Date: Mon, 17 Aug 2009 18:31:44 +0200 From: Juergen Lock <nox@jelal.kn-bremen.de> To: freebsd-current@FreeBSD.org, mav@FreeBSD.org Subject: most simple way to hang ahci(4): camcontrol tur on ada disks Message-ID: <20090817163144.GA2991@triton8.kn-bremen.de>
next in thread | raw e-mail | index | archive | help
Hi! After looking again at my `cdrecord -scanbus -V' log... http://lists.freebsd.org/pipermail/freebsd-current/2009-August/010660.html ...I remembered camcontrol(8) can send the test unit ready command as well, so I booted into single user (to avoid having to fsck again) and tried it - and lo and behold, the first `ls' afterwards hung again. So its not something weird cdrecord/cdrdao do, a simple test unit ready is enough to reproduce it, or at least here... (My guess is this has something to do with the fact that sata disks are not atapi i.e. don't speak scsi commands by default so the test unit ready would have to be either emulated or translated and there's probably something missing or broken in that code? Or maybe scsi commands should just be rejected on non-atapi sata devices for now?) HTH, Juergen
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20090817163144.GA2991>