So basically the tech company that my current employer set the server up with 1x 2 TB HDD. They partitioned that one HDD into 6 different partitions of varying sizes and set the entire set-up into a raid 5 set-up.

Now today, we got partition 1 in the HDD that failed (boot-up detects Partition 0,2,3,4,5)

I know that the usual recovery for multi-HDD Raid 5 set-up is just replace the failed hard drive and go into partition recovery mode, but I have no idea how to recover the data from the corrupted/failed partition on a single HDD w/ 6 partitions in Raid 5 mode.

Anyone have any idea how to fix the issue or would we have to pay our contractor $1000 to get the data back and fix the issue?

I was also thinking of making the server into a Raid 5+1 set-up so there's a redundant copy as back up if/when it fails again.

Yeah. Delete the topic. I fixed the issue already. The server is actually 6 pysical HDDs in Raid 5 and 1 HDD with the OS. The HDD with the OS died and I just replaced it and reinstalled it.