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Disk Mirroring

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by jhicks 1 view

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We have a customer that had their hard drive on their server fail a couple of weeks ago which left them down for a few days (waiting for a new drive). The owner wanted to go to a mirrored system on his NT4 server. My question is that there are c: and d: partitions on the drive. C: is where NT and the system software resides and D: is where the applications and databases are stored. If we make a mirrored set will we be able to mirror both partitions on the mirrored drive? If so is there anyspecial setup involved or is it just like creating a mirrored set of one partition?

8 replies

by Former member

Yes you can mirror both partitions. Just get two drives, with the other mirroring drive the same or greater in size. Do not partition the second drive. Get into NT and open Disk Adminstrator, select the partitions you want to mirror, holding down the control key, select the second drive and goto the top menu and select 'Fault Tolerance' and 'Establish Mirror'. This is probably the cheapest way to do it.

by aekland

Yes you can mirror both partitions, it is the same as doing one partition. The only problems I have run into is some scsi drivers cause windows to make a slightly larger mirror so that you cannot mirror the entire drive when they are identical and fully use the first drive. It may be best to push for Hardware raid as it performs better and recovers better from failures.

by harmssd

The easiest way to accomplish the mirror of the drive with partitions c & d on it is to install a second hard drive with the same amount of space as the first. Then make a mirror of c:\ on the second drive the same size as the original c:\. Then make a mirror of the original d:\ on the second drive the same size as the original d:\. Fairly easy to do!!

by rnadasky

harmssd@bigfoot.com could not make it easier. He is 100% correct. I do it all the time for our local developers hard drives.

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