Re: [PATCH 2.6.9-rc3-mm2] EDD: use EXTENDED READ command, add CONFIG_EDD_SKIP_MBR
From: Jeff Garzik (jgarzik_at_pobox.com)
Date: 10/07/04
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- In reply to: Matt Domsch: "Re: [PATCH 2.6.9-rc3-mm2] EDD: use EXTENDED READ command, add CONFIG_EDD_SKIP_MBR"
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Date: Thu, 07 Oct 2004 01:32:04 -0400 To: Matt Domsch <Matt_Domsch@dell.com>
Matt Domsch wrote:
> On Thu, Oct 07, 2004 at 12:39:54AM -0400, Jeff Garzik wrote:
>
>>Alas, this does not eliminate the 30-second delay on my box.
>
>
> OK, thanks for trying. So it's not the READ SECTORS call itself
> that's the problem.
>
>
>>Just to re-emphasize, I feel a particularly relevant detail is that my
>>VIA-based Athlon64 box has _all_ PATA ports disabled.
>>
>>I am fairly certainly that the delay did not exist when I enabled at
>>least one PATA port, and I can verify this if you would like.
>
>
> Yeah, that'd be good to know. The PATA controller doesn't show up in
> your lspci results from 5 July, so I'm sure you had it turned off then too.
>
> BIOS reports having 4 disks in your system. Does that match
> what you would expect?
>
> Your boot disk is on this Promise controller, yes?
> 00:0d.0 RAID bus controller: Promise Technology, Inc. PDC20378
> (SATA150 TX) (rev 02)
>
> The second disk is on a different controller though, with its own EDD
> 3.0-compliant BIOS.
> 00:0f.0 RAID bus controller: VIA Technologies,
> Inc. VIA VT6420 SATA
> RAID Controller (rev 80)
> Subsystem: Micro-Star International Co., Ltd. MSI Neo K8T
> FIS2R mainboard
>
> Then BIOS says you've got two more disks.
> Both disks 82 and 83 look remarkably small (20808 sectors each,
> ~10MB). And I would bet there's no media present, as there's no
> mbr_signature field given... So BIOS says there's a disk there, but
> there really isn't. Which could cause the kind of timeout you're
> seeing. To what are these attached? It's the BIOS for this
> controller that's probably what's lying.
One SATA disk is attached to the Promise SATA controller, and one SATA
disk is attached to the VIA SATA controller.
I _think_ the Promise controller boots first, but I could be wrong.
I'll try enabling a PATA port sometime when it isn't 1:30am :)
Jeff
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- Previous message: Benjamin Herrenschmidt: "[PATCH] ppc64: update g5_defconfig"
- In reply to: Matt Domsch: "Re: [PATCH 2.6.9-rc3-mm2] EDD: use EXTENDED READ command, add CONFIG_EDD_SKIP_MBR"
- Next in thread: Matt_Domsch_at_Dell.com: "RE: [PATCH 2.6.9-rc3-mm2] EDD: use EXTENDED READ command, add CONFIG_EDD_SKIP_MBR"
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