Date: Thu, 8 Oct 1998 15:58:51 -0400 From: "David E. Cross" <crossd@void.cs.rpi.edu> To: Terry Lambert <tlambert@primenet.com> Cc: Mike Smith <mike@smith.net.au>, Marius.Bendiksen@scancall.no, toasty@home.dragondata.com, freebsd-current@FreeBSD.ORG Subject: Re: CDROM as system disk Message-ID: <Pine.SGI.4.04.9810081555490.1189-100000@void.cs.rpi.edu> In-Reply-To: <199810081905.MAA26707@usr08.primenet.com>
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On Thu, 8 Oct 1998, Terry Lambert wrote: > > It's determined by the drive, not the driver. None of our drivers > > spin the CDROM down intentionally. > > > > Many drives don't offer any standard way of disabling the spindown; > > you're basically stuck with it. > > I thought you could avoid spindown by reading the thing... >^). Slight problem, disk caching. If you are going to ping the drive every N time units as a 'keep-alive', those blocks will very quickly get cached; unless you devise some clever algorithm that will always ensure that you get a block not in the cache (consider the cache could me a megabyte or more in size, and this gets tricky) -- David Cross To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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