[PlanetCCRMA] Re: [linux-audio-user] planetedge kernels
Joey Reid
joe@joeyreid.com
Wed Oct 13 09:19:01 2004
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woops! Reply doesn't reply to the list, does it... either that or
Mail.app is braindead.
Begin forwarded message:
> From: Joey Reid <joe@joeyreid.com>
> Date: October 13, 2004 1:16:49 PM ADT
> To: Fernando Pablo Lopez-Lezcano <nando@ccrma.stanford.edu>
> Subject: Re: [PlanetCCRMA] Re: [linux-audio-user] planetedge kernels
>
>
> On Oct 13, 2004, at 12:54 PM, Fernando Pablo Lopez-Lezcano wrote:
>>>
>>> "VFS: Cannot open root device "LABEL=/" on unknown-block(0,0)
>>> Please append a correct "root=" boot option
>>> Kernel panic: VFS: Unable to mount root fs on unknown-block(0,0)"
>>
>> What are messages right before this? Just to get a handle of where in
>> the boot process you are at that point.
>>
>
> going from memory, it was loading XFS (quota, acl, etc) and initrd,
> but I am guessing. I will have to check again tonight.
>
>>> I posted this problem on linux-audio, and Fernando you suggested that
>>> the "root=" option would need to contain the scsi device name, since
>>> the newer kernel uses libata and therefore scsi to access SATA disks.
>>> Since my disk under 2.6.5 is called "/dev/hdc5" I tried
>>> "root=/dev/sdc5", but that did not work. I then tried guessing at the
>>> scsi disk number. It would not work with sda5, sdb5, sdc5, sdd5, or
>>> sde5 ;-)
>>
>> Hmmm... what I would have done, I guess. partition "5" is /boot? "5"
>> as
>> the number sounds strange, is this an extended partition? What is
>> partitioning of the disk like? (fdisk -l /dev/hda when booted in the
>> kernel that works).
>>
>
> Disk /dev/hdc: 163.9 GB, 163928604672 bytes
> 255 heads, 63 sectors/track, 19929 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Device Boot Start End Blocks Id System
> /dev/hdc1 * 18655 19929 10241437+ 7 HPFS/NTFS
> /dev/hdc2 1 13 104391 83 Linux
> /dev/hdc3 14 144 1052257+ 82 Linux swap
> /dev/hdc4 145 18654 148681575 f W95 Ext'd (LBA)
> /dev/hdc5 145 18654 148681543+ 83 Linux
>
> Partition table entries are not in disk order
>
>
>>> I don't know if this matters, but my root partition is using XFS
>>> (/boot
>>> is ext3). I know it might matter in that it may not allow using
>>> "LABEL=" (according to some info that google returned), but other
>>> than
>>> that I'm not sure it should matter. I do see the XFS driver loading
>>> immediately before it gives me the above error, so I know that it
>>> must
>>> be included in the initrd.
>>>
>>> soooo, any other ideas?
>>
>> I know the messages probably scroll too fast, but do you see anything
>> related to sdx while the boot is progressing? (just in case, turn off
>> the graphical boot by editing the grub kernel boot command line and
>> erasing the "rhgb -etc-" part).
>>
> I never reach the graphical boot part. I used SHIFT-PGUP to look back,
> but I don't see any messages that mention sdX, and I did look.
>
>> I have never tried xfs so I don't know if that may be the problem.
>> Changing fstab to ommit the label could be an option but first make
>> sure
>> that you can boot into rescue mode with a cd and revert it (if the
>> boot
>> fails).
>
> I'm pretty sure this is all happening before it gets to read
> /etc/fstab, since the message is about the "root=" parameter.
>
> Is there a way to tell a kernel to use an alternate fstab in order to
> switch between kernels if "LABEL=/" doesn't work?
>
>> But you have to find out what is the device name first (what is
>> x in sdx).
>>
>
> can anyone recommend a 2.6.8.1 based livecd? i really can't figure out
> another way to get the device name.
>
> fwiw, this is an nforce2 mb with SiI3112 sata controller and Maxtor
> 6Y160M0 hard disk.
>
> thanks.
>
> --
> Joey Reid
> Integration Specialist
> Alcatel I.C.E.
>
>
--
Joey Reid aka Dr.Whiz-Bang
Geek, musician, and friend of God
http://www.joeyreid.com
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woops! Reply doesn't reply to the list, does it... either that or
Mail.app is braindead.
Begin forwarded message:
<excerpt><bold><fontfamily><param>Helvetica</param><color><param>0000,0000,0000</param>From:
</color></fontfamily></bold><fontfamily><param>Helvetica</param>Joey
Reid <<joe@joeyreid.com>
<bold><color><param>0000,0000,0000</param>Date: </color></bold>October
13, 2004 1:16:49 PM ADT
<bold><color><param>0000,0000,0000</param>To: </color></bold>Fernando
Pablo Lopez-Lezcano <<nando@ccrma.stanford.edu>
<bold><color><param>0000,0000,0000</param>Subject: </color>Re:
[PlanetCCRMA] Re: [linux-audio-user] planetedge kernels
</bold></fontfamily>
On Oct 13, 2004, at 12:54 PM, Fernando Pablo Lopez-Lezcano wrote:
<excerpt><excerpt>
"VFS: Cannot open root device "LABEL=/" on unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on unknown-block(0,0)"
</excerpt>
What are messages right before this? Just to get a handle of where in
the boot process you are at that point.
</excerpt>
going from memory, it was loading XFS (quota, acl, etc) and initrd,
but I am guessing. I will have to check again tonight.
<excerpt><excerpt>I posted this problem on linux-audio, and Fernando
you suggested that
the "root=" option would need to contain the scsi device name, since
the newer kernel uses libata and therefore scsi to access SATA disks.
Since my disk under 2.6.5 is called "/dev/hdc5" I tried
"root=/dev/sdc5", but that did not work. I then tried guessing at the
scsi disk number. It would not work with sda5, sdb5, sdc5, sdd5, or
sde5 ;-)
</excerpt>
Hmmm... what I would have done, I guess. partition "5" is /boot? "5" as
the number sounds strange, is this an extended partition? What is
partitioning of the disk like? (fdisk -l /dev/hda when booted in the
kernel that works).
</excerpt>
Disk /dev/hdc: 163.9 GB, 163928604672 bytes
255 heads, 63 sectors/track, 19929 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hdc1 * 18655 19929 10241437+ 7 HPFS/NTFS
/dev/hdc2 1 13 104391 83 Linux
/dev/hdc3 14 144 1052257+ 82 Linux swap
/dev/hdc4 145 18654 148681575 f W95 Ext'd (LBA)
/dev/hdc5 145 18654 148681543+ 83 Linux
Partition table entries are not in disk order
<excerpt><excerpt>I don't know if this matters, but my root partition
is using XFS (/boot
is ext3). I know it might matter in that it may not allow using
"LABEL=" (according to some info that google returned), but other than
that I'm not sure it should matter. I do see the XFS driver loading
immediately before it gives me the above error, so I know that it must
be included in the initrd.
soooo, any other ideas?
</excerpt>
I know the messages probably scroll too fast, but do you see anything
related to sdx while the boot is progressing? (just in case, turn off
the graphical boot by editing the grub kernel boot command line and
erasing the "rhgb -etc-" part).
</excerpt>I never reach the graphical boot part. I used SHIFT-PGUP to
look back, but I don't see any messages that mention sdX, and I did
look.
<excerpt>I have never tried xfs so I don't know if that may be the
problem.
Changing fstab to ommit the label could be an option but first make
sure
that you can boot into rescue mode with a cd and revert it (if the boot
fails).
</excerpt>
I'm pretty sure this is all happening before it gets to read
/etc/fstab, since the message is about the "root=" parameter.
Is there a way to tell a kernel to use an alternate fstab in order to
switch between kernels if "LABEL=/" doesn't work?
<excerpt>But you have to find out what is the device name first (what
is
x in sdx).
</excerpt>
can anyone recommend a 2.6.8.1 based livecd? i really can't figure out
another way to get the device name.
fwiw, this is an nforce2 mb with SiI3112 sata controller and Maxtor
6Y160M0 hard disk.
thanks.
--
Joey Reid
Integration Specialist
Alcatel I.C.E.
</excerpt>--
Joey Reid aka Dr.Whiz-Bang
Geek, musician, and friend of God
http://www.joeyreid.com
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