Date: Fri, 16 Sep 2011 16:30:08 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: Boris Kochergin <spawk@acm.poly.edu> Cc: freebsd-current <freebsd-current@FreeBSD.org> Subject: Re: Thinkpad CD-ROM hotplug with ATA_CAM Message-ID: <4E734F60.4070005@FreeBSD.org> In-Reply-To: <4E734749.2010106@acm.poly.edu> References: <4E70C404.3010104@acm.poly.edu> <4E70D30E.6080002@FreeBSD.org> <4E734749.2010106@acm.poly.edu>
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on 16/09/2011 15:55 Boris Kochergin said the following: > On 09/14/11 12:15, Andriy Gapon wrote: >> on 14/09/2011 18:11 Boris Kochergin said the following: >>> camcontrol rescan all >> I think that this command may screw up communication between kernel and HDD from >> which the OS runs. > > It works under normal circumstances--I can run "camcontrol rescan all" on a system > with ATA_CAM and the root filesystem isn't disturbed. > >> Perhaps using a specific bus number would work better. >> > > Somewhat, but results are still undesirable. "camcontrol rescan 1" (the CD-ROM is > listed as being on scbus1) executes, stays in the cbwait state for 30 seconds, > then the system locks up. > > "camcontrol reset 1" has the same behavior as "camcontrol rescan all" in that the > system locks up instantly. Weird. Can you provoke a panic when that happens? Maybe you can contact mav@ directly and he'd be interested in debugging this case. -- Andriy Gapon
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