Date: Tue, 12 Jan 2021 19:35:01 +0100 From: Kurt Jaeger <pi@freebsd.org> To: joe mcguckin <joe@via.net> Cc: freebsd-current@freebsd.org Subject: Re: Preparing ZFS drives Message-ID: <X/3r1SssReAPWRUF@home.opsec.eu> In-Reply-To: <CF6CB87D-D1A4-4328-976D-31764C0BD1F2@via.net> References: <CF6CB87D-D1A4-4328-976D-31764C0BD1F2@via.net>
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Hi! > How should I label and prepare the drives for ZFS? Someone ought to write a ???cookbook??? on that! Basically, what I once did, was this: zpool create bck raidz2 ada2 ada3 ada4 ada5 ada6 ada7 ada8 ada9 Therefore: raw disks, nothing else. > Do I need to start the volume on a particular sector boundary? > > Are the 4096 byte sector drives usable? I think the default is now 4096 anyway. https://charsiurice.wordpress.com/2016/05/30/checking-ashift-on-existing-pools/ describes the command to check for 4096 blocks: zdb -C | grep ashift If it displays ashift: 9 the blocks are 512 bytes. If it displays ashift: 12 the block size is 4096. -- pi@opsec.eu +49 171 3101372 Now what ?
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