freebsd stable - Feb 2006 - Forcing a da* numbering scheme.

Hi -

What's the proper method these days for defining a static naming scheme
for direct access devices (da*)?

In this case, I have two systems (one 5.1 and one 6.0) connected to a
read-only RAID appliance (via FibreChannel) while having two SCSI disks
onboard for the OS and applications.  With the 5.4 system, the onboard
SCSI disks take up da{0,1} and the FibreChannel connected devices fall
behind it. With the 6.0 system it's the reverse, with the onboard disks
taking up the end of the line, which causes more than a little havoc w/
fstab when we add more read-only devices over FibreChannel and the boot
partition keeps moving because of it... :(

It used to be in the 4.x days you could define the da* in the kernel and
tie it to it's SCSI ID, is that still the case now, or is there some
boot-time variable in /boot/loader.conf that is now preferred?

-Peter
-- 
[ http://www.plosh.net/ ] - "Earth Halted: Please reboot to continue"

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bOn Tue, 2006-02-21 at 22:59 -0800, Peter Losher wrote:
> What's the proper method these days for defining a static naming scheme
> for direct access devices (da*)?
/boot/device.hints

hint.scbus.0.at="ahc0"
hint.da.0.at="scbus0"
hint.da.0.target="0"
hint.da.1.at="scbus0"
hint.da.1.target="1"

hint.scbus.1.at="ahc1"
hint.da.100.at="scbus1"
hint.da.100.target="0"
hint.da.101.at="scbus1"
hint.da.101.target="1"

etc.
-- 
Frank Mayhar frank@exit.com     http://www.exit.com/
Exit Consulting                 http://www.gpsclock.com/
                                http://www.exit.com/blog/frank/

Peter Losher wrote:
> What's the proper method these days for defining a static 
> naming scheme for direct access devices (da*)?
man glabel

Easy to use, works on any GEOM-aware storage medium (SCSI, ATA, USB,
...).

/Daniel Eriksson