From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Etienne Lorrain <etienne_lorrain@yahoo.fr>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, jeff@garzik.org
Subject: Re: [RFC] ATA host-protected area (HPA) device mapper?
Date: Fri, 09 Jun 2006 18:22:14 +0100 [thread overview]
Message-ID: <1149873734.22124.40.camel@localhost.localdomain> (raw)
In-Reply-To: <20060609104759.26001.qmail@web26913.mail.ukl.yahoo.com>
> Gujin is assuming that your hard disk are accessible by the documented ATA ide
> system, and some (or all?) IDE SATA interface have (volumtary?) broken
> implementation: they are not IDE register compatible.
SFF was never a formal standard, and ST-506 was a random vendor
interface copying exercise that caught on. ACPI permits the firmware to
provide ATA taskfiles but afaik not the boot loader unfortunately.
A lot of newer SATA hardware uses a common standard defined interface
called AHCI, and it appears most vendors are migrating in the direction
of using AHCI. If so then we are in the same kind of flux as the VLB
world before SFF and PCI settled the standard interfaces down for a
while.
Don't see how your HPA code protects versus password locking however. If
I hack the OS I write a new boot block which locks the disk then reboot
into it. By the time you go for your floppy its too late.
If thats not the case I'm most interested how you set it up to avoid
this.
Alan
next prev parent reply other threads:[~2006-06-09 17:06 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-09 10:47 [RFC] ATA host-protected area (HPA) device mapper? Etienne Lorrain
2006-06-09 14:48 ` Jeff Garzik
2006-06-09 15:55 ` RE : " Etienne Lorrain
2006-06-09 17:22 ` Alan Cox [this message]
2006-06-09 20:10 ` Etienne Lorrain
2006-06-10 11:56 ` Etienne Lorrain
2006-06-11 15:48 ` Arjan van de Ven
2006-06-13 10:00 ` Etienne Lorrain
-- strict thread matches above, loose matches on Subject: below --
2006-06-09 20:41 Etienne Lorrain
2006-06-08 7:30 [RFC] AHCI Command Completion Coalescing(CCC) proposal zhao, forrest
2006-06-08 15:01 ` Jeff Garzik
2006-06-09 2:27 ` zhao, forrest
2006-06-09 3:11 ` Another project for you... :) Jeff Garzik
2006-06-09 3:43 ` [RFC] ATA host-protected area (HPA) device mapper? Jeff Garzik
2006-06-09 4:51 ` Matthew Frost
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