[clue-tech] Compaq Armada 3500 woes

[Jim Ockers]

Bill,

The kernel VFS maintains a list of mounted filesystems in /proc/mounts.  
If your root (/) filesystem and /boot are not mounted or not found in 
/etc/fstab then some of the tools you're trying to use might complain.

What does "cat /proc/mounts" return?  Is it a list of mounted 
filesystems and devices?  What is in /etc/fstab (do "cat /etc/fstab" to 
find out).  If /etc/fstab is broken or not there, just do "cat 
/proc/mounts > /etc/fstab" to rebuild it.  You will need to be root for 
that of course.

Then try your grub tools again.

HTH
Jim

Bill Smith wrote:
> Hi Jim, the otuput to the 1st command is: brw-rw---- 1 root disk 8, 0 
> Nov 23 15:28 /dev/sda and the /dev/sda is in yellow
> The output to the 2nd is: mknod: '/tmp/sda': Operation not permitted
> Then I realized I was not root, did that and tried again. Same for the 
> 1st output. 2nd output is: back at the prompt, then for grub-install 
> /dev/sda the output is, 1st line: grub-probe: error: cannot find a 
> device for / (is /dev mounted?). 2nd line: grub-probe: error: cannot 
> find a dvice for /boot/ (is /dev mounted?). 3rd line: Could not find 
> device for /boot: Not found or not a block device>
>  
> ------------------------------------------------------------------------
> Date: Tue, 23 Nov 2010 09:32:47 -0700
> From: ockers at ockers.net
> To: clue-tech at cluedenver.org
> Subject: Re: [clue-tech] Compaq Armada 3500 woes
>
> Hi Bill,
>
> If you ever get a "/dev/sda: not found" type message, please do the 
> following to see if it exists:
>
> ls -al /dev/sda
>
> If there is no device node for that device, you either need to mount 
> the automagic /dev filesystem that will populate the directory based 
> on the device drivers loaded into the kernel, or else consider 
> creating it yourself.  IIRC sda is 8,0:
>
> mknod /dev/sda b 8 0
>
> If you can't write to the /dev directory, then create the device node 
> in /tmp:
>
> mknod /tmp/sda b 8 0
>
> Then you can use your other commands such as grub-install to access 
> that device.  The major & minor numbers on the device node "file" tell 
> the kernel what device driver will handle the ioctl()s.  If the SCSI 
> device driver chain is not loaded into the kernel then you wouldn't be 
> able to access /dev/sda either, so make sure all the necessary driver 
> modules are loaded if you have any trouble using a SCSI block device node.
>
> HTH,
> Jim
> -- 
> Jim Ockers, P.Eng. (ockers at ockers.net <mailto:ockers at ockers.net>)
> Contact info: http://www.ockers.ca/pason.html
>   
>
> Bill Smith wrote:
>
>     I'm a relative newbie, so exactly what are the commands, and in
>     what order? Thanks Bill
>      
>     ------------------------------------------------------------------------
>     Date: Tue, 23 Nov 2010 09:15:40 -0700
>     From: g1ccross at gmail.com <mailto:g1ccross at gmail.com>
>     To: clue-tech at cluedenver.org <mailto:clue-tech at cluedenver.org>
>     Subject: Re: [clue-tech] Compaq Armada 3500 woes
>
>     I think you need to mount /dev to to chroot before chrooting. Try
>     mount -o bind /dev /mnt/dev. I am not sure but I usually mount
>     proc in the chroot also.
>     On Nov 23, 2010 9:08 AM, "Bill Smith" <wpsmithii at msn.com
>     <mailto:wpsmithii at msn.com>> wrote:
>     >
>     > Hi all, I dug around and found a grub install procedure for
>     Knoppix. Here's what happened. First I did "fdisk -1" and I got 3
>     partitions as I had installed. The boot was /dev/sda1 and it was
>     listed as ID: 83 ,system: linux, this should be ext3, the start
>     was 1 end was 2374, 19+ Gig. The commands I used as root are as
>     follows:
>     > mount -t ext3 -o rw /dev/sda1 /mnt
>     > chroot /mnt
>     > grub-install /dev/sda
>     > The feedback from this was
>     > /dev/sda: Not found or not a block device
>     >
>     >
>     > Thanks in advance. Bill
>
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