备份分区信息：shell - # /sbin/fdisk /dev/sda -l >/tmp/pattern.bak备份MBR：shell - # dd if=/dev/sda of=/tmp/mbr bs=512 count=1说明：主引导记录512字节中前446是MBR代码,后64字节包含分区表信息，最后2字节标识是MBR。恢复分区表：shell - # dd if=/tmp/mbr of=/dev/sda bs=1 skip=446 count=66