Date: Sun, 12 Jun 2016 15:14:12 -0700 From: Yuri <yuri@rawbw.com> To: "Brandon J. Wandersee" <brandon.wandersee@gmail.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: ZFS: Is 'zpool add' really irreversible? Message-ID: <22e9b8aa-3171-f399-f3a8-b71eb92210f5@rawbw.com> In-Reply-To: <86shwiax38.fsf@WorkBox.Home> References: <d13abf72-3903-796a-1d47-e3a7b776ebf8@rawbw.com> <86shwiax38.fsf@WorkBox.Home>
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On 06/12/2016 14:58, Brandon J. Wandersee wrote: > `zpool add` adds*virtual* devices to a*pool*, while `zfs attach` adds > physical devices to a mirrored device. So individual disks can be added > to and removed from mirrored virtual devices, but virtual devices cannot > be removed from a pool. Thank you for your answer. I see that ZFS is designed this way. But I can't say I like this part of ZFS design. Because this isn't a physical disk with the set size, but a combination of disks. People may reasonably want to remove some disks in some layouts, due to failures, etc, and ZFS just lacks the flexibility to do that. Thanks! Yuri
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