Date: Wed, 01 Jun 2011 11:26:16 +0300 From: Daniel Kalchev <daniel@digsys.bg> To: freebsd-fs@freebsd.org Subject: Re: ZFS on 4K drives - Expanding zpool and adding spares (gnop method) Message-ID: <4DE5F7A8.6020300@digsys.bg> In-Reply-To: <20110601101924.11334wftbjfrvor0@webmail.leidinger.net> References: <4DE5D7B1.5040902@decayingorbits.com> <20110601101924.11334wftbjfrvor0@webmail.leidinger.net>
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On 01.06.11 11:19, Alexander Leidinger wrote: > > The 4k-sector part results in a pool specific config setting. I would > expect that if you add additional drives (no matter if 4k or not), > that the pool will continue to use 4k sectors. So I would expect that > you do not need gnop to expend an existing pool, but I have not > tested/verified this. > > The ashift property is per-vdev, so you have to use gnop for each new vdev you add to the zpool. You also do not need to create gnop devices for all new drives -- the vdev will use the largest sector size of any member to calculate it's ashift value. For example, creating the pool gnop create -S 4096 disk0 zpool create test mirror disk0.nop disk1 zpool export test gnop destroy disk0.nop zpool import test adding another vdev gnop create -S 4096 disk2 zpool add test mirror disk2.nop disk3 zpool export test gnop destroy disk2.nop zpool import test Daniel
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