Date: Wed, 19 Oct 2011 13:36:11 -0200 From: Sergio de Almeida Lenzi <lenzi.sergio@gmail.com> To: Jorge Medina <jorge@bsdchile.cl> Cc: Albert Shih <Albert.Shih@obspm.fr>, zfs-discuss@opensolaris.org, freebsd-questions@freebsd.org Subject: Re: ZFS on Dell with FreeBSD Message-ID: <1319038571.43689.13.camel@z6000.lenzicasa> In-Reply-To: <CAG-7A%2BDPDa3ru5NpM4uzrbC-fAvJQs5r21KB_z0nKg9mKUGX1g@mail.gmail.com> References: <20111019141443.GQ4592@pcjas.obspm.fr> <CAG-7A%2BDPDa3ru5NpM4uzrbC-fAvJQs5r21KB_z0nKg9mKUGX1g@mail.gmail.com>
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I have several dells with the perc controller and I can say that the best solution is to user raid 0 (see both disks) and let zfs to mirror them.. This works ok, and you can use the zfs tools to manage the disks. Howerver this does not solve the problem that I had with the perc controller.. The problem is that all the storage you have is in the perc controller, even it is reliable, when it "breaks", all of your storage (and so the computer...) is useless. You cannot move the drives (HD) to another machine because the "normal" controller (ad, ada) will not recognize the disk. Even if you have a spare perc controller of the same kind at hand (and I bet you do not have...) the disks are "signed" by the other (the broken) controller and so will not be recognized by the new controller. In my case I had to call dell support, and only after several hours I could put the HD online again. I mount only one disk (of the zfs pool) in the new controller, and even with the dell support in the phone the new controller wipe out the disk. A new call (with a different dell support) was able to re-initialize the disk, that includes re-install Freebsd... and after that "attach" the old disk, and using zpool detatch, followed by zpool attach (the old disk), it than reconstruct the mirror... resulting in almost 6 hour downtime and a loss of one day working for the hole company. Now, a dell support (here) does not attend you if you say that the OS is FreeBSD, you must say to them that you are installing Linux... to get the support. Conclusion: now I prefer the IBM 32XX series... Ok that is my story Sergio.
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