Kubuntu 安装出错！

[alertsniper]

这是出错信息：
The test of the file system with type fat32 in partition #7 of SCSI1 (0,0,0) (sda) found uncorrected errors.

If you do not go back to the partitioning menu and correct these errors, the partition will be used as is.

还有这个：
The file system on /dev/sda2 assigned to /var has not been marked for formatting. File systems used by the system (/, /boot, /usr, /var) must be reformatted for use by this installer. Other file systems (/home, /media/*, /usr/local, etc.) may be used without reformatting.

这是怎么回事？怎么解决？