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Mirror breaks after initializing using D

By ddewii ·
I had a drive failure on an NT server that was mirrored via Disk Administrator. I broke the mirror, restarted and brought a new disk online. I successfully remirrored the drive and it was healthy once again.

However, my intent was to break the mirror once again and replace the good original drive (4.5GB/5400RPM) with another replacement drive (9.1GB/10000RPM) so I could remirror a second time using identical disks. IT WON'T WORK!!! I've tried six times, reformatted the new drive (twice), used the SCSI utilities to zero fill the drive (twice), changed the SCSI ID from 2 to 0 (1 is my boot disk), but it still won't regenerate a healthy mirror. I thought running a low-level format and letting NT write a new signature on the disk would work, but it doesn't. What else can I do??? I know the disk is good, because I've verified it not only in the SCSI utilities, but also NT. HELLLLLLLLLLLLLLLLP!!!

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Mirror breaks after initializing using D

by -Q-240248 In reply to Mirror breaks after initi ...

Well, first off, if i remember correctly, you don't even partition a drive to be mirrored because the mirroring software takes care of that in Disk Adminstrator, so you can't even establish a mirror with a drive that already has a partition. Wipe them out! Then establish (not reestablish) the mirror.

Second, if you're already doing this, but the mirror stays in a constant 'unhealthy' mode, trhen check your partition sizes Disk Admin created in that it may be reading the geometry incorrectly due to the SCSI controller's settings...

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Mirror breaks after initializing using D

by ddewii In reply to Mirror breaks after initi ...

The question was auto-closed by TechRepublic

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Mirror breaks after initializing using D

by mikeaussie In reply to Mirror breaks after initi ...

I concur with reply 1. If you mirror a 4.5g drive to a 9g you will lose half of the larger drive. The target drive must be free of any partition to establish a mirror. The only way I am aware of that will give the larger drive in full (apart from reinstall) is to connect both drives to a box with NT on already. Use Disk Administrator to format the large drive out, best sector size is not less than 1024b/sector, Copy the original 4.5g drive in full to the new 9.0g drive, transfer this to the server, boot and establish mirror with the second 9.0g

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Mirror breaks after initializing using D

by ddewii In reply to Mirror breaks after initi ...

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Mirror breaks after initializing using D

by ddewii In reply to Mirror breaks after initi ...

This question was auto closed due to inactivity

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