM MPIO "might" support more than 1 active path to a LUN when connecting to a DS4800 through more than 1 host connection on the same AIX client. I understand that this will require specific AIX levels as well as DS4000 firmware levels. I am currently converting from 2 seperate VIO servers in one system to dual redundant path VIOS. Thus I will need MPIO on the VIO clients. However is it advised to run MPIO on the VIOS as well? and are there benifits in changing to MPIO on AIX 5.3 from RDAC?

Thanx
 

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LEARN ABOUT CENTOS

sg_rdac

SG_RDAC(8)							     SG3_UTILS								SG_RDAC(8)

NAME

       sg_rdac - display or modify SCSI RDAC Redundant Controller mode page

SYNOPSIS

       sg_rdac [-a] [-f=LUN] [-v] [-V] DEVICE

DESCRIPTION

       sg_rdac	displays  or  modifies	the RDAC controller settings via the Redundant Controller mode page (0x2C). When modifying the settings it
       allows to transfer the ownership of individual drives to the controller the command was received on.

OPTIONS

       -a     Transfer all (visible) devices

       -f=LUN Transfer the device identified by LUN. This command will only work if the controller supports 'Dual Active Mode' (aka  active/active
	      mode).

       -v     be verbose

       -V     print version string then exit

EXIT STATUS

       The exit status of sg_rdac is 0 when it is successful. Otherwise see the sg3_utils(8) man page.

AUTHOR

       Written by Hannes Reinecke <hare at suse dot com>, based on sg_emc_trespass.

REPORTING BUGS

       Report bugs to <dgilbert at interlog dot com>.

COPYRIGHT

       Copyright (C) 2006-2012 Hannes Reinecke, Douglas Gilbert.
       This  software  is distributed under the GPL version 2. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
       POSE.

sg3_utils-1.35							   November 2012							SG_RDAC(8)
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