Date: Wed, 17 May 2006 16:24:47 +0200
From: Willy Tarreau <willy@w.ods.org>
To: George Nychis <gnychis@cmu.edu>
Cc: linux-kernel@vger.kernel.org, linux-lvm@redhat.com
Subject: Re: need help booting from SATA in 2.4.32
Message-ID: <20060517142447.GA27602@w.ods.org>
References: <446A36B8.1060707@cmu.edu> <20060516203917.GQ11191@w.ods.org> <446A418E.3070307@cmu.edu> <20060517034814.GA25818@w.ods.org> <446B2523.1040800@cmu.edu>
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On Wed, May 17, 2006 at 09:29:07AM -0400, George Nychis wrote:
> 
> 
> 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

I don't agree, I have one machine running 2.4.32 + a few patches to get it
up to date with 2.4.33-pre as of 2006/01. And it is running quite well with
ata_piix :

# dmesg |grep ata
libata version 1.20 loaded.
ata1: SATA max UDMA/133 cmd 0x24F8 ctl 0x2812 bmdma 0x24D0 irq 18
ata2: SATA max UDMA/133 cmd 0x2800 ctl 0x2816 bmdma 0x24D8 irq 18
ata1: dev 0 cfg 49:2f00 82:3069 83:5801 84:4003 85:3069 86:1001 87:4003 88:203f
ata1: dev 0 ATA-6, max UDMA/100, 156301488 sectors: LBA
ata1: dev 0 configured for UDMA/100
ata2: SATA port has no device.
scsi0 : ata_piix
scsi1 : ata_piix

# grep -i piix /proc/ikconfig/config      
CONFIG_BLK_DEV_PIIX=y
CONFIG_SCSI_ATA_PIIX=y
CONFIG_I2C_PIIX4=m

So it seems like even BLK_DEV_PIIX was enabled without problem. However, as
you can see, the ata_piix driver was slightly more recent than in 2.4.32 :

@@ -32,12 +50,13 @@
 #include <linux/libata.h>
 
 #define DRV_NAME       "ata_piix"
-#define DRV_VERSION    "1.03"
+#define DRV_VERSION    "1.05"

So I would suggest that you retry with the most recent 2.4.33-pre, it *must*
work.

> 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?

I don't know, but let's first get SATA working. Fixing low level first
is the only solution to progress in a diagnostic.

> 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

Regards,
Willy

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