On Fri, Sep 16, 2011 at 6:30 AM, Andriy Gapon <avg_at_freebsd.org> wrote: > 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_at_ directly and he'd be interested in debugging this case. I fear that BIOS may have some issue. I have a T43 and found that, if I booted with the DVD installed, atacontrol (this was prior to ATA-CAM) would allow me to detach, but if I then inserted a hard drive and tried to attach it, the system would lock up. If I booted with a hard drive in the bay, I could detach, change drives, and attach with no problems. I don't recall if I could replace the hard drive with a DVD, though and I don't have physical access to that system ATM. Still, this sounds rather similar to what I saw and it was unique to the T43. I have had several other ThinkPads, all of which allow me to swap out the DVD for a different drive including the T520 I am using to enter this reply. -- R. Kevin Oberman, Network Engineer - Retired E-mail: kob6558_at_gmail.comReceived on Fri Sep 16 2011 - 14:03:38 UTC
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