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Operating Systems AIX [ASK] - AIX Fibre Channel behavior Post 303031938 by Phat on Friday 8th of March 2019 02:41:19 AM
Old 03-08-2019
Hi Bakunin,

You are right. I'm not so understand well the FC work, zoning work, and IBM virtualization work.
Just want to know the FC port work and multipath(redundant) work.

We talk about another aspect. For example, if you have 2 FC cards, each has 2 ports. So 4 ports are connected to the LUN. Assuming that, 3 ports failed and we have only 1 port. So we still can see the LUN? and in case 2 ports failed, we can see the LUN? In regard redundant, with 4 line connected to LUN, the system is only down if 4 lines were down/broken, even if 1 line is still available, the system still running. Please correct me this.

I'm surprised is that in my environment I can see the LUN on 2 still-working FC cards, but not boot device. After 1 more FC is up again, I can see. So confused about this.
 

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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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