Date: Thu, 27 May 2021 11:32:27 -0700 From: joe mcguckin <joe@via.net> To: freebsd-fs <freebsd-fs@freebsd.org> Subject: Upsizing a ZFS filesystem - shift question Message-ID: <BF3CEC2C-2DEB-424A-97B8-2D35FDEEFD18@via.net>
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--Apple-Mail=_0FB6D16F-282F-4582-ADC9-C61ADD1C1ACF Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 I have an existing 32TB filesystem (2 X 8T vdevs). I want to upgrade = each of the drives to 16TB. I pulled one drive and tried a =E2=80=98zfs = replace=E2=80=99 comand, but zfs replied with some message about new = drive optimal ashift doesn=E2=80=99t match the vdev. It suggested Retrying = the =E2=80=98replace=E2=80=99 command with =E2=80=98zfs replace -o = ashift=3DN=E2=80=99 Ok, a little investigation shows the existing filesystem has an ashift = of 9. These are older 2T drives with 512 byte sectors. The newer drives = are 4kn sectors. Is ashift settable on a drive by drive basis? Can I temporarily set = ashift on a drive until all the drives in a vdev have been replaced? = Once all drives have been replaced, how do I set ashift=3D12 for all the = drives in the vdev? After replacing all the drives, will the additional space magicially = appear or is there an additional command or series of steps? Thanks, Joe Joe McGuckin ViaNet Communications joe@via.net 650-207-0372 cell 650-213-1302 office 650-969-2124 fax --Apple-Mail=_0FB6D16F-282F-4582-ADC9-C61ADD1C1ACF--
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