Date: Mon, 21 Nov 2011 21:01:52 -0500 From: APseudoUtopia <apseudoutopia@gmail.com> To: Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Setting up ZFS - Filesystem Properties and Installing on Root Message-ID: <CAKOHg=PdQk61tsFJB-Ch=WmC%2BQEWE3_Eveks=X_n-MkosKz_aA@mail.gmail.com> In-Reply-To: <CAOgwaMu4KR3Dpc4ZUSZbxzpS06oe5Bgv-MvzMA6ELiB49%2BJqCg@mail.gmail.com> References: <CAKOHg=PEqeMPN_2dfQ%2B4msi1j7CMUu=iO%2BpSuezRoa_CELzQtw@mail.gmail.com> <CAOgwaMu4KR3Dpc4ZUSZbxzpS06oe5Bgv-MvzMA6ELiB49%2BJqCg@mail.gmail.com>
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On Sun, Nov 20, 2011 at 11:26 PM, Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> wrote: > > > On Sun, Nov 20, 2011 at 10:34 PM, APseudoUtopia <apseudoutopia@gmail.com> > wrote: >> >> Hello, >> >> I'll be setting up a server with ZFS on 9.0-RELEASE (when it's >> released...). I've never used ZFS before, and although I've been >> reading quite a bit about it, I have some questions. >> >> My plan is to use RAID-Z1 across 4 disks. I'll be using GPT, and I >> would like the root to be ZFS as well. I found a guide: >> http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/RAIDZ1 >> >> In step #4, it has you create boot, swap, and zfs partitions on all 3 >> (which would be 4 in my case) disks. Then, in step #5, you install the >> bootloader into all 3 (4) drives. Why do you need boot and swap >> partitions on EACH disk? It seems to me that you would only need disk >> 1 to have boot, swap, and zfs, and the other 3 disks only have one >> partition (using the entire drive) for zfs's pool. Does it have to do >> with the RAIDZ1 setup? Even then, I don't understand it because it's >> not disk mirroring, it's RAID. The BIOS is set to look on one specific >> disk for the loader, not all of them. It seems I'm not understanding >> something entirely here. > > > > http://en.wikipedia.org/wiki/RAID > http://en.wikipedia.org/wiki/Category:RAID > > > If disk 1 fails , the computer ( BIOS ) will look disk 2 . > If disk 2 fails , the computer ( BIOS ) will look disk 3 . > > > If disk ( n - 1 ) fails , the computer ( BIOS ) will look disk ( n ) . > Ah! That makes sense. Thank you!
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