re-partiton / re-installation on Redhat 7.3

Hello, me and a friend currently operate a dedicated server our /dev/hda2 is starting to get full and we have a lot of information in there we would like to keep, so we are thinking about adding an additional 120GB HD then reinstall the OS to re-partition the partitions,

our current setup looks like this

==============================================
Filesystem Size Used Avail Use% Mounted on
/dev/hda6 1011M 150M 810M 16% /
/dev/hda1 99M 13M 80M 14% /boot
/dev/hda8 61G 201M 58G 1% /home
none 251M 0 250M 0% /dev/shm
/dev/hda5 1011M 33M 927M 4% /tmp
/dev/hda2 4.9G 3.9G 868M 82% /usr
/dev/hda3 3.9G 149M 3.5G 4% /var

When we get our 120GB drive, this is how we would like to set it up as far as adding space to the the partitions and creating partitions

==============================================
/dev/hda_ 80G 0.0G 80G 0% /backup <---------- Newly Added Partition
/dev/hda_ 10G 0.0G 10G 0% /home2 <---------- Newly Added Partition
/dev/hda_ 05G 0.0G 05G 0% /home3 <---------- Newly Added Partition
/dev/hda_ 05G 0.0G 05G 0% /home4 <---------- Newly Added Partition

/dev/hda5 05G 0.0G 00G 0% /tmp <---------- Add to current /tmp volume = 05.1GB Total
/dev/hda2 10G 0.0G 00G 0% /usr <---------- Add to current /usr volume = 15.0GB Total
/dev/hda3 05G 0.0G 00G 0% /var <---------- Add to current /var volume = 08.0GB Total

So would this setup work out alright?
Thanks

If you're using both drives at the same time (and on the same IDE cable), there has to be a /dev/hdb in there somewhere...

It looks ok but what do you mean by 'work out alright'?

Also, the partitionns listed as hda_ what is that all about?
Would they be further logical partitions in the extended partition of hda that you don't know the partition number for?

O.o
if you're *adding*another HDD, I still think there should be at least one /dev/hdb heading...