Date: Tue, 23 Jan 2007 19:26:26 +0200 From: Apatewna <apatewna@yahoo.gr> To: FreeBSD Users Questions <freebsd-questions@freebsd.org> Subject: Re: hardware mirrors recognized as individual disks in fbsd Message-ID: <45B64542.6000600@yahoo.gr> In-Reply-To: <20070123151832.GB15419@gizmo.acns.msu.edu> References: <539c60b90701161033v5e316ef4m19332bd6e86ab67b@mail.gmail.com> <20070123011659.GD22569@dfwdamian.vail> <20070123151832.GB15419@gizmo.acns.msu.edu>
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> On Mon, Jan 22, 2007 at 07:16:59PM -0600, Damian Wiest wrote: > >>> >>> Forging ahead, I get ready to start playing the mounting game, but >>> lo-and-behold, suddenly I have 4 disks whereas in windows I had two. Now I >>> praise FreeBSD for it's superior intellect here, but now I have a problem. >>> I want two 160GB mirrored volumes, not 4 unmirrored ones. The RAID is an >>> ASUS P5DR1-VM motherboard with a ULI raid chipset onboard. Very nice setup >>> for the money. >>> >>> Is this normal? Am I going to break my mirror if I mount a single disk? If >>> so, how do I mount a mirror? I have a Gigabyte motherboard GA-7N400Pro2 with an onboard IDE RAID controller IT8212F. Two IDE disks of 80GB connected on it. I have created a RADI-1 volume using the onboard RAID utility and partitioned the volume (50-50) while installing windows. In windows I could see two primary partitions. When I installed FreeBSD 6.1, sysinstall gave me the option of installing on three different disks. The "ad0", "ad1" and "ar0". The last is the RAID-1 volume that FreeBSD recognises by default. I chose "ar0" and proceeded to install into the second partition of the volume. All well so far. I chose to install Gnome 2.16 from Tinderbox which brought HAL along the way. When I booted the Gnome desktop, I saw a sum of six partitions, thanks to HAL not separating/hiding the drives that the RAID-1 volume consists of (a known issue). Maybe this is what you see? I also wonder, since I have never had a true PCI RAID controller together with FreeBSD, if every RAID volume behaves like this. I am familiar with the term "soft-raid controller" and clarifying, it means that it is half implemented as hardware, and half as software (something like win-modems). That's why FreeBSD sees the detailed "interior" of the array - the driver can control the whole RAID process, add/remove member disks and so on. I could be wrong about this, gotta get some hardware to test. Thanasis Rizoulis Electronic Computing Systems Engineer Greece
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