hello
I will answer the second part of your question!
as you can see, the numbers you asked about are located in the 5th and 6th column of /etc/fstab, here's a brief discription of these columns:
Quote:
The 5th column in /etc/fstab is the dump option. Dump checks it and uses the number to decide if a filesystem should be backed up. If it's zero, dump will ignore that filesystem. If you take a look at the example fstab, you'll notice that the 5th column is zero in most cases.
The 6th column is a fsck option. fsck looks at the number in the 6th column to determine in which order the filesystems should be checked. If it's zero, fsck won't check the filesystem.
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you can read more about this
here