Please help!!! NT to W2K backout plan......

[mxbrett]

Hi there,

We're in the process of upgrading servers from NT4 to W2K.
We are currently running some tests on dev boxes.

Hardware spec is as follows:

Comapq Proliant 3000. Samrt array controiller = 2DH
2 partitions - (2 disks as Raid1 set = OS, 3 disks as RAID5 set = data, 1 global hot spare shared between partitions.)

We want to have a backout plan should the rebuild process not go according to plan.
We powered down the server, removed one of the OS drives (this is for backout - so we can boot back into an NT4 OS). Power the server back on. The global hot spare then re-syncs with the existing drive.
We rebuilt the OS with W2K. All works fine (except for some errors at boot time, complaining that the removed disk had failed, as expected.)

To test our backout plan, we removed the rebuilt disk & reinserted the old NT4.0 disk. Rebooted the server but it fails when trying to load the OS

Any ideas?
Does one of the disks within a RAID1 set become the "Active" disk or boot disk?

Any help would be great.

Thanks,

Mise

 

[BrianH1]

Take a look at

http://support.microsoft.com/default.aspx?scid=kb;en-us;Q167045

This explains some of the main causes and solutions to not being able to boot from a mirror.

 

[jasonboche]

Yes. You should have yanked the hot spare too or used ACU to disable it for a while.

For your test, remove disk1 and set it aside. Use disk0 to do your upgrade. If you want to back out, power down, remove disk0 and replace it with disk1 in the disk0 slot. Boot up. Disk0 will be active.

The next disk you put in the disk1 slot will get wiped and the hardware will re-mirror it with disk0.

Don't forget to put your online spare back in.

Jas

 

[sentmemail]

i have done the same, but the HDD does not re-mirror !
any help?
thanks alot