Re: sg utils sg_io -i 0x24 -y "12 00:00:00 24 00"

[Douglas Gilbert <dougg@torque.net>]

Pat LaVarre wrote:
> The SG_IO analogue in BSD may be:
> 
> http://www.google.com/search?q=man+SCIOCCOMMAND
> 
> The corresponding struct appears in such sources as:
> 
> http://cvsup.pt.freebsd.org/cgi-bin/cvsweb/cvsweb.cgi/src/sys/sys/scsiio.h?rev=1.9.4.2&content-type=text/x-cvsweb-markup&cvsroot=NetBSD
> 
> Same as ever, again there we see CDB for length, data for expected
> length returning actual length, sense for expected length returning
> actual length.

Pat,
I don't think the above references are correct. FreeBSD has been
using SCSI's Common Access Method (CAM) for some time. Your can
find one document at www.t10.org (drafts section under the SCSI-2
heading). More appropriate is the withdrawn CAM-3 draft standard (see
www.t10.org/ftp/t10/drafts/cam3/cam3r03.pdf ). That is where you
will find the structure sg_io_hdr was modelled on (struct ccb_scsiio3).

Another way to find SCSI pass-through mechanisms is to look
at Joerg Schilling's libscg. A simpler way may be to look at
smartmontools ( smartmontools.sourceforge.net ) and compare
os_linux.c , os_freebsd.c and os_solaris.c

Doug Gilbert