RAID failed - Can't find status in disk utility

I have an Xserve G5 with 3 hitachi 80GB SATA hard drives with a RAID 5 (I think) running 10.4.6. A couple of days ago, the server was running really slow and the afp was taking up alot of cpu time, so we rebooted the server as we haven't had a problem with afp before. However, the server would no longer boot up and the RAID alarm started going off. Now when booting the server I get the apple screen and after a couple of minutes, the server's fan would start going faster and faster until they would be going full blast. So I tried to check the status using disk utility of the RAID, but I can't see any status. I admit that I have only been working with the xserve for almost a year and I don't know alot, but all I see on the left of the disk utility is xserve megaraid and below that Server HD. I checked both of these and clicked on all of the tabs (first aid, RAID, partition, restore, etc), but I can't find a place to check the status of the RAID. All I can find about RAID is how to create another one. I finally found that I can run megaraid -showstatus and it said that the first hard drive failed and the other 2 were online. I also took out the hard drive and ran hitachi's test drive software using the advanced test and it said everything was fine. So I'm not sure if there is just something wrong with the RAID or what.
I did order another hard drive that is exactly the same and it should be here in a couple of days. I also know that this is the hard drive that was accidentally ejected while the server was running before, but when the hard drive was put back in, the RAID rebuilt it and has been running fine till now. I am pretty sure that I shut the server off before when the hard drive got ejected and it would boot, so I'm just not sure exactly what this all means as the Hitachi software tells me there is nothing wrong with the drive.
Help please

I checked the status of the server and hard drive by booting off of the 10.4 installation disk, select utilities and disk utility.
I know very little about terminal, however I'm pretty good at dos so I can figure some things out if given some commands.
Anyway, I ran some commands and here are the results:
megaraid -showstatus
MEGARAID CLI version 1.0.12
No cmd argument
Um, so I think I remebered the command incorrectly and I did -showdevices instead. Sorry.
megaraid -showdevices
Physical devices Available = 3
Drive ID Identification Size(MB) Status
0 Hitachi HDS722580VLSA80 78529 Failed
1 Hitachi HDS722580VLSA80 78529 Online
2 Hitachi HDS722580VLSA80 78529 Online
diskutil list
/dev/disk0
#: type name size identifier
0: Applepartitionscheme *153.3GB disk0
1: Applepartitionmap 31.5KB disk0s1
2: AppleHFSServer HD 153.2GB disk0s3
/dev/disk1
#: type name size identifier
0: Applepartitionscheme *2.6GB disk1
1: Applepartitionmap 31.5KB disk1s1
2: AppleDriveATAPI 4.0KB disk1s2
/dev/disk2
#: type name size identifier
0: untitled *467.0KB disk2
/dev/disk3
#: type name size identifier
0: untitled *95.0KB disk3
/dev/disk4
#: type name size identifier
0: untitled *95.0KB disk4
/dev/disk5
#: type name size identifier
0: untitled *95.0KB disk5
/dev/disk6
#: type name size identifier
0: untitled *219.0KB disk6
megaraid -showconfig
Logical Drive RAID Level Stripe Size(KB) Size(MB) Status
0 5 64 156958 Degraded
megaraid -showapater
FW Version = A130
Bios Version = G117
Product Name = MegaRAID SATA 150-4D
Cache Size = 64MB
diskutil checkRAID
No RAID sets found
Thank you for your help. I really appreciate it and so do the teachers and the students!

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