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HP Storage array 642 controller question

The HP array is split between two servers, 7 drive slots to each controller. We are replacing 6 of the current 72GB drives (one of which has failed) on controller 1 in server #1 with 4 300GB drives. There are enough slots on the second controller on server #2 for me to install the4x300 disks, carve a large drive and move the data over from server #1's failing array.
My question is, can I build the new LUN/drive config on the second controller on server #2 then remove the 72GB drives on controller 1 in server #1, move the 4x300GB drives over to controller 1 and have the new large logical drive appear on server #1? Will the array/controller #1 see the new drives as a carved LUN or will it have to be reconfigured?  
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Elessar1
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Elessar1
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andyalderSaggar makers bottom knockerCommented:
If the question is can you move an array plus the logical disks on it from a Smart Array Controller to another Smart Array Controller then in general you can but it depends what arrays are already on the server that the disks are being moved to. If there are no current disks on the destination controller then there's never a problem; if there is an array currently on the destination server/controller you may end up with two "Array As", normally the controller can cope with that and assignes one as "Array B" but it's not guaranteed to work in every circumstance.

It's advised to have the same level of firmware on both controllers before starting the move.
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gheistCommented:
You can add bigger drive in place of redundant smaller drive, rebuild adday, when all drives are big after lot of rebuilds you can resize array and resize NTFS after reboot with e.g knoppix or some unknown to me commercial NTFS resizer.
Basically you run ACU web interface to properly completely rebuild array after each disk change.
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Elessar1Author Commented:
andyalder,

the controllers for the array are in two servers. They probably have the same firmware but I'll check it. There is an array of 72GB drives on controller #1 (server#1) that needs to be replaced with the new disks, If I build the new array on server#2 (controller 32) I can then delete the 72GB drives array. Does ACU move the config from one controller to the other or will it "see" the drives and the accompanying config once they are moved? There are other drives on the #1 controller that are mirrored: 2x72GB for C: and 2x72GB for drive F:. The other drives constitute the array to be replaced (logical drive D:)  
¿¿ screen shot of array config
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andyalderSaggar makers bottom knockerCommented:
The controller reads the configuration off the disks, The disks are currently called Array B, you should get away with moving them to the other controller but it's easiest if there is currently no Array B on that controller.

I'd recommend fixing it first though, which will require a vreboot to take it out of interim recovery mode, then replacing the failed disk with it powered on. A full backup is essential since you've got no parity at the moment.
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Elessar1Author Commented:
gheist,

replace one drive, rebuild array, run resize utility, replace another drive, rebuild array again, resize again, etc., until all 6 72GB drives have been removed and replaced by the 4 72GB drives? How much time are we looking at for this method? The array

I'm looking for the safest, simplest way to accomplish this with minimal downtime.
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Elessar1Author Commented:
the client didn't purchase a replacement 72GB drive, only the 4 new 300GB drives and I don't think they want to spend their limited funds on a throwaway. I have complete back ups of the data and will run another before the replacement. How about I remove the 72GB drives, delete Array B, install the 300GB drives, create new LUN  using the 4 new drives and then restore from backup? I didn't install the array initially and it's been awhile since I worked on this stuff. Do you know what kind of time it would take to initialize the new array? The restore time I can estimate. I've got to fit this operation into their routine and they have people who work at all hours so the maintenance window can't be too long.
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andyalderSaggar makers bottom knockerCommented:
Seems that's your easiest option, Swapping one by one won't work as you've only got 4 new disks. Initialization is a background task so it takes no time at all.
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