Date: Fri, 24 May 1996 13:19:36 +0100 (GMT-1) From: af@biomath.jussieu.fr To: murduth@ludd.luth.se (Joakim Henriksson) Cc: freebsd-scsi@freebsd.org Subject: Re: How to send "start unit" to disk during boot? (solved) Message-ID: <199605241219.NAA00236@garfield.biomath.jussieu.fr> In-Reply-To: <199605240829.KAA05378@zero.ludd.luth.se> from "Joakim Henriksson" at May 24, 96 10:29:31 am
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>
> > I have been given a DEC RZ24 (200Mb) SCSI disk which I have
> > successfully connected to my PC (133Mhz Pentium, Intel Endeavour m/b,
> > AHA2940 controller, IDE boot disk). This disk, like some other DEC
> > disks, does *not* spin up when powered up. Other DEC disks have
> > jumpers to change this, the RZ24 doesn't seem to have them.
>
> Some of the Digital (all?) rz disks have the spinup parameter in one of the
> vendor specific mode pages of the scsi disk. Try something like
> "scsi -f /dev/rsd?c -m 37 -e -P 3" and change the spinup value to 0 the page
> referenced in the m parameter might be diferent. To find out which page it
> is you should do "scsi -f /dev/rsd?c -m ??" where ?? is from 0x01 to 0x3f
> but maybe in decimal, someone a bit more knowledgable about the scsi command
> help me out! I have only done this on a VAX station using the rzdisk utility
> which works just like scsi but on rz disks :)
>
Just right, Joakim ! scsi(8) needs a template description in
/usr/share/misc/scsi_modes to allow the editing of the corresponding
mode page. I added the following:
# DEC RZ disks
0x25 {
{Spinup on power up} i1
}
And then I did "scsi -f /dev/rsd0c -m 37 -e -P 3", changed the value
to 0, saved the result and voila, I'm a happy camper now ! My RZ24
spins up at power on. Saves me *much* time and frustration.
J"org, I didn't need the source code patch for sd.c you suggested, so
I can't tell. My feeling is that the mount fails precisely because
there is no delay between the sending of the "start unit" command and
the subsequent operations. But I might be misled.
Many, *many* thanks to all for your kind help... Now I have to
eventually fix the hardware problems I still have on that motherboard
or memory :-(
Have a good day,
_Alain_
--
Alain FAUCONNET Ingenieur systeme - System Manager AP-HP/SIM
Public Health 91 bld de l'Hopital 75013 PARIS FRANCE
Medical Computing Research Labs Mail: af@biomath.jussieu.fr
Tel: (+33) 1-40-77-96-19 Fax: (+33) 1-45-86-80-68
I've RTFMed. It says: "Refer to your system administrator"
But... I *am* the system administrator :-]
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