Date: Tue, 2 Dec 2025 17:32:54 -0700 From: Warner Losh <imp@bsdimp.com> To: freebsd-fs@freebsd.org Subject: Re: zpool setup clarification Message-ID: <CANCZdfrxz-swKF5HN_8cZO1A4qmY_x1a1Su2BxAAOQ7JLo6EtQ@mail.gmail.com> In-Reply-To: <aS8TWJKWqSGeAmo3@int21h> References: <aSxnG-HKDYZ0L3lQ@int21h> <b4b75e5e-071c-446f-8298-25f41a609334@app.fastmail.com> <aS8TWJKWqSGeAmo3@int21h>
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[-- Attachment #1 --] On Tue, Dec 2, 2025 at 9:27 AM void <void@f-m.fm> wrote: > On Tue, Dec 02, 2025 at 03:11:32PM +0000, Dave Cottlehuber wrote: > > > > https://openzfs.github.io/openzfs-docs/Performance%20and%20Tuning/Workload%20Tuning.html#whole-disks-versus-partitions > wasn't so > >clear for me. > > same here > > This one is 512 bytes logical, 4096 bytes physical > It's CMR+HAMR not has one of those before > I always 1MB align partitions, and put the first one with ZFS at a 1MB boundary. Though some really large NVMe drives making this 16MB might not be bad for performance. Warner [-- Attachment #2 --] <div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Dec 2, 2025 at 9:27 AM void <<a href="mailto:void@f-m.fm">void@f-m.fm</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Tue, Dec 02, 2025 at 03:11:32PM +0000, Dave Cottlehuber wrote:<br> <br> ><a href="https://openzfs.github.io/openzfs-docs/Performance%20and%20Tuning/Workload%20Tuning.html#whole-disks-versus-partitions" rel="noreferrer" target="_blank">https://openzfs.github.io/openzfs-docs/Performance%20and%20Tuning/Workload%20Tuning.html#whole-disks-versus-partitions</a>; wasn't so<br> >clear for me.<br> <br> same here<br> <br> This one is 512 bytes logical, 4096 bytes physical<br> It's CMR+HAMR not has one of those before<br></blockquote><div><br></div><div>I always 1MB align partitions, and put the first one with ZFS at a 1MB boundary. Though some really large NVMe drives making this 16MB might not be bad for performance.</div><div><br></div><div>Warner</div></div></div>
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