Re: loader.conf and rootdev option for memory disk
Date: Sun, 20 Nov 2022 01:00:46 UTC
But your previous post shows rootdev= there didn't work, and needed setting vfs.root.mountfrom=. OTOH, rootdev= is reported to work in efi/boot/freebsd/loader.env (with efi loader) on freebsd-users-jp ML (as it's Japanese ML, in Japanese) this year. So /boot/defaults/loader.conf (/usr/src/stand/defaults/loader.conf) should be fixed, and what should be set in loader.env should be documented. *Dedicated brand-new manpage or in boot.8 (or in loader.8 describing rootdev, or loader.conf.8 in contrast with itself). On Sat, 19 Nov 2022 22:31:42 +0100 Chlasták Miroslav <mira@chlastak.cz> wrote: > Look at the file /boot/defaults/loader.conf: > > … > ### Initial memory disk settings ########################### > #mdroot_load="YES" # The "mdroot" prefix is arbitrary. > #mdroot_type="md_image" # Create md(4) disk at boot. > #mdroot_name="/boot/root.img" # Path to a file containing the image. > #rootdev="ufs:/dev/md0" # Set the root filesystem to md(4) device. > … > > — > Mira > > > On 19 Nov 2022, at 21:58, Tomoaki AOKI <junchoon@dec.sakura.ne.jp> wrote: > > > > IIUC, rootdev should be set in loader.env, if needed. > > `man 5 loader.conf` has nothing about rootdev variable. > > > > (It's undocumented, IIRC.) > > > > > > On Sat, 19 Nov 2022 19:57:47 +0100 > > Chlasták Miroslav <mira@chlastak.cz <mailto:mira@chlastak.cz>> wrote: > > > >> I have my device working for now - but the question is - Is the documentation and example for “rootdev” right or not? > >> > >> — > >> Mira > >> > >>> On 18 Nov 2022, at 21:13, Warner Losh <imp@bsdimp.com <mailto:imp@bsdimp.com>> wrote: > >>> > >>> > >>> > >>> On Fri, Nov 18, 2022 at 12:57 PM Chlasták Miroslav <mira@chlastak.cz <mailto:mira@chlastak.cz> <mailto:mira@chlastak.cz <mailto:mira@chlastak.cz>>> wrote: > >>> Hi all, > >>> > >>> In the /boot/defaults/loader.conf are these options for memory disk settings: > >>> > >>> #mdroot_load="YES" # The "mdroot" prefix is arbitrary. > >>> #mdroot_type="md_image" # Create md(4) disk at boot. > >>> #mdroot_name="/boot/root.img" # Path to a file containing the image. > >>> #rootdev="ufs:/dev/md0" # Set the root filesystem to md(4) device. > >>> > >>> > >>> But - is this example for rootdev option still right? Because “ufs:/dev/md0” works fine on freebsd 12.1, but on freebsd 12.3 this does not work and generates error message: > >>> > >>> Can’t determine root device > >>> > >>> > >>> When I use this option with value “/dev/md0” or “md0” (even with this option commented out), so the machine boots correctly without any error. > >>> > >>> I think you want vfs.root.mountfrom= instead of rootdev= here. > >>> > >>> Warner > >>> > >>> — > >>> Mira > >> > > > > > > -- > > 青木 知明 [Tomoaki AOKI] <junchoon@dec.sakura.ne.jp <mailto:junchoon@dec.sakura.ne.jp>> > -- 青木 知明 [Tomoaki AOKI] <junchoon@dec.sakura.ne.jp>