Date: Wed, 27 Mar 1996 10:43:47 -0500 From: Jerry Kendall <jerry@border.com> To: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: fdisk and partition info Message-ID: <96Mar27.104433est.18433-2@janus.border.com>
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Hi all.
I have a bit of a puzzle on my hands. As most of you know, I am
writing a utility to 'fdisk/disklabel/newfs' a hard disk. The puzzle
I have run across is not a show stopper, but, more of a 'explain this to
me' sort of thing..
The current layout(due to short sightedness on microsoft's part) of the
partition table in sector 0 only support 1024 cylinders, 64 sectors, and
256 heads. The current layout of my hard disk has 1647 cylinders, 63
sectors and 16 heads. All of it is for FreeBSD. When I do a 'fdisk wd0'
it only reports 24MB.. Now then, can I assume the 24MB amount is due to
the 1024 cylinder limit? Does FreeBSD look at the 'disklabel' or does it
also look at the partition layout? Does FreeBSD, once loaded, need to be
concerned about the partition layout ?? After all is said and done, is it
safe to say the partition table is ONLY used at boot time? If so, this
would explain way FreeBSD does'nt care about the 24MB reported by fdisk.
Some of these questions are simply to confirm things...
--------------------------------------------------------------------------------
Any comments or opinions in this message are my own and may or may not reflect
the comments or opinions of my present or previous employers.
Jerry Kendall Border Network Technologies Inc.
System Software Engineer Tel +1-416-368-7157 ext 303
jerry@border.com Fax +1-416-368-7178
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