单项选择题 You created a snapshot of the /data2 filesystem as follows：   # fssnap -F ufs -o bs=/data2/snap /data2   But， the system responds with the following error： snapshot error： Invalid backing file path   What is the problem？ （）

单项选择题 A snapshot of the /export/project file system has been taken. Prior to backing up the file system， you need to check to see if certain files are on the snapshot. The snapshot needs to be mounted to check for these files.  Which command will mount the snapshot？ （）

单项选择题 Your x86-based server will not boot Solaris 10 OS. You discover that you need to restore your pboot and boot block on the / （root） slice located on disk c0d0. You first boot off of the CD-ROM or DVD into single user mode.  What commands should you run to restore the pboot and boot block on the slice？（）