How to get internal hard disk working in Lubuntu?

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http://askubuntu.com – Previously, I had in this Windows installed on this computer, but then I installed lubuntu. There are two HDDs in this computer, and I installed lubuntu in the other, which I had split into two partitions. The partitions which didn't have lubuntu, were formated as ntfs and had some videos on other stuff and they did work properly in lubuntu. Now I have formatted those partitions with ext4, and now when i start my computer, there are two errors: An error occurred while mounting /media/sdb1 The disk drive for /media/sda5 is not ready yet or not present and I have to press S in both cases. I (HowTos)