Date: Fri, 12 Jan 2001 04:20:06 -0800 (PST) From: Jan Grant <Jan.Grant@bristol.ac.uk> To: freebsd-bugs@FreeBSD.org Subject: Re: i386/24272: ATAPI CD open causes "ticks" on IDE drive Message-ID: <200101121220.f0CCK6D24635@freefall.freebsd.org>
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The following reply was made to PR i386/24272; it has been noted by GNATS. From: Jan Grant <Jan.Grant@bristol.ac.uk> To: Soren Schmidt <sos@freebsd.dk> Cc: jan.grant@bristol.ac.uk, FreeBSD-gnats-submit@FreeBSD.ORG Subject: Re: i386/24272: ATAPI CD open causes "ticks" on IDE drive Date: Fri, 12 Jan 2001 12:10:42 +0000 (GMT) On Fri, 12 Jan 2001, Soren Schmidt wrote: > Hmm, if kscd is polling the drive once a second, and you have both > disk and CDROM on the primary, I'd bet those blinking lights are > from accesses to the CDROM and not the disk... > > However in you probemessages above disk and CDROM are located on > seperate controllers, so now what gives ? As I said, it really does sound like the hard drive head is "ticking"; there is a separate CD-rom activity light and both lights generally only come on during activity of the appropriate device. Yes, the two devices _are_ on separate controllers. It may be that the hardware causes both devices/controllers to jump on a tray-close; I'm not a hardware expert. In either case, it is definitely being caused by the tray-close-on-open CD behaviour (which I'd contend is pretty broken; if such behaviour is required by a user program, it can close the tray itself). In other words, I think the recent change in behaviour is broken; it just so happens that it's come to light due to kscd. -- jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/ Tel +44(0)117 9287163 Fax +44 (0)117 9287112 RFC822 jan.grant@bris.ac.uk Whenever I see a dog salivate I get an insatiable urge to ring a bell. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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