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Hermes SMTP Server) with ESMTPA ID a76923fce8e5934e519a47d390acfcb2; Sat, 23 Sep 2023 19:21:37 +0000 (UTC) From: Mark Millard Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable List-Id: Production branch of FreeBSD source code List-Archive: https://lists.freebsd.org/archives/freebsd-stable List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.700.6\)) Subject: RE: nvd->nda switch and blocksize changes for ZFS Message-Id: Date: Sat, 23 Sep 2023 12:21:27 -0700 To: frank@harz2023.behrens.de, FreeBSD-STABLE Mailing List X-Mailer: Apple Mail (2.3731.700.6) References: X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.49 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.99)[-0.990]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; MV_CASE(0.50)[]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; MIME_GOOD(-0.10)[text/plain]; FROM_HAS_DN(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; ARC_NA(0.00)[]; MLMMJ_DEST(0.00)[freebsd-stable@freebsd.org]; RCVD_IN_DNSWL_NONE(0.00)[98.137.65.147:from]; DWL_DNSWL_NONE(0.00)[yahoo.com:dkim]; ASN(0.00)[asn:36647, ipnet:98.137.64.0/20, country:US]; RWL_MAILSPIKE_POSSIBLE(0.00)[98.137.65.147:from]; DKIM_TRACE(0.00)[yahoo.com:+]; FREEMAIL_FROM(0.00)[yahoo.com]; TO_DN_SOME(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; RCVD_TLS_LAST(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2] X-Rspamd-Queue-Id: 4RtJsd21VGz3DbX Frank Behrens wrote on Date: Sat, 23 Sep 2023 16:31:40 UTC : > I created a zpool with a FreeBSD-14.0-CURRENT on February. With=20 > 15.0-CURRENT/14.0-STABLE from now I get the message: >=20 > status: One or more devices are configured to use a non-native block = size. > Expect reduced performance. > action: Replace affected devices with devices that support the > configured block size, or migrate data to a properly = configured > pool. > NAME STATE READ WRITE CKSUM > zsys ONLINE 0 0 0 > raidz1-0 ONLINE 0 0 0 > nda0p4 ONLINE 0 0 0 block size: 4096B=20 > configured, 16384B native > nda1p4 ONLINE 0 0 0 block size: 4096B=20 > configured, 16384B native > nda2p4 ONLINE 0 0 0 block size: 4096B=20 > configured, 16384B native >=20 > I use: > nda0: > nda0: nvme version 1.4 > nda0: 953869MB (1953525168 512 byte sectors) >=20 > I cannot imagine, that the native blocksize changed. Do I really = expect=20 > a reduced performance? > Is it advisable to switch back to nvd? Looking at: https://www.techpowerup.com/ssd-specs/samsung-980-1-tb.d58 it reports (indifferent places on the page): QUOTE Page Size: 16 KB Notes NAND Die: A Dual-plane Die with 2 sub-planes with 8 KiB pages in order to improve = performance through paralellism. Endurance: Could be from 1.500 to 3.000 P.E.C. depending on NAND binning END QUOTE That "A Dual-plane Die with 2 sub-planes with 8 KiB pages", for a total of 16 KB, does suggest to me that the new messages have a chance of being correct about there being a tradeoff. (But I'm no expert in the area.) =3D=3D=3D Mark Millard marklmi at yahoo.com