Date: Thu, 12 Aug 1999 21:45:55 -0700 (PDT) From: Mike Meyer <mwm@phone.net> To: freebsd-stable@freebsd.org Subject: Re: On freezes in 3.2-Stable Message-ID: <Pine.BSF.4.10.9908122141570.94664-100000@guru.phone.net> In-Reply-To: <199908130437.AAA00518@bellsouth.net>
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On Fri, 13 Aug 1999, W Gerald Hicks wrote: :->When I kept up with the numbers for these things in a former :->life working for a disk manufacturer, I was always astounded :->at how much current the drives pulled during their power-on :->sequence. After startup, current begins to taper off rapidly. This stopped being relevant a long time ago, but... DEC MIPS-based workstations worked around this problem by having tweaked PROMs on their SCSI drives, with a SPIN-UP-ON-POWERON bit that defaulted to off. Ultrix would send the drives the SCSI command to spin them up - *after* everything else in the system was powered on. This meant they could use a cheaper power supply, as no supported configuration required it to deal with more than one drive spinning up at a time. Dealing with this was the *least* of the problems in trying to use DEC SCSI drives on other platforms. But they could be made to work. <mike To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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