Date: Fri, 28 Feb 2020 20:54:45 -0800 From: Chris <bsd-lists@BSDforge.com> To: <freebsd-stable@freebsd.org> Subject: Re: Running FreeBSD on M.2 SSD Message-ID: <10e3153ee81dcd7919079cd0bfc16656@udns.ultimatedns.net> In-Reply-To: <CAP4Gn9CPtsrSTia%2BsSyT7yRiSHGfO0qJGPGrqR7sOSth7dsiwg@mail.gmail.com>
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On Fri, 28 Feb 2020 21:44:45 -0300 Mario Olofo mario.olofo@gmail.com said > Hello guys, a little update that let me more confused > > I reinstalled the FreeBSD with 4k pages using the sysctl > vfs.zfs.min_auto_ashift = 12 and no errors after a lot of stress I put on > it. > One thing that I noticed is that with the pool as 4k, the disk fill up very > fast, recompiling the kernel used my 8GB space and didn't even completed. > But now I don't know if the 4k is the correct answer or if this just delays > the problem as the pages are bigger. The TLDR of 4k vs 512 largely has to do with the size of the files going onto your medium. Many files of a smaller size fit better on a 512 boundary. Whereas larger mp3s or archives fair better on a 4k boundary. BTW these are called SECTOR sizes. Not pages. :) 4k blocks typically read faster, than the 512 blocks (sectors). Because more data can be consumed in one read/write. So really, your going to have to decide how best to "tune" your disk to best suite it's intended use. Many small files. Or big files, and storage. HTH --Chris FreeBSD 14.0-FUTURE #0.000 cray256 > > Mario > > Em sex., 28 de fev. de 2020 às 13:18, Mario Olofo <mario.olofo@gmail.com> > escreveu: > > > Yes, tried 4k quirk but not on install because don't know how to, I did a > > clean install then patch and rebuild the kernel, but > > the volume was already configured for 512bytes, I think I would need to > > create manually the volume, but don't remember how to anymore xD > > But I'll search some tutorials and try. From what I saw, the patch > > suggested on bugzilla got merged into the stable branch, so the quirk will > > be > > detected to use 4k in the installer in a near future. > > > > Mario > > > > Em sex., 28 de fev. de 2020 às 12:52, Theron <theron.tarigo@gmail.com> > > escreveu: > > > >> On 2020-02-28 09:14, Mario Olofo wrote: > >> > Thanks! > >> > > >> > The only thing that I didn't checked was the questions of Theron, about > >> > misaligned data. > >> > The layout of the disk is as follows: > >> > > >> > Disco /dev/sdb: 447,1 GiB, 480113590272 bytes, 937721856 setores > >> > Unidades: setor de 1 * 512 = 512 bytes > >> > Tamanho de setor (lógico/físico): 512 bytes / 512 bytes > >> > Tamanho E/S (mínimo/ótimo): 512 bytes / 512 bytes > >> > Tipo de rótulo do disco: gpt > >> > Identificador do disco: D1725E60-D734-4461-90F8-E9EB2376A65A > >> > > >> > Dispositivo Início Fim Setores Tamanho Tipo > >> > /dev/sdb1 2048 1023999 1021952 499M Windows ambiente de > >> > recuperação > >> > /dev/sdb2 1024000 1228799 204800 100M Sistema EFI > >> > /dev/sdb3 1228800 1261567 32768 16M Microsoft reservado > >> > /dev/sdb4 1261568 532482047 531220480 253,3G Microsoft dados básico > >> > /dev/sdb5 532482048 549257215 16775168 8G FreeBSD ZFS > >> > /dev/sdb6 549257216 937719807 388462592 185,2G Linux sistema de > >> arquivos > >> > > >> > The zfsroot was configured automatically by the installer, so I think > >> that > >> > it align the volume automaticaly right? > >> > > >> > Mario > >> > >> Yes, I don't see any potential alignment issue here. I would wonder if > >> this drive is misrepresenting its physical sector size, deceiving ZFS > >> and the SATA driver into making small writes that the drive does not > >> actually support, but it looks like you may have already tried the > >> relevant workaround: > >> > >> On 2020-02-27 23:44, Mario Olofo wrote: > >> > Maybe the problem really is a combination of factors, for the person > >> that > >> > filed a bug on bugzilla the fix was setting the quirks 4k and > >> broken_trim, > >> > but for me the real block size is 512bytes and only setting the flag > >> > broken_trim didn't help... > >> > > >> > Mario > >> Did you try 4k quirk ? > >> > >> Theron > >> > > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
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