Date: Thu, 14 Oct 2004 02:03:21 -0600 From: freebsd@dreamchaser.org To: Subhro <subhro.kar@gmail.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Disk geometry, 5.3b7 install Message-ID: <416E32C9.2030905@dreamchaser.org> In-Reply-To: <b2807d0404101400155a1d91dc@mail.gmail.com> References: <416E2142.8090909@dreamchaser.org> <b2807d0404101400155a1d91dc@mail.gmail.com>
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Subhro wrote:
>>When I boot off a CD (image created from downloaded iso image),
>>start the install, and go to allocate the freebsd slice, it reports
>> 155061/16/63 ad4
>>and says the geometry is invalid
>
> What does the sticker on top of the drive say about its geometry. I
> would like to explicitly instruct fdisk to use the Geometry on the
> sticker but only if fdisk or anyone else complains during the install.
There is nothing about geometry on the drive itself.
The official specs from Seagate say it reports a default logical
geometry of 16383/16/63, but that only covers 8G...
There is no other mention of geometry in the specs;
it simply says that using LBA the sectors are addressed 0...n-1
>>If I go ahead and attempt to partition, I see
>>Geometry ad4 9729 cylinders/255 heads/63 sectors = 156296385 sectors
>> (76316MB)
>> Offset Size(St) End Name PType Desc SubType Flags
>> 0 63 62 -- 12 unused 0
>> 63 16386237 16386299 ad4s1 4 NTFS/HPFS/QNX 7
>>16386300 139915188 156301487 -- 12 unused 0
>>
>
>
> This one is fine. Whats the problem? You can just make up the slice
> from the unsed free space starting from offset 16386300.
The only problem is that the geometry was reported as bad by
sysinstall, and implied I needed to change it.
Yet the partition step appears to have changed it already, or is
assuming it will be changed.
I don't understand what the situation is:
sysinstall reported geometry as 155061/16/63 and said it was bad
then partitioning assumes it will be 9729/255/63
Do I actually have to run pfdisk to change it from 155061/16/63 to
9729/255/63?
One more question:
The installation notes say the root partition must be below cylinder
1024. If I want a largish (8G) partition for windows, how do I
accomplish this? Do I have to make 4 partitions, a small one for
booting windows, a small one for freebsd's root, and then a larger
one for the rest of windows and another larger one for the rest of
freebsd?
e.g.
cyl partition use
1- 511 1 windows boot
512-1023 2 freebsd /
1024-1500 3 windows additional stuff
1501-9729 4 freebsd filesystems other than /
Thanks,
Gary
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