Date: Fri, 18 May 2007 10:32:30 +0000 From: Darren Reed <darrenr@freebsd.org> To: Dag-Erling Sm??rgrav <des@des.no> Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org, Pawel Jakub Dawidek <pjd@freebsd.org>, Joao Barros <joao.barros@gmail.com> Subject: Re: ZFS: amd64, devd, root file system. Message-ID: <20070518103230.GA50946@hub.freebsd.org> In-Reply-To: <86lkfntndt.fsf@dwp.des.no> References: <20070409011723.GB74547@garage.freebsd.pl> <20070409094319.GB76673@garage.freebsd.pl> <70e8236f0704090808y5d305175wdc3cee5be1a26a9@mail.gmail.com> <20070409153338.GH76673@garage.freebsd.pl> <440b3e930705131031v5e97db7fq486d8d17aeb9f622@mail.gmail.com> <20070514070715.GA82322@hub.freebsd.org> <86646vyimg.fsf@dwp.des.no> <20070517124648.GA98052@hub.freebsd.org> <86lkfntndt.fsf@dwp.des.no>
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On Thu, May 17, 2007 at 06:39:58PM +0200, Dag-Erling Sm??rgrav wrote: > Darren Reed <darrenr@freebsd.org> writes: > > Dag-Erling Sm??rgrav <des@des.no> writes: > > > Remember that unlike Sun, we do not make the hardware our OS runs on, > > > nor do we write the firmware for it. > > Do you see my email address as being "@sun.com"? > > No, but ZFS comes from Sun, and Solaris is the only OS that can > currently boot from ZFS; therefore the comparison is germane. Solaris uses grub to boot from ZFS...I don't know how difficult that work was, but ZFS root can't be done with the old-style boot+loader on either sparc/x86. There may be implications in that for FreeBSD too. > My point is that it is a lot more difficult for us to implement ZFS > support in an OS that is intended to run on everything and the kitchen > sink, from the crappiest 486 to the latest quad-core Xeon, with all > kinds of crappy disk controllers, than it is for Sun to do the same in > Solaris, which mostly runs on hardware designed and manufactured by Sun > for the specific purpose of running Solaris. Which is why I'm using FreeBSD+ZFS rather than Solaris+ZFS :-) Maybe more layers are required in FreeBSD disk I/O subsystem to shield things like ZFS from crappy controllers? Darren
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