Date: Sun, 17 Apr 2011 20:31:35 +0400 From: Lystopad Olexandr <laa@laa.zp.ua> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org, Lystopad Olexandr <laa@laa.zp.ua> Subject: Re: ZFS root on MB Intel S3420GP Message-ID: <20110417163135.GC96423@laa.zp.ua> In-Reply-To: <20110417142135.GA51568@icarus.home.lan> References: <20110417123232.GA96423@laa.zp.ua> <20110417142135.GA51568@icarus.home.lan>
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Hello, Jeremy Chadwick! On Sun, Apr 17, 2011 at 07:21:35AM -0700 freebsd@jdc.parodius.com wrote about "Re: ZFS root on MB Intel S3420GP": > On Sun, Apr 17, 2011 at 04:32:32PM +0400, Lystopad Olexandr wrote: > > I have this hardware: > > > > smbios.system.maker="Intel Corporation" > > smbios.system.product="S3420GP" > > > > with 4G ram and 4x WD 500G drives. > > > > I try both raids in the bios, in both cases i try raid 10. > > I.e. I have 1Tb ar0 device. > > I strongly urge you to remove use of Intel RST[1]. It's been confirmed > many times over[2] that FreeBSD's support for it is broken in many > regards. You are putting your data at extreme/great risk using it. > Something as simple as a single-disk failure could result in the > *entire* loss of your array. You will need to read the PRs listed at > Wikipedia slowly, and in full to understand the nature of the problem. > Do not skim them. > > I cannot stress the importance of this enough. This is not a joke nor > is it overblown. I recommend you rely on ZFS entirely, and run your > SATA controller in AHCI mode instead. My personal recommendation would > be to use UFS for your root filesystem (or even gmirror) and use ZFS for > the rest. Jeremy, thank you very much! I remove intel raids and move to ahci already. I install freebsd 8.2-amd64 on that box and about to make gmirror with 4 disks. :-) Is it possible to remote migrate to zfs? I have access to this server remotely, and do not have local access. This server with 4 disks, and I can do anything with 3 of disks. Now there installed 8.2-amd64 on ad4. > With regards to AHCI mode: Most of us strongly advocate use of ahci.ko > (not ataahci.ko; they differ), which does SATA<->CAM translation. You > also gain NCQ capability using this. Be aware your disks will appear as > "adaX" (not a typo), and you will use "camcontrol" (rather than > "atacontrol") to maintain them. Utilities like smartmontools do work > with this. Many of us (users and developers) have been using ahci.ko > reliably for 1-2 years now. Simply add ahci_load="YES" in loader.conf? Or something else? > > After reading http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/RAIDZ1 I > > try to install FreeBSD on this box, but I change ad0..ad1.. to my > > ar0 device. I try to have zfs on intel raid10. > > > > All commands run successfully, but after reboot I have: > > > > gptzfsboot no zfs pools located: can't boot > > > > What mistake I made? > > > > What best solution with my hardware exist? > > I imagine what you're trying to accomplish won't work given that the > disk geometry and other mechanics are completely lost given use of > Intel RST, and *especially* with regards to the boot sequence. > > Furthermore, the bootstraps you're using imply use of GPT; did you > configure your setup using GPT? I'm guessing not. I make all steps in url in first my mail. Am I wrong? > [1]: Known as "Intel Rapid Storage Technology", "Intel MatrixRAID", > "Intel HostRAID", "Intel Embedded Server RAID Technology", "Intel Matrix > Storage RAID Technology", and many other terms. Intel keeps changing > the term/labelling of this BIOS-level RAID, almost certainly for > marketing purposes. :-((( I dont know... > [2]: http://en.wikipedia.org/wiki/Intel_Rapid_Storage_Technology > Note that FreeBSD PRs are provided in the article. -- Lystopad Olexandr
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