Date: Fri, 31 Oct 2008 13:12:29 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Javier =?utf-8?Q?Mart=C3=ADn?= Rueda <jmrueda@diatel.upm.es> Cc: freebsd-current@freebsd.org, Daniel Jameson <DJameson@emerytelcom.com> Subject: Re: ZFS attaching direct access drives as Scsibus#target#drive# Message-ID: <20081031181229.GC47647@dan.emsphone.com> In-Reply-To: <490B3FB2.2040106@diatel.upm.es> References: <0A8710FF880BBB4687AEC66F9DCF7D0C26B462@SERVER1.emerytelcom.com> <490B3FB2.2040106@diatel.upm.es>
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In the last episode (Oct 31), Javier MartÃn Rueda said:
> Daniel Jameson escribió:
> > 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?
>
> You can edit /boot/device.hints to associate specific SCSI ids to
> specific da entries. Try something like this:
Another method is to use glabel to label your devices, then build your
zpools on the labeled devices:
(root@dan) /root># glabel status
Name Status Components
label/da0_zfs_local N/A da0s1d
label/da1_zfs_local N/A da1s1d
(root@dan) /root># zpool status
pool: local
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
local ONLINE 0 0 0
mirror ONLINE 0 0 0
label/da1_zfs_local ONLINE 0 0 0
label/da0_zfs_local ONLINE 0 0 0
errors: No known data errors
--
Dan Nelson
dnelson@allantgroup.com
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