Date: Fri, 24 May 1996 11:53:52 -0700 (PDT) From: Jaye Mathisen <mrcpu@cdsnet.net> To: hdalog@zipnet.net Cc: Joakim Henriksson <murduth@ludd.luth.se>, af@biomath.jussieu.fr, freebsd-scsi@freebsd.org Subject: Re: How to send "start unit" to disk during boot? Message-ID: <Pine.NEB.3.92.960524115328.3994Q-100000@schizo.cdsnet.net> In-Reply-To: <199605241657.MAA24459@hda>
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Well, the adaptec bios will send a start unit if you set it up that way in the ^A stuff, which seems the simplest, unless I missed something previous. On Fri, 24 May 1996, Peter Dufault wrote: > > > > > 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 :) > > All numbers inside the command format argument are in hex to match > the SCSI spec. All arguments interpreted by the command format > are read using strtol with 0 base and so are default decimal, hex > if preceded by "0x" and octal if preceded by "0". > > scsi(8) won't edit mode pages without a format descriptor in > scsi_modes, though, so you'll need documentation on that mode page. > > Peter > > -- > Peter Dufault Real-Time Machine Control and Simulation > HD Associates, Inc. Voice: 508 433 6936 > dufault@hda.com Fax: 508 433 5267 >
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