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Creating and Mounting a Filesystem on a CompactFlash Card

  1. Boot the OSK from the JFFS2 filesystem stored on the flash. If you have previously changed your kernel parameters to boot from your Linux Host machine, you can revert back to booting from the flash by issuing the following command to U-Boot:
    setenv bootargs console=ttyS0,115200n8 noinitrd rw ip=off 
          root=/dev/mtdblock4 mem=30M
  2. Insert a CompactFlash memory storage card (for example, Sandisk) into the CompactFlash slot on the OSK.
    
    
    
  3. Change to the directory where the IDE drivers reside. Enter the following command:
    cd /lib/modules//kernel/drivers/ide
  4. Install the loadable kernel modules. Enter the following commands:
    insmod ide-mod.o
    insmod ide-probe-mod.o
    insmod ide-disk.o
    insmod ide-cs.o
  5. Start the PCMCIA services. Enter the following command:
    /etc/init.d/pcmcia start
    
  6. The CF card will now be detected. Information similar to the following appears:
    hda: SanDisk SDCFB-128, ATA DISK driver
    ide0 at 0x000-007,0x00e in irq 222
    hda: 250880 sectors (128MB) w/1KiB Cache, CHS=980/8/32
    
    Partition check:
    /dev/ide/host0/bus0/target0/lun0: p1
    ide_cs: hda: Vcc = 5.0, Vpp = 0.0
    
    Note: Steps 6 and 7 use the fdisk and mkfs.ext2 commands stored on the JFFS2 flash filesystem on the OSK to partition and create a filesystem on the CF card. These utilities are not included with the Montavista Preview Kit, and are only available on the flash filesystem. If the CompactFlash card being used has already been set up with a partition and filesystem, please skip to step 9.
    
    
    
  7. Use the fdisk command to create a partition on the card:
    fdisk /dev/ide/host0/bus0/target0/lun0/disc
    Enter 'n' to create  new partition. (answer the questions)
    Enter 'w' to write the partition table.
    
  8. Here is an example of using fdisk to create a partition:
    Command (m for help): n
    Command action
       e   extended
       p   primary partition (1-4)
    p
    Partition number (1-4): 1
    First cylinder (1-490, default 1): 1
    Last cylinder or +size or +sizeM or +sizeK
      (1-490, default 490): 490
    
    Command (m for help): w
    The partition table has been altered!
    
    Calling ioctl() to re-read partition table.
     /dev/ide/host0/bus0/target0/lun0: p1
    
    WARNING: If you have created or modified any DOS 6.x
    partitions, please see the fdisk manual page for additional
    information.
    Syncing disks.
    
  9. Use the mkfs.ext2 command to create a partition on the card:
    mkfs.ext2 /dev/ide/host0/bus0/target0/lun0/part1
    
    mke2fs 1.27 (8-Mar-2002)
     /dev/ide/host0/bus0/target0/lun0: p1
     /dev/ide/host0/bus0/target0/lun0: p1
    Filesystem label=
    OS type: Linux
    Block size=1024 (log=0)
    Fragment size=1024 (log=0)
    7840 inodes, 31344 blocks
    1567 blocks (5.00%) reserved for the super user
    First data block=1
    4 block groups
    8192 blocks per group, 8192 fragments per group
    1960 inodes per group
    Superblock backups stored on blocks:
            8193, 24577
    
    Writing inode tables: done
    Writing superblocks and filesystem accounting
      information: done
    
    This filesystem will be automatically checked
    every 30 mounts or 180 days, whichever comes first.
    Use tune2fs -c or -i to override.
    
  10. Finally, to mount one of the partitions on the card, enter the following command
    mount /dev/ide/host0/bus0/target0/lun0/part1 /mount_point 
    
  11. That's it! Now cd into the directory you mounted the card to, and copy files back and forth as you normally would with a hard disk.
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