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How to clone a Raid 5 system

Hi,

Currently, we have a Compaq proliant that is running 3x 18gig SCSI drives in Hardware Raid 5. Weve now exceeded the hard drive space on these drives, and need to decomission them. Weve got 3x 147gig drives to take over, but unsure how to mirror the contents across.

So far, ive tried the following,

Leaving the exsisting raid 5 array in tact, and connecting up the additional 3x147gig drives, then creating a new raid 5 array for these 3 drives. Then I loaded up Symantec Ghost, and cloned the contents from the old aray to the new aray.
Then I deleted the old aray from the hardware raid controller, and left the array of the 147gig drives in tact, but the system wouldnt boot from them.

Whats the best way to do this?
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mdixie
Asked:
mdixie
1 Solution
 
Michael PfisterCommented:
Use a disk partitioning tool like fdisk to see if the boot partion on the new RAID is activated (needs an "A" to the boot partition). If not, use fdisk to mark it "active".
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Michael PfisterCommented:
You need to boot from a DOS disk to do that, i.e. get a Windows 98 start disk.
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mdixieAuthor Commented:
cheers for that.. I will give that a try Tuesday evening when I bring the server down for maintenance, and will reward you with the points if its successful.
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joedoe58Commented:
You only have to make a backup of your data remove your disks install OS and backup program and then reinstall you backup. My question though is if this is a DC and if so if it is the only DC in the domain?
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mdixieAuthor Commented:
Yeah, it is the PDC. And the only domain controller for the domain. Its also the exchange server, and why the company has decided to upgrade the hard drives, caus the server has now officially run out of disk space.
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bilbusCommented:
why not just put 1 147 gm into the array. reconstruct. Put next one in, reconstruct. Add file drive, reconstruct. Then extend the array

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mdixieAuthor Commented:
Ok, I recloned the Raid 5 array, and loaded up Fdisk, to find that the drive was already set as active. So then I booted the PC with all 6 drives loaded, and checked for file consistancy between the old raid 5 and new raid 5 array, and all the data coppied across fine.

So what I did was, restarted the PC and booted off the win2k cd, and as its trying to load, it gave me a error message similar to "cannot access boot record". And then it loaded the disc, and displayed the following error message on the blue screen "I/0 Error: 00080000". I left it for a few minutes, and it got past the error, so I selected the repair option in console mode. But it wouldnt accept my administrator password.

Does this sound like it could be a faulty hard drive causing the problem ?
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Michael PfisterCommented:
If it would be a faulty hardware you should have problems during the clone process...

If your disk shelf can hold all disk, just leave the 3 x 18 GB in it and add the 3 x 147 as free space.

If your old drive is partitioned in a "system drive" and a "data drive", its quite easy:

- Shut down all services like Exchange, SQL, etc.
- Copy the entire data partition with all data/databases _including_ NTFS permissions (use scopy or robocopy!!) to the new drive.
- Swap drive letters so the new data partition now has the drive letter of the old one and reboot.

You now have a huge data partition. If the entire migration worked fine, delete the old data partition on the 3x 18 Gb array and expand the system partition to 36 GB with "diskpart" (see http://support.microsoft.com/default.aspx?scid=kb;en-us;325590).





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Michael PfisterCommented:
Hi mdixie, any news on that?
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