[NTLUG:Discuss] DD Assistance? - RESOLVED

[Fred Hensley]

Found the problem...

When attempting to confirm the installed filesystem type on the 32MB
compact flash card via "file -s", I noticed that sdb1 came up as x86...

I redid the dd command as follows:

dd if=dsclinux-32.img of=/dev/sdb bs=1k  (used sdb instead of sdb1)

The result provided me with an ext3 filesystem on sdb1 and x86 on sdb,
which looks/smells like lilo on the MBR...

Okay, off to the next issue...

Fred Hensley

On Thu, 2006-03-02 at 19:59 -0600, Fred Hensley wrote:
> I have received a vendor-generated image file (dsclinux-32.img) provided
> for installation onto a proprietary 32MB flash disk module.  The
> bytes-per-sector for the flash module appears to be 1K.  The image file
> is supposed to create a complete ext2 formatted tiny linux system for an
> embedded single board computer (SBC). 
> 
> The command syntax the SBC manufacturer recommends using is as follows:
> 
> dd if=dsclinux-32.img of=/dev/hdc bs=1k
> 
> However, I wish to instead write this image to a standard Sandisk 32MB
> or 64MB compact flash module.  My hotplug system recognizes the compact
> flash as /dev/sdb, and my newly created linux partition is /dev/sdb1.  I
> used fdisk to create a 32MB linux partition, and also make it boot-able.
> 
> Once the partition is successfully created, I use the following command:
> 
> dd if=dsclinux-32.img ibs=1k of=/dev/sdb1 obs=512
> 
> Note I set the output bytes-per-sector to 512 since that follows what
> Sandisk reports their compact flash to be.  The dd command completes
> without error, but I am not able to successfully mount the drive
> afterwards using the command "mount -t ext2 /dev/sdb1 /media/cflash".
> The error reported is that the filesystem is not recognized.
> 
> I have also tried variations of running "mke2fs /dev/sdb1" **after** the
> successful partion and **before** using "dd".  One other variation of dd
> I attempted added the parameter "cbs=512", but no success...
> 
> Anyone notice anything obvious (or slippery) I am missing here?
> 
> Thanks in advance for any suggestions.
> 
> Fred Hensley
> 
> p.s.  My linux distribution is Ubuntu 5.10 breezy on an x86 platform.
> the SBC target is also an x86 compliant platform.
> 
> 
> 
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