Date: Fri, 1 Feb 2002 10:57:38 +0600 (NOVT) From: "Maxim M. Kazachek" <stranger@sberbank.sibnet.ru> To: FreeBSD Stable <fbsdstable@cobble.capnet.state.tx.us> Cc: David Burren <david@burren.cx>, <freebsd-stable@FreeBSD.ORG> Subject: Re: Setting drive geometry, big drives? Message-ID: <20020201105521.S8716-100000@sbk-gw.sibnet.ru> In-Reply-To: <20020131222442.I96906-100000@cobble.capnet.state.tx.us>
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On Thu, 31 Jan 2002, FreeBSD Stable wrote:
>
>
>On Fri, 1 Feb 2002, David Burren wrote:
>
>> > So the partition editor picks another default, which is
>> > 7476/255/63. Which seems to work fine, but now I have three
>> > different numbers. The boot still shows 119150/16/63, the BIOS
>> > still shows 29437/16/255, and the disklabel shows 7476/255/63.
>
>> > Questions: Why the warning about not using the PHYSICAL GEOMETRY,
>> > especially since the BIOS reports an apparently-proper physical
>> > geometry, and I'm told I must use the BIOS settings for the
>> > drive's geometry? And why is the boot message still reporting
>> > 119150/16/63, when that isn't set anywhere???
>
>> Surely the driver will be probing the device directly to find the
>> 119150/16/63 geometry. Have you tried setting the BIOS to use the
>> same geometry and see where that gets you?
>
>The partition editor insists that 119150/16/63 is not a proper
>geometry for the drive, so there isn't much point to setting
>it that way in the BIOS, but I can't, anyway. The BIOS (both
>on a 1rst MB and a Tyan K7) cannot be set to a six-digit number
>for the cylinders.
>
>So, why does the partition editor think the 119150/16/63
>numbers would be a bad selection??? It is what it is
>getting when it asks the drive, apparently. Why should
>I _not_ use the numbers in the probe, and why not use
>the BIOS reported numbers?
>
I'm afraid that 119150 can't fit into 16 bit integer that contains
cylinder count in the partition table entry.
Sincerely, Maxim M. Kazachek
mailto:stranger@sberbank.sibnet.ru
mailto:stranger@fpm.ami.nstu.ru
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