HP Proliant DL380 G7-Expand RAID 1

Hi I have a HP Proliant DL380 G7 server with 2x300 GB HDD in RAID 1. I need to add another 2x300 so I want to expand the current RAID 1 but I do not know how...
The system has Windows 2012 server
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andyalderConnect With a Mentor Commented:
You need to have a cache battery on the controller to allow array expansion, 462967-B21 if you have a 512MB module without battery. The Array Configuration Utility will tell you if it is fitted, select the controller and click "more information".

Other than fitting the battery if needed you just add the disks live, then select the array in the ACU and expand is one of the options, you don't see it unless there are unallocated disks and a battery present. After expanding the array you can either create a new logical disk in the extra space or extend a current one, be careful not to expand a logical disk past 2TB unless it's GPT (so can't be done for C:.)

ACU is under start-HP system tools or download it from www.hp.com/go/support.
Daniel HelgenbergerConnect With a Mentor Commented:
Do you want to replace the old drives? Add new?
What is your operating system on the server?
If Linux, is it LVM enabled?

For general info on how to expand a RAID set, see HP docs:

Page 16, 'Expanding an array'
nonlinearlyAuthor Commented:
I think I was clear...
additional drives
windows 2012
Do not force me to said the same again... read carefully
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nonlinearlyAuthor Commented:
Ok.. I downloaded the acu and installed it... It shows me the current array with one logical drive of 300 GB that consist of 2x300 physical drives. I made expand and then extend it in the new unused space... but the new extended logical drive is not 600 GB as it should be. It is 558.7 GB (!!!). Also the RAID changed from RAID 1 to RAID 1+0 (!!!)
nonlinearlyAuthor Commented:
Ok found it... hard disk's nominal space value is in decimal so 300 GB is 300x10^9 bytes so if I divide 300 with 1.073741824 then everything ok...
As far as the RAID level changing I think you'll find it said RAID 1+0 before when you had two disks even though technically that's RAID 1 rather than 10. Unless they've changed it in the latest version the ACU calls RAID 1 RAID 1+0 because the algorithm is the same in that you skip to the next pair after writing one stripe element, it's just that the next pair is the same as the current pair with only 2 disks.
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