cvs commit: src/sbin/fdisk fdisk.c
phk at phk.freebsd.dk
Sun Mar 30 12:09:58 PST 2003
In message <Pine.BSF.4.21.0303301153000.5939-100000 at root.org>, Nate Lawson writ
>On Sat, 29 Mar 2003, Poul-Henning Kamp wrote:
>> In message <Pine.BSF.4.21.0303291408451.4536-100000 at root.org>, Nate Lawson writ
>> >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 at 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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