Adding additional hard disks to existing RAID 1 configuration

I have HP prolieant DL G5 servers with two 147 GB HDD configured in RAID 1 configuration. The OS on system is Windows 2008 server  Enterprise edition 32 bit. I want to add two more HDD of 600 GB each to enhance storage capacity of my server, without formatting my existing OS and system configuration. Can this be done or what will be best method fo enhancing the HDD capacity in RAID 1 configuration.
maverick140977Asked:
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TeeshirtCommented:
Hello,

Which ProLiant DL G5 server is it ? DL 120 / DL 160 / DL 165 / DL 380 / DL 580 ?

1) Shutdown the server.
2) Plug in the 2x 600GB drives.
3) Boot the server & wait for the raid card initialization.
4) It will prompt you to press "F8" to enter configuration mode.
5) Once inside the configuration mode, select create a raid1 array & select the 2x 600GB physical disks.
6) Reboot the server & windows should detect a new drive.
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mbkitmgrCommented:
Provided you have the bays/cables you should be able to
1 - Shut down the server
2 - Add the drives (I know they are hot plug but I have been caught with the Proliants over the years having a hissy fit when it's done)
3 - Boot the server and use the appropriate keystroke to select the raid config util
4 - The util is fairly simple, you'll select the drives set the type of raid, and save the config.

The new drives will be setup as an additional drive (if you mirror them with RAID 1) to the OS.  You cant add them to the existing mirror set without a reformat (there are more significant reasons).

You'll need to go into disk management to format them as NTFS or whatever you choose.
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andyalderCommented:
You donn't need to shut down, just add the disks, go into the array configuration utility (under start programs hp system tools if installed) and make a new array and logical disk. You can't add them to the current array (well you can but then you would only get 146GB extra out of each 600GB disk).
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maverick140977Author Commented:
Thanks,

The solution really helped.
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andyalderCommented:
It can cause data loss if you fit the drives with it powered off if they are second hand and not erased properly.
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