10-24-2001
In sdX, the X means the device's instance id.
On simple once controller systems, you can pretty much call the instance ID the SCSI target ID I think.
For example, sd6 is usually the CDROM drive which is commonly found on ID6.
That was a simple way if you don't have a lot of controllers.
Otherwise, you can use "sysdef -d" or "prtconf -v". It will give you a heirarchical breakdown of what drivers are attached to what devices, etc. And you can make deteminations of which controllers and which targets they are that way.
It's ugly, I know, but it's the only way I can think of doing what you want. I've had to do this on some E6500 machines before, and let me tell you it was not pretty.
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LEARN ABOUT FREEBSD
devfs
DEVFS(5) BSD File Formats Manual DEVFS(5)
NAME
devfs -- device file system
SYNOPSIS
devfs /dev devfs rw 0 0
DESCRIPTION
The device file system, or devfs, provides access to kernel's device namespace in the global file system namespace. The conventional mount
point is /dev.
The file system includes several directories, links, symbolic links and devices, some of which can also be written. In a chroot'ed environ-
ment, devfs can be used to create a new /dev mount point.
The mknod(8) tool can be used to recover deleted device entries under devfs.
The fdescfs(5) filesystem is an alternate means for populating /dev/fd. The character devices that both devfs and fdescfs(5) present in
/dev/fd correspond to the open file descriptors of the process accessing the directory. devfs only creates files for the standard file
descriptors 0, 1 and 2. fdescfs(5) creates files for all open descriptors.
The options are as follows:
-o options
Use the specified mount options, as described in mount(8). The following devfs file system-specific options are available:
ruleset=ruleset
Set ruleset number ruleset as the current ruleset for the mount-point and apply all its rules. If the ruleset number ruleset
does not exist, an empty ruleset with the number ruleset is created. See devfs(8) for more information on working with devfs
rulesets.
FILES
/dev The normal devfs mount point.
EXAMPLES
To mount a devfs volume located on /mychroot/dev:
mount -t devfs devfs /mychroot/dev
SEE ALSO
fdescfs(5), devfs(8), mount(8)
HISTORY
The devfs file system first appeared in FreeBSD 2.0. It became the preferred method for accessing devices in FreeBSD 5.0 and the only method
in FreeBSD 6.0. The devfs manual page first appeared in FreeBSD 2.2.
AUTHORS
The devfs manual page was written by Mike Pritchard <mpp@FreeBSD.org>.
BSD
February 9, 2012 BSD