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Date: Fri, 9 Sep 2005 22:58:06 -0500
From: Dan Nelson <dnelson@allantgroup.com>
To: Danny Howard <dannyman@toldme.com>
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Cc: freebsd-scsi@freebsd.org, freebsd-questions@freebsd.org
Subject: Re: Fibre Channel disks to two Systems?
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In the last episode (Sep 09), Danny Howard said:
> As I understand it, I can have an FC loop with one or more drives,
> connected to two servers, and either server can talk to one or the
> other drives exclusively.  My QUESTION is: how is the arbitration
> done in FreeBSD?  You run camcontrol on either server and activate /
> deactivate drives in the loop?

Easiest way is with something like ports/sysutils/heartbeat.  No device
locking is needed.  Have the start script do a quick fsck, mount the
device, and start your server processes (or if pgsql can use raw disk
devices like Oracle, skip the fsck and mount steps).

-- 
	Dan Nelson
	dnelson@allantgroup.com