Adding Hard Drive to Raid 5

I am having trouble (nervous) in adding a hard disk to my logical drive. I have 3 disks currently in a Raid 5 and i want to add another disk to that current logical drive. The disks are all the same size but i am wondering how i can add the new disk to the already created raid 5 group. I am using Adaptec Storage Manager and my first thought is to initialize the drive and then some how merge it with the other three disks.. any advice would help.

Thanks

Edit: I should explain that there are currently 3 disks in the Raid 5 and i would like to add another disk as possibly a hot spare. I have read a few of the other topics and i am wondering if i initialize the disk, then add it as a hot swap.. would this add it to the 3 other disk and create Raid 5 with 3 + 1 hot? I am running out of disk space on my C drive and want to add more to it.
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Epic7Asked:
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noxchoGlobal Support CoordinatorCommented:
What exact RAID controller is used by you?
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MereteCommented:
I dont know about Raid 5 but if you'd like to hear a quick fix get a USB 2 external hard drive.
If you dont have the cash for usb drive 1 or 2 terrabyte usb2 or ub3
sticking with the usb idea there is also hard drive enclosure for standard hard drive/s
Then you can use it as a usb slave/ even 2 drives as Raid in an enclosure, the good thing here is they run on their own power.
http://www.pcworld.idg.com.au/section/servers_storage/hard_disk_drives_external
http://en.wikipedia.org/wiki/Disk_enclosure
http://www.usb-ware.com/firewire-usb-raid-2-drive-ezraid.htm
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Epic7Author Commented:
noxcho "What exact RAID controller is used by you?"

Controller 1 (adaptec 2120s)
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noxchoGlobal Support CoordinatorCommented:
Better if you backup all partitions on this RAID and rebuild the RAID5 with five drives. Then restore from backup.
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Epic7Author Commented:
noxcho - you hit it on the nose.

What i did:

1. installed new HD in the server
2. remote connected to the server and opened Adaptec Storage Manager
3. clicked the non-used HD and selected Initilize
4. I then clicked on the logical device and clicked create new
5. At that time it allowed me to add the new HD to the current Raid 5 configuration
6. The raid is now rebuilding
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Epic7Author Commented:
I figured it out but had good answeres from the following users.

Thanks
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MereteCommented:
Glad to have helped. Thanks
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