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Date:      Fri, 23 Apr 1999 00:51:33 +0100
From:      Mark Ovens <marko@uk.radan.com>
To:        Doug White <dwhite@resnet.uoregon.edu>
Cc:        Darren Pilgrim <dpilgrim@uswest.net>, "Francis Percival C. Favoreal" <dune@cats.edu.ph>, freebsd-questions@freebsd.org, freebsd-isp@freebsd.org
Subject:   Re: SCSI problem
Message-ID:  <19990423005133.B266@marder-1>
In-Reply-To: <Pine.BSF.4.03.9904221136420.7869-100000@resnet.uoregon.edu>; from Doug White on Thu, Apr 22, 1999 at 11:37:07AM -0700
References:  <371E6704.B6E8A560@uswest.net> <Pine.BSF.4.03.9904221136420.7869-100000@resnet.uoregon.edu>

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On Thu, Apr 22, 1999 at 11:37:07AM -0700, Doug White wrote:
> On Wed, 21 Apr 1999, Darren Pilgrim wrote:
> 
> > Mark Ovens wrote:
> > <brevity snip>
> > > Just a thought but this couldn't be caused by (SCSI) BIOS settings
> > > could it? I only ask because I've just added a second SCSI HD to my
> > > system and it exhibits similar behaviour, although it never fails to
> > > start.
> > > 
> > > The original disk is an IBM Ultrastar 2ES U/W and that spins up as
> > > soon as the power is switched on but the new disk, IBM Ultrastar 9ES
> > > U/W, doesn't spin up until the SCSI controller probes it (I thought
> > > I'd forgotten to connect the power lead the first time I powered up
> > > after installing it).
> > > 
> > > The SCSI card is a Diamond Fireport (NCR/Symbios 53c875 chip). It
> > > seems strange that one disk spins up immediately and the other waits
> > > until it's probed, but since it always spins up and works without
> > > problems I've never bothered investigating further.
> > 
> > Some of the SCSI HBAs I have stage the spin-ups to avoid overloading
> > the power supply.  Perhaps this might be the cause?
> 
> Some drives can be keyed this way too by pulling off the auto-spinup
> jumper.  We have an IBM drive that acts this way -- it's annoying! :)
> 

So do I (see another post from me in this thread) it doesn't spin
up 'til FreeBSD probes it.

> Doug White                               
> Internet:  dwhite@resnet.uoregon.edu    | FreeBSD: The Power to Serve
> http://gladstone.uoregon.edu/~dwhite    | www.freebsd.org
> 
> 

-- 
      FreeBSD - The Power To Serve http://www.freebsd.org
      My Webpage http://www.users.globalnet.co.uk/~markov
_______________________________________________________________
Mark Ovens, CNC Apps Engineer, Radan Computational Ltd. Bath UK
CAD/CAM solutions for Sheetmetal Working Industry
mailto:marko@uk.radan.com                  http://www.radan.com



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