----- Original Message ----- From: Alexander Motin <[email protected]> To: [email protected] Date: Sat, 30 Apr 2011 19:48:35 +0300 Subject: Re: Look of boot2, on HDD
> Garrett Cooper wrote: > > 2011/4/29 <[email protected]>: > >> /boot/boot2 STAGE 2 bootstrap file > >> Understands the FreeBSD file system enough, to find files on it, and can > >> provide a simple interface to choose the kernel or loader to run. > >> > >> Once sys is fully booted, HDD is 'ada0'. > >> However, STAGE 2, sees it, as a 'ad4', at boot process, which is same > >> seen, by booted sys, when I turn off AHCI. > >> > >> So, here is the riddle ... > >> On fully booted sys, how do I query STAGE 2, to tell me, how it'll see, my > >> 'ada0' HDD? > > > > This is a very interesting catch: > > > > /usr/src/sys/boot/pc98/boot2/boot2.c:static const char *const > > dev_nm[NDEV] = {"ad", "da", "fd"}; > > /usr/src/sys/boot/i386/boot2/boot2.c:static const char *const > > dev_nm[NDEV] = {"ad", "da", "fd"}; > > > > It probably will be a no-op soon because of some of the > > compatibility changes Alex made, but still a potential point of > > confusion nonetheless. > > Pardon my ignorance, but could somebody shed some light for me on this > list of names? Why much more sophisticated loader(8) operates disks as > diak0/1/..., while boot2 tries to mimic something he has no any idea > about, using very limited information from random sources? Does this > names important for anything? > > Even with old ATA names didn't match on my laptop: boot2 reports ad0, > while system - ad4. Also we have a lot of drivers who's disk names don't > fit into this set of ad, da and fd. > > -- > Alexander Motin Well ..., ATM, I say lets NOT touch/edit boot2 nor loader. Let them continue to see devices, the way they "like" ... NOW, all I would like, is to find a way of ASKING them, how will they see "$target" device, at theirs boot step/time. "Asking" is done, on a fully booted sys and I am interested in asking STAGE 2 (boot2). Domagoj Smolčić _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
