Re: [Ltib] Booting from SDHC

[Stuart Hughes]

Hi Carolyn,

Make sure write protect is not set (the tiny mechanical tab)

Also, you will probably need to format the SD card to something like
ext2 (or ext3/ext4 without a journal).

When booting, you need to tell the kernel to wait for the SD card, so
you'll need to add rootwait, for example:

root=/dev/mmcblk0p1 rw rootwait

Regards, Stuart

Reer, Carolyn (SA-1) wrote:
> Has anyone booted the kernel from SDHC card?
> 
> I have 2.6.28 kernel built for Freescale MPC8536E and booting from NFS.
> 
> I would like to copy the kernel & file system over to SD card to
> eliminate NFS from my Ethernet traffic timing tests.
> 
> I have tried 2-4GB SDHC cars and they are pre-formatted with W95 FAT16
> partitions.
> 
> I can mount the partition:
> 
> mount /dev/mmcblk0p1 /mnt/tmp/
> 
> But I can’t write to it.
> 
>  
> 
> I tried using fdisk to delete the partition and make a new linux
> partition; tried changing the FAT16 partition to linux partition.
> 
> But I can’t save the changes.
> 
>  
> 
> I was able to mount the drive:
> 
> mount /dev/mmcblk0 /mnt/tmp/
> 
> But I have less than 256MB to write to.
> 
>  
> 
> Thanks
> 
> Carolyn Reer
> 
> 
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