intel galileo 问题

Question

插入含有“bigger linux image"的sd卡时，引导启动项有如下显示
GNU GRUB version 0.97 (604K lower / 244604K upper memory)

+-------------------------------------------------------------------------+

| ---- No "boot/grub/grub.conf" file found on 1st USB or SD device ---- |

| Clanton SVP kernel-SPI initrd-SPI IMR-On IO-APIC/HPET NoEMU |

| Clanton SVP kernel-SPI initrd-MassStorage big-rootfs IMR-On IO-APIC/H> |

| Clanton SVP kernel-MassStorage initrd-MassStorage small-rootfs IMR-On> |

| Clanton SVP kernel-MassStorage initrd-MassStorage big-rootfs IMR-On I> |

| Clanton SVP kernel-MassStorage initrd-MassStorage big-rootfs IMR-On I> |

明明sd卡已经插里了，但为什么还是提示| ---- No "boot/grub/grub.conf" file found on 1st USB or SD device ---- |，而且无法加载sd卡中的linux系统