Date: Mon, 02 Jun 2014 16:01:25 +0400 From: "Andrey V. Elsukov" <ae@FreeBSD.org> To: Warren Block <wblock@wonkity.com>, Ian Lepore <ian@FreeBSD.org> Cc: John-Mark Gurney <jmg@funkthat.com>, hackers@FreeBSD.org, "Michael W. Lucas" <mwlucas@michaelwlucas.com>, Marcel Moolenaar <marcel@FreeBSD.org> Subject: Re: fdisk(8) vs gpart(8), and gnop Message-ID: <538C6795.9080005@FreeBSD.org> In-Reply-To: <alpine.BSF.2.00.1406010833290.24305@wonkity.com> References: <20140601004242.GA97224@bewilderbeast.blackhelicopters.org> <20140601020053.GR43976@funkthat.com> <1401632369.20883.51.camel@revolution.hippie.lan> <alpine.BSF.2.00.1406010833290.24305@wonkity.com>
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[-- Attachment #1 --] On 01.06.2014 18:36, Warren Block wrote: > Thread starts here: > http://lists.freebsd.org/pipermail/freebsd-geom/2014-February/005835.html > >> For the longest time geom would warn about "geometry does not match >> label" that had something to do with different parts of the code >> calculating different CHS values. Eventually it was decided to remove >> the unactionable message, and my vague memory is that the justification >> was basically "because CHS is meaningless to geom and modern BIOSen." >> >> If there's some "it would cause problems on this ancient hardware that >> only 3 people in the world use" (I'm usually one of those people -- we >> support some old equipment in the field at $work), then maybe there >> could be a flag that enables the old CHS alignment behavior. > > Short form of above: gpart is supposed to hide and handle underlying > GEOM issues, so it needs an override to be able to create these > "non-standard" MBRs with slices aligned to arbitrary values. Hello, I propose add a sysctl variable kern.geom.part.mbr.enforce_chs which is set by default. Merge it to all branches, then change it to zero in head/. User could change it when he wants to use alignment to 4k. And if there is no objections against this, I can do it. -- WBR, Andrey V. Elsukov [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (FreeBSD) iQEcBAEBAgAGBQJTjGebAAoJEAHF6gQQyKF6gCsH/i3XRwflxMgfE+wbN0wtQdQ/ lZoFQDvNVpkGn5pkCSeqTtSrHpWyT5AoAza6G1mQmEkPhlVy4lFd3Umhs4eceJf3 uaSPjFeFfCU6enJghG3s18xheejFCY36kNZNgK5XLlXcYXL1fCnOhh0NQab+7/rT DgZjegWGNdvi43xaskV2S8Qc1GxuYobHPW+wy8I2USfRsAWMhfXW9Pu4OT9HXavy kibWKtqTJ7kxhovk3KdfOUsErvOFElcIk1w2Fvb7Mk7kV/eBB11LEXeN+4ELtlHW dxsFQoEhaE8DfaMk/kZH+3L1Zpd+YaHJKTbDulebPOC5gK8Wp/RZthp2lf9yFxo= =YQ0W -----END PGP SIGNATURE-----help
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