sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
sd 0:0:0:0: [sda] Attached SCSI removable disk
mount -t vfat /dev/sda1 /mnt
Or if the windows formats the CF without part,
mount -t vfat /dev/sda /mnt
after you finish the access, you must umount to flush the disk cache, or the data might lose.
If you want to connect to IDE HDD or CD/DVDRW interface, fewer signals are required than CF. If you use Altera dev board, you may find some 40 pins headers which can be used to connect to IDE drives. You need to add CF component in SOPC builder, assign the pins, and regenerate sof.