Date: Wed, 17 Aug 2016 10:07:16 -0600 From: Warner Losh <imp@bsdimp.com> To: =?UTF-8?Q?Dag=2DErling_Sm=C3=B8rgrav?= <des@des.no> Cc: Nathan Whitehorn <nwhitehorn@freebsd.org>, src-committers <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org> Subject: Re: svn commit: r304142 - head/usr.sbin/bsdinstall/partedit Message-ID: <CANCZdfq0qHKAkv8MO5UYB3ye6XHoFEFYe-BCJT=W7yfTVR_cJA@mail.gmail.com> In-Reply-To: <CANCZdfoU-UeO=64xVpmLa=q_6LXS42smBzP1taU6WFt=o_LvYQ@mail.gmail.com> References: <201608150930.u7F9UL1V069576@repo.freebsd.org> <e3454e8e-5d98-5bec-21de-8ea0db2b9b08@freebsd.org> <861t1n6749.fsf@desk.des.no> <581c856c-826b-529e-c9c6-a397fb679708@freebsd.org> <86wpjf4eun.fsf@desk.des.no> <8cb3fa1a-50cb-e238-d006-b98a628d446d@freebsd.org> <86k2ff4cxs.fsf@desk.des.no> <CANCZdfoU-UeO=64xVpmLa=q_6LXS42smBzP1taU6WFt=o_LvYQ@mail.gmail.com>
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On Wed, Aug 17, 2016 at 10:04 AM, Warner Losh <imp@bsdimp.com> wrote: > On Wed, Aug 17, 2016 at 9:45 AM, Dag-Erling Sm=C3=B8rgrav <des@des.no> wr= ote: >> Nathan Whitehorn <nwhitehorn@freebsd.org> writes: >>> Dag-Erling Sm=C3=B8rgrav <des@des.no> writes: >>> > I have mentioned several examples to you, and even told you how to >>> > confirm, by inspecting the source code, that most drivers do *not* >>> > set the stripe size. >>> Most drivers? Yes, sure. Most drivers that people use? No. >> >> Every. Single. Dell. Server. >> >> Probably every single HP server as well, I haven't checked. >> >> VirtualBox gets it wrong. Xen gets it wrong. I believe KVM (including >> RHEV) and VMWare get it wrong too, but haven't been able to verify. >> >> I guess those aren't important to you? > > Also, SD cards get it wrong. It is reported, true enough, but it is often > wrong in the sense it can be suboptimal. Different SD cards report > different things for the number of sectors to erase at a time. Some > vendors do an excellent job of reporting the optimal amount. Others > do not (often because [stupid gmail] often because they copy from last year's design. I've had to override the reported size numerous times to get decent performance from SD cards in the past. Almost all of the recent embedded boards that FreeBSD supports use SD cards. While we provide images to just boot off of, there are several designs that have both a SD card and an embedded eMMC or similar card that we should be able to run the installer on. Warner
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