installing a new HDD to RAID5

Hi all
I have a windows server 2003 with Raid 5 installed over 3 HDD
One of my HDD have failed so I have perched a new one
This drives are 250GB hot swappable SATA drives

I have removed the failed HDD and inserted the new HDD and am ready to boot the system

So my question is what will happen when I boot
Will the data just write to the new HDD automatically or do I have to do anything first EG: initialize the new disk  

Any advice greatly appreciated
IP4IT StaffAsked:
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meteorelecConnect With a Mentor Commented:
yes you will see on boot up an option to push F1 etc to boot into your raid controller

here you add the disk to your array

if you still have support with dell etc they will talk you through the process
DavidConnect With a Mentor PresidentCommented:
Almost all controllers will just automatically start rebuilding.  To be safe, stop the PC in the BIOS screen, make sure it sees the new disk, and knows the RAID is critical.  The new disk should be marked as a hot spare.

You will end up with configuration exactly before this happened.   I.e, if you had a 500GB RAID5 partitioned into 2 logical drives of 100/300GB, then that is what you will end up with.

Many controllers will rebuild the raid while the O/S is online, so your system will hopefully just come up, but come up slowly.  It is "best practice" to let it rebuild at the BIOS level without booting up win2K3.  This is because it will rebuild faster w/o the O/S trying to read/write.

Remember, another drive failure is 100% data loss, so you want it to rebuild as quickly as possible. that is why it is best not to let it continue to boot windows
russell124Connect With a Mentor Commented:
The behavior of the rebuild is going to vary from controller to controller.  Some major raid vendors (IE 3ware) will NOT start automatically rebuilding when you insert the drive unless it is marked as a hot spare, and you have to tag the drive as a hot spare in admin console.

What type of controller are you using?

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IP4IT StaffAuthor Commented:
Unfortunately it has rurned out that for some reason the 3 Disk RAID 5 server is only configured as RAID 0. I talked to Fujitsu and they say that I will not be able to get the data of the other two disk. I will have to reinstall SBS 2003 R2 and overwrite these disks. This is a terrible situaltion as the clinent has never tested his DAT 72 backups to see if they will restore, for more than 2 years now. I am due to go onsite in the morning. Any tips?

I am in serious trouble here.

meteorelecConnect With a Mentor Commented:
i assume you have tried as many disc repair utilities as you can on the damaged disc?
as u know raid 0 is basically recoverable tho iv seen some guides before on how to recover raid 0 discs such as
but fortunatly iv never had to attempt any of them
good luck
DavidConnect With a Mentor PresidentCommented:

Data recovery firms, with clean rooms obviously are going to be able to try techniques that involve replacing hardware or even opening up the media and replacing drive heads.  Be prepared to spend minimum of $500, but most, if not all, will give you a free quote.

As for disk recovery software (not file system or raid recovery software), they're pretty much all  exactly the same.  They just re-read over and over and over the same blocks.  No magic. Tried one, tried them all.
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