Date: Mon, 31 Mar 2014 06:29:36 -0700 (PDT) From: "Chris H" <bsd-lists@bsdforge.com> To: "Harald Schmalzbauer" <h.schmalzbauer@omnilan.de> Cc: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: device ada n/ in kernconf, how to omitt for hv_storvsc.ko Message-ID: <0084eb7aeae97ecc37032daaedef4a6e.authenticated@ultimatedns.net> In-Reply-To: <53391CC7.9010308@omnilan.de> References: <53391CC7.9010308@omnilan.de>
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> Hello, > > I'm experimenting with MS-Hyper-V and saw that as soon as hv_storvsc.ko > is loaded, an IDE hdd attaches as 'da' _and_ 'ada' (the former seems to > be called “FastIDE” on “synthetic storage driver” and gains efficiency > for HDD workloads). > > There's the hv_pci_ata_disengage.ko pseudo driver, but that also makes > IDE cdrom unavailable – same as disabling ata/atapci! Can't really get > the idea of that module… > > I'd prefere to disable 'ada' only (leaving cdrom via atapci->ATA_CAM->cd). > But I can't find the place where “device ada” gets defined for kernel > conf. “device ata” is in GENERIC, along with da, sa, scbus etc., but no > 'ada' ?!?. No trace of 'ada' in DEFAULTS either!?! Greetings, Off the top of my head, I /believe/ it's (ada) a part of the ahci implementation. --Chris > > Is there something like hint.ada.disable=1 ? > Can I use “nodevice ada“ to exclude it from my custom kernel? > > Thanks, > > -Harry > >
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