You can (attempt to) mount a lv "partial" - LVM will drop the missing device(s). Truncating a filesystem makes an awful mess - fsck will fix the f/s; your files are your responsibility. It is possible you can get files back - but the fsck will "fix" any files where necessary. Check "lost+found" for fragments.
The only sensible alternative is to add new volume(s) and restore.

thanks everyone for the help! seems to be working. Only thing I did was just change the path of my scripts from /backup to /backups (which I am sure I could have kept the same name, but just for testing purposes)
so that directory is completely dedicated on 1TB for just back ups.

what I pretty much did was use - for people who are curious about partitioning and adding a new drive.

#sudo lshw -C disk (let it run)
#fdisk /dev/sdb
#n
#p
#1
#1
#w

then

# df -h (searched for /dev/sdb1 and made sure it had the memeory)
mkdir /backups
mount /dev/sdb1 /backups
vim /etc/fstab and add the line in there


mount /dev/sdb1

The format I used was ext3, which I gues sit is a standard for ubuntu machines

Later on, I am going to do a virtual server (just virtual box or KVM, nothing crazy) and do some ZFS snapshots and keep anyone who is interested

Of course.
Thanks, that's about what I thought - you are trading the added features for a multiplied risk of failure.