Upgrade disks on DL380 G4 mail server

We need to upgrade the disks on a DL380 G4.  It's currently Win 2k3 with Exchange 2003 Enterprise and has six 72.8 disks set us follows

C: Raid 1
D: Raid 5

We're looking to upgrade the 4 disks for D: to 4 x 146gb.

I've read that we should be able to do this with no downtime using the HP Raid software but can't find anything on the HP site or elsewhere about how to do this.  If it cannot be done this way then pse advise the best method.

Thanks
kswan_expertAsked:
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sirbountyConnect With a Mentor Commented:
Not exactly this scenario - this is for adding to your existing disk set - which is similar but not exactly what you're attempting to do.
http://h71019.www7.hp.com/ActiveAnswers/downloads/Performance_Exchange%20Server%202003_HP%20Smart%20Array%206402.pdf

What you're going to do is basically break the RAID 5 4 times.
Make sure you have a good backup first - and make sure you validate that the rebuild has occurred each time a new drive is inserted (check both the ACU and the event logs for status).
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sirbountyCommented:
The 4 disks meaing the 4 comprising your D drive?
Then yes, you would replace disk #1 in the Raid 5 -let it rebuild onto the 146 - get a successful rebuild message - then proceed with disk 2-4 in that same manner.
It will leave you some additional space of which you can expand onto after it's all rebuilt onto the new 146gb drives...
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kswan_expertAuthor Commented:

do you know where i can find documentation on how exactly to do this?
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