Date: Wed, 26 Jan 2011 21:47:15 +0100 From: Christer Solskogen <christer.solskogen@gmail.com> To: Dan Nelson <dnelson@allantgroup.com> Cc: "O. Hartmann" <ohartman@mail.zedat.fu-berlin.de>, freebsd-questions@freebsd.org Subject: Re: FreeBSD 9/ZFS: Striped Pool (2 disks) migrating to mirror (onto additional disk) Message-ID: <AANLkTimJwT6pShtC2c-O2=a=78LBB8%2Bm=WoFQXTkOqk9@mail.gmail.com> In-Reply-To: <20110126204233.GN75125@dan.emsphone.com> References: <4D3FDE82.4000105@mail.zedat.fu-berlin.de> <AANLkTi=udjU-MKEU%2BAHU2DyyLL3sMVcKbT3WsLGW7YTN@mail.gmail.com> <20110126195800.GM75125@dan.emsphone.com> <AANLkTimgbVvsFjc-FSdSoKe3cC6uNYNavvL1-WaCRSn4@mail.gmail.com> <20110126204233.GN75125@dan.emsphone.com>
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On Wed, Jan 26, 2011 at 9:42 PM, Dan Nelson <dnelson@allantgroup.com> wrote= : > ZFS lets you add and detach mirrors on the fly, since you're not changing > the capacity of the pool itself. =A0Sure, you're going to lose the conten= ts of > the large 2TB drive, but that's sort of assumed. =A0You can't convert 4TB= of > non-mirrored disks into 2TB of mirrored disks without losing 2TB of space= . > Just make sure you have less than 2TB total used data on all volumes, and > copy the data off the 2TB filessytem onto the striped 1+1TB one before > repartitioning and adding the mirrors. > > =A0zpool attach [-f] pool device new_device > The problem is that you cant attach a drive to a vdev that consists of two striped disks. --=20 chs,
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