Re: misleading ZFS warning
Ronald Klop <[email protected]> Thu, 23 Jul 2026 08:42:38 +0200 (CEST)
| Newsgroups | gmane.os.freebsd.devel.file-systems |
|---|---|
| Message-ID | <1087535779.8809.1784788958495@localhost> |
------=_Part_8808_673920129.1784788958492 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit For a single disk pool I think you can ignore the warning. I can only imagine the situation of the warning for a raidz setup. Maybe others have more insights. Regards,Ronald Van: Anthony Pankov <[email protected]> Datum: 22 juli 2026 17:26 Aan: Ronald Klop <[email protected]> CC: [email protected] Onderwerp: Re: misleading ZFS warning > > > > > What is underlying pool structure? > > pool: as1 > state: ONLINE > config: > > NAME STATE READ WRITE CKSUM > as1 ONLINE 0 0 0 > diskid/DISK-WD-C82MNNSK.eli ONLINE 0 0 0 > > one dedicated GELI-encrtypted HDD. > > GELI info: > > Geom name: diskid/DISK-WD-C82MNNSK.eli > State: ACTIVE > EncryptionAlgorithm: AES-XTS > KeyLength: 128 > Crypto: accelerated software > Version: 7 > UsedKey: 0 > Flags: NONE > KeysAllocated: 1398 > KeysTotal: 1398 > Providers: > 1. Name: diskid/DISK-WD-C82MNNSK.eli > Mediasize: 6001175121920 (5.5T) > Sectorsize: 4096 > Mode: r1w1e1 > > > > Wednesday, July 22, 2026, 6:12:00 PM, you wrote: > > > What is underlying pool structure? > > Zraid/mirror/single disk? > > > If zraid, what is the stripesize? > > > Regards, > > Ronald > > > Van: Anthony Pankov > > Datum: 22 juli 2026 11:51 > > Aan: [email protected] > > Onderwerp: misleading ZFS warning > > >> > > Hello, > >> > Doing this: > >> > zfs create -b 4096 -o volmode=dev -V 32G as1/dockerim/dsk.adocker > >> > I've got > >> > Warning: volblocksize (4096) is less than the default minimum block size (16384). > >> To reduce wasted space a volblocksize of 16384 is recommended. > >> > While ashift=12 for this pool I can't understand am I really do something wrong and there will be "wasted space" or this is a misleading warning. > >> > Can somebody enlight this? > >> > -- > Best regards, > >> Anthony Pankov mailto:[email protected] > > > > -- > Best regards, > Anthony > > > > > ------=_Part_8808_673920129.1784788958492 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit <html><head></head><body>For a single disk pool I think you can ignore the warning. I can only imagine the situation of the warning for a raidz setup. <br class="rw_extra"><br>Maybe others have more insights.<br class="rw_extra"><br>Regards,<br class="rw_extra">Ronald<br class="rw_extra"><br><p><small><strong>Van:</strong> Anthony Pankov <[email protected]><br><strong>Datum:</strong> 22 juli 2026 17:26<br><strong>Aan:</strong> Ronald Klop <[email protected]><br><strong>CC:</strong> [email protected]<br><strong>Onderwerp:</strong> Re: misleading ZFS warning<br></small></p><blockquote style="margin-left: 5px; border-left: 3px solid #ccc; margin-right: 0px; padding-left: 5px;"><div class="MessageRFC822Viewer" id="P"><!-- P --> <!-- processMimeMessage --><div class="TextPlainViewer" id="P.P"><!-- P.P --><br> > What is underlying pool structure?<br> <br> pool: as1<br> state: ONLINE<br> config:<br> <br> NAME STATE READ WRITE CKSUM<br> as1 ONLINE 0 0 0<br> diskid/DISK-WD-C82MNNSK.eli ONLINE 0 0 0<br> <br> one dedicated GELI-encrtypted HDD.<br> <br> GELI info:<br> <br> Geom name: diskid/DISK-WD-C82MNNSK.eli<br> State: ACTIVE<br> EncryptionAlgorithm: AES-XTS<br> KeyLength: 128<br> Crypto: accelerated software<br> Version: 7<br> UsedKey: 0<br> Flags: NONE<br> KeysAllocated: 1398<br> KeysTotal: 1398<br> Providers:<br> 1. Name: diskid/DISK-WD-C82MNNSK.eli<br> Mediasize: 6001175121920 (5.5T)<br> Sectorsize: 4096<br> Mode: r1w1e1<br> <br> <br> <br> Wednesday, July 22, 2026, 6:12:00 PM, you wrote:<br> <br> > What is underlying pool structure?<br> > Zraid/mirror/single disk?<br> <br> > If zraid, what is the stripesize?<br> <br> > Regards,<br> > Ronald<br> <br> > Van: Anthony Pankov <[email protected]><br> > Datum: 22 juli 2026 11:51<br> > Aan: [email protected]<br> > Onderwerp: misleading ZFS warning<br> <br> >> > > Hello,<br> >> > Doing this:<br> >> > zfs create -b 4096 -o volmode=dev -V 32G as1/dockerim/dsk.adocker<br> >> > I've got<br> >> > Warning: volblocksize (4096) is less than the default minimum block size (16384).<br> >> To reduce wasted space a volblocksize of 16384 is recommended.<br> >> > While ashift=12 for this pool I can't understand am I really do something wrong and there will be "wasted space" or this is a misleading warning.<br> >> > Can somebody enlight this?<br> >> > -- > Best regards,<br> >> Anthony Pankov mailto:[email protected]<br> <br> <br> <br> -- <br> Best regards,<br> Anthony<br> <br> </[email protected]></div><!-- TextPlainViewer --> <hr> </div><!-- MessageRFC822Viewer --> </blockquote><br><br><br></body></html> ------=_Part_8808_673920129.1784788958492--