Date: Fri, 20 Jul 2012 09:40:42 +0200 From: dennis berger <db@nipsi.de> To: freebsd-fs@freebsd.org Subject: ISCSI on zvols with two maschines. What needs to be done? Message-ID: <7FE7A5F3-53FF-4508-A3D6-562E8FA9764D@nipsi.de>
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Hi folks, The following question often comes to me, when I speak to my customers. Is it possible to attach two systems to the same storage array using shared SAS and use istgt + zfs to provide a reliable ISCSI target. This could be active/passive or later active/active. In case it's not possible, what needs to be done? The questions that came into my mind. Can I connect two freebsd to the storage and boot them up? Just that both systems would see the physical devices. Can I start ZFS on both systems without writing on it? I would like to use just block devices for ISCSI. Is everything still consistent? Does starting ZFS up already writing some sort of meta data to the physical devices?! Can I start istgt on both systems without actually using the istgt on one system?! Then CARP would be enough, wouldn't it. Or in case of active/active extend istgt to communicate with the other istgt to not hand out a device twice? Best, -dennishelp
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