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Subject: Re: cvs commit: src/sys/i386/isa wd.c wdreg.h
In-Reply-To: <199804090443.BAA23976@gaia.coppe.ufrj.br> from Joao Carlos Mendes Luis at "Apr 9, 98 01:43:15 am"
To: jonny@coppe.ufrj.br (Joao Carlos Mendes Luis)
Date: Thu, 9 Apr 1998 10:18:46 +0200 (MEST)
Cc: sos@FreeBSD.ORG, cvs-sys@FreeBSD.ORG
From: Søren Schmidt <sos@FreeBSD.ORG>
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In reply to Joao Carlos Mendes Luis who wrote:
> #define quoting(Søren Schmidt)
> // sos         1998/04/08 13:04:40 PDT
> // 
> //   Modified files:
> //     sys/i386/isa         wd.c wdreg.h 
> //   Log:
> //   Add LBA mode support for large drives.
> //   Use config flags 0x1000 to enable LBA mode. It should be enabled in
> //   the BIOS too to avoid geometry confusion.
> //   
> //   One catch though, I'm not sure all BIOS's uses the 64head/63secs
> //   translation, all mine does but....
> 
> You don't have any disk bigger than 2G, am I right ?  My ASUS motherboard
> and most I have seen until now choose the translation based on disk size.  
> Disk up to 2G -> 64/63.  Between 2G and 4G -> 128/63, 4G and 8G -> 255/63.
> I've never seen a disk bigger than 8G, so I don't know how they would 
> behave.

Well, I do have 4.3G disks and they still get 64/63, but as I said....

> The best option would be to ask BIOS for this info.  How is the VM86 mode
> support going in -current ?  :)

Exactly, but this is mostly a stopgap solution to those with big drives
in dedicated mode...,

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Søren Schmidt               (sos@FreeBSD.org)               FreeBSD Core Team
                Even more code to hack -- will it ever end
..