Date: Tue, 14 Oct 2008 23:32:39 +0200 From: Max Laier <max@love2party.net> To: freebsd-current@freebsd.org Cc: Daniel Jameson <DJameson@emerytelcom.com> Subject: Re: ZFS attaching direct access drives as Scsibus#target#drive# Message-ID: <200810142332.39791.max@love2party.net> In-Reply-To: <0A8710FF880BBB4687AEC66F9DCF7D0C26B462@SERVER1.emerytelcom.com> References: <0A8710FF880BBB4687AEC66F9DCF7D0C26B462@SERVER1.emerytelcom.com>
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On Tuesday 14 October 2008 21:56:01 Daniel Jameson wrote: > I'm in the process of building several zfs pools for a backup-server, > the machine has 2 24 port sata 3 controllers and 48 1TB drives for > storage. I've done a little testing and found that building a pool by > using the da# device names can be inconsistent. For example if a device > is lost from the first controller and the box is re-booted all the da#s > shuffle up, which creates problems with adjacent pools, and the > potential for catastrophic failure. In the Sun documentation zpool > allows a pool to be built by using S#T#D# (Scsibus Target Drive) syntax, > when I attempt it in FBSD It returns:" cannot use '/dev/c0t0d0': must be > a GEOM provider" does anyone know a way to statically map a > scsibus/target/drive to a specific da# or a fix to allow specific drives > by target numbers to be added to a zpool? I though there was some magic to map devices by UID ... but I can't seem to find references to it right now. You can use glabel, however, and build the pool from the labeled devices instead. glabel disk0 /dev/da0 glabel disk1 /dev/da1 ... zpool create tank /dev/label/disk0 /dev/label/disk1 ... This will loose one sector at the end, but should otherwise have no negative effects. But you can juggle around devices as much as you like. -- /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News
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