Date: Wed, 9 Dec 2009 11:42:31 -0800 (PST) From: James Phillips <anti_spam256@yahoo.ca> To: freebsd-questions@freebsd.org Subject: Re: Dangerously Dedicated (was: How do I create large ...) Message-ID: <675083.74248.qm@web65510.mail.ac4.yahoo.com> In-Reply-To: <20091209002231.EB7D01065741@hub.freebsd.org>
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> Date: Tue, 8 Dec 2009 22:00:29 +0100 > From: Polytropon <freebsd@edvax.de> > Subject: Re: How do I create large partitions in FreeBSD? > To: krad <kraduk@googlemail.com> > Cc: Peter Steele <psteele@maxiscale.com>, > =A0=A0=A0 "freebsd-questions@freebsd.org" > <freebsd-questions@freebsd.org> > Message-ID: <20091208220029.2052102f.freebsd@edvax.de> > Content-Type: text/plain; charset=3DUS-ASCII >=20 > On Tue, 8 Dec 2009 20:52:52 +0000, krad <kraduk@googlemail.com> > wrote: > > stay away from dangerously dedicated it seems as > though they are being > > phased out >=20 > I've followed the related discussion, but I'm not sure > what > to conclude from it... as far as I understood, creating an > installation "dangerously dedicated" mode isn't possible > from sysinstall anymore, but still possible via the > command > line tools. I don't see a reason why it is considered to > be > something bad, but the inclusion of a "carrier slice" for > the OS's partitions has always been recommended. But for > data disks where only one partition is intended, why > create > it inside a slice? >=20 I sort of followed the discussion as well. There was some=20 disagreement about what "dangreously dedicated" means. Does it mean=20 getting rid of the DOS partition table (slices?) Or, does it mean=20 creating a slice or disks without BSD partitions? The Handbook (18.3)=20 says: "If the disk is going to be truly dedicated to FreeBSD, you=20 can use the dedicated mode. Otherwise, FreeBSD will have to live=20 within one of the PC BIOS partitions. FreeBSD calls the PC BIOS=20 partitions slices so as not to confuse them with traditional BSD=20 partitions."=20 The programer in charge of the change seemed to indicate that the=20 "Dangerously dedicated" mode (I assume that means no BSD partititons)=20 conflicts with "GEOM: Modular Disk Transformation Framework." GEOM=20 appears to be an asbtraction layer for accessing various disks. With=20 the move underway to start accessing all disk as SCSI(3 is device=20 independent (with translation help)) devices, it probably makes for=20 more elegant code. Handbook (19.2 GEOM Introduction) reads: "GEOM permits access and control to classes -- Master Boot Records,=20 BSD labels, etc -- through the use of providers, or the special files=20 in /dev. Supporting various software RAID configurations, GEOM will=20 transparently provide access to the operating system and operating=20 system utilities."=20 The important thing in that quote is that "BSD labels" (and Master=20 Boot Records) are mentioned specificly.=20 Regards, James Phillips=0A=0A=0A ______________________________________________= ____________________=0AYahoo! Canada Toolbar: Search from anywhere on the w= eb, and bookmark your favourite sites. Download it now=0Ahttp://ca.toolbar.= yahoo.com.
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