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Date:      Thu, 24 Feb 2000 05:43:04 +1100 (EST)
From:      Bruce Evans <bde@zeta.org.au>
To:        Andreas Klemm <andreas@klemm.gtn.com>
Cc:        current@FreeBSD.ORG
Subject:   Re: disklabels partition sizes differ from FreeBSDs syslog messages on mounting
Message-ID:  <Pine.BSF.4.21.0002240534280.6132-100000@alphplex.bde.org>
In-Reply-To: <20000223152130.A1583@titan.klemm.gtn.com>

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On Wed, 23 Feb 2000, Andreas Klemm wrote:

> On Wed, Feb 23, 2000 at 11:43:32PM +1100, Bruce Evans wrote:
> > Old systems don't support 40GB disks (except in LBA mode, which is
> > broken in other ways).

> what do you mean exactly with "old systems" ?

FreeBSD-3.x, or FreeBSD--current with the wd driver.

> Please look here:
> FreeBSD is able to detect the drive in it's full size, kernel message:
> ad4: 39082MB <Maxtor 54098U8> [79406/16/63] at ata2-master using UDMA33
> 79406*16*63= 80041248 sectors

Old systems only support 65536 cylinders.  (All FreeBSD drivers only support
65556 sectors in CHS mode.)

> Disklabel also has reasonable entries:
> 	sectors/track: 63
> 	tracks/cylinder: 255
> 	cylinders: 4217
> 	sectors/unit: 67746105
> 	255*63*4217= 67746105
> 	which should be the size of my FreeBSD slice

This is reasonable if the slice isn't [nearly] the whole disk.

Bruce



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