Message-ID: <446B2523.1040800@cmu.edu>
Date: Wed, 17 May 2006 09:29:07 -0400
From: George Nychis <gnychis@cmu.edu>
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To: Willy Tarreau <willy@w.ods.org>
CC: linux-kernel@vger.kernel.org, linux-lvm@redhat.com
Subject: Re: need help booting from SATA in 2.4.32
References: <446A36B8.1060707@cmu.edu> <20060516203917.GQ11191@w.ods.org> <446A418E.3070307@cmu.edu> <20060517034814.GA25818@w.ods.org>
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Willy Tarreau wrote:
> On Tue, May 16, 2006 at 05:18:06PM -0400, George Nychis wrote:
>>
>> Willy Tarreau wrote:
>>> On Tue, May 16, 2006 at 04:31:52PM -0400, George Nychis wrote:
>>>> Hi,
>>>>
>>>> I've booted from a SATA drive in 2.4.32 before, but for some reason
>>>> 2.4.32 will not recognize this disk.  It is recognized when I boot 2.6.9
>>>> though.
>>>>
>>>> It uses the ata_piix module in both kernels.  Whenever I boot 2.6.9 I see:
>>>> ----------------------------------------------------------------------
>>>>  SCSI subsystem initialized
>>>>  ACPI: PCI interrupt 0000:00:1f.2[B] -> GSI 7 (level, low) -> IRQ 7
>>>>  ata: 0x170 IDE port busy
>>>>  ata1: SATA max UDMA/133 cmd 0x1F0 ctl 0x3F6 bmdma 0xBFA0 irq 14
>>>>  ata1: dev 0 ATA, max UDMA/100, 78140160 sectors:
>>>>  ata1(0): applying bridge limits
>>>>  ata1: dev 0 configured for UDMA/100
>>>>  scsi0 : ata_piix
>>>>    Vendor: ATA       Model: FUJITSU MHV2040A  Rev: 0000
>>>>    Type:   Direct-Access                      ANSI SCSI revision: 05
>>>>  SCSI device sda: 78140160 512-byte hdwr sectors (40008 MB)
>>>>  SCSI device sda: drive cache: write back
>>>>   sda: sda1 sda2 sda3 sda4 < sda5 >
>>>>  Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
>>>>  device-mapper: 4.1.0-ioctl (2003-12-10) initialised: dm@uk.sistina.com
>>>> ------------------------------------------------------------------------
>>>>
>>>> However in 2.4.32 all i see is:
>>>> ----------------------------
>>>>  SCSI subsystem initialized
>>>> ----------------------------
>>>>
>>>> I am positive that my 2.4.32 has been compiled with ata_piix as a
>>>> module, and it does reside in /lib/modules/2.4.32/kernel/driver/scsi/
>>>>
>>>> Any clues?
>>> Could you retry with it statically linked in the kernel ? I vaguely
>>> remember that if the original PIIX4 driver registers the device first,
>>> then ata_piix cannot get it. You could also ensure that you have
>>> properly removed CONFIG_IDE_PIIX4 (I believe it's called like this).
>>>
>>>> Thanks!
>>>> George
>>> Regards,
>>> Willy
>>>
>>>
>> Thanks for the help Willy,
>>
>> I think you're on to something.  I noticed this during the 2.4.32 kernel
>> bootup:
>> -----------------------------------------------------------------
>> hda: FUJITSU MHV2040AH, ATA DISK drive
>> hda: attached ide-disk driver.
>> hda: host protected area => 1
>> hda: 78140160 sectors (40008 MB) w/8192KiB Cache, CHS=4864/255/63
>> -----------------------------------------------------------------
>>
>> However i can't find CONFIG_IDE_PIIX4 in .config anyhwere.  I did find
>> CONFIG_BLK_DEV_PIIX so i tried disabling it, but the device still
>> registered under hda.
> 
> OK, you correctly removed the one I was thinking about. You should also
> remove other CONFIG_BLK_DEB_IDE* and CONFIG_IDEDMA*, because there is
> also a generic PCI support for IDE controllers. Most probably your
> drive has been detected on a generic PCI controller. At least, just for
> a test, completely disable IDE to be sure, and enable ata_piix. As long
> as you'll not see your disk as sda, it will not work.
> 
>> If i build it statically, i get this error trying to boot:
>> ----------------------------------------------------------------------
>> kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2
>> Kernel panic: VFS: Unable to mount root fs on 00:00
>> ----------------------------------------------------------------------
>>
>> AND it still finds the drive as /dev/hda
>>
>> Therefore I built it as a module and put "alias scsi_hostadapter
>> ata_piix" in /etc/modules.conf" to atleast eliminate the
>> scsi_hostadapter thing
>>
>> This is FC3, and my root is actually an LVM, so i get:
>> NVS: Cannot open root device "VolGroup00/LogVol00" or 00:00
>>
>> So i'm thinking once the drive shows up as /dev/sda, the LVM will be
>> proper, and VolGroup00/LogVol00 will show up.
> 
> I don't know, I'm a terrible loser when it comes to LVM unfortunately.
> I just hope you're right :-)
> 
>> Any more ideas?
>>
>> Thanks!
>> George
> 
> Regards,
> willy
> 
> 

Good suggestion on disabling IDE, it does not show up as SATA, it simply
doesn't show up... after some googling, it seems as though no one has
gotten it as SATA in 2.4:
http://wip.powerblogs.com/posts/1124302626.shtml
http://www.linuxquestions.org/questions/showthread.php?t=400521

Ok so, lets just assume we can't get SATA, and lets just try to get it
to boot as /dev/hda ... so now i know nothing about LVM, can anyone
provide me any insight on how to get this to boot with LVM?

So in 2.6.9, it loads VolGroup00/LogVol00 from /dev/sda5 which shows up
in fdisk as LVM.  How can i get this to load from /dev/hda5 instead?

Thanks!
George
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