Date: Sun, 30 Mar 2003 22:09:50 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Nate Lawson <nate@root.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sbin/fdisk fdisk.c Message-ID: <17378.1049054990@critter.freebsd.dk> In-Reply-To: Your message of "Sun, 30 Mar 2003 12:05:05 -0800." <Pine.BSF.4.21.0303301153000.5939-100000@root.org>
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In message <Pine.BSF.4.21.0303301153000.5939-100000@root.org>, Nate Lawson writ es: >On Sat, 29 Mar 2003, Poul-Henning Kamp wrote: >> In message <Pine.BSF.4.21.0303291408451.4536-100000@root.org>, Nate Lawson writ >> es: >> >On Sat, 29 Mar 2003, Poul-Henning Kamp wrote: >> >> Modified files: >> >> sbin/fdisk fdisk.c >> >> Log: >> >> Use default geometry in case the device doesn't provide one: >> >> 512 for sectorsize. >> >> 63 for sectors. >> >> 255 for heads. >> >> This will mostly show up on MD(4) devices. >> > >> >Won't this be a problem for small devices or for int 13 booting? That's >> >why we use 64 heads, 32 sectors for scsi devices < 1 GB. >> >> You can specify any number you like to fdisk using all the usual >> ways of doing so, and you should if you want to copy the image to >> some other media afterwards. > >Sure. My concern was for devices like USB flash disks where your defaults >may not be appropriate and the info IS being written to media. Would you >be willing to put in a < 1GB size check on the media to use more >appropriate heads/sector values? USB flash disks will report with DIOCGFWSECTORS/FWHEADS and therefore not hit this code. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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