On Mon, Mar 17, 2008 at 5:56 PM, nate <centos at linuxpowered.net> wrote: > I see in the release notes that SAN boot is supported, but > doesn't give any special instructions. > > Anyone else booting CentOS directly from a FC SAN ? Any > special considerations needed for multipathing and > stuff when booting ? Use the 'mpath' when you're installing, and that should pretty much take care of it. The one issue that we had is that the Centos/RHEL mpath option defaults to active/active pathing, so storage systems that use active/passive (like our DS4700) can get angry unless you change the configuration after install. Also, I've heard reports of some folks having delays with older HBAs like the qla23xx, needed a longer timeout than the 250 listed in /proc/scsi/scsi. I've not confirmed this, and it could simply be related to the way the san is cabled up or how the zones are defined. -- During times of universal deceit, telling the truth becomes a revolutionary act. George Orwell