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тАО12-11-2002 08:05 AM
тАО12-11-2002 08:05 AM
Pulling a drive out of an array
Currently the 3 18GB's are in 1 array.
All drives are at RAID 0 in that array (Migrated from RAID 5 so there is 18GB of unused space.
There are 2 logical drives in the array.
Logical Drive 1 is 18GB and consists of the NT OS.
Logical Drive 2 is 18GB an consists of nothing. (Unpartitioned in NT)
And of course, the 18GB of space not allocated in the array.
Basically, using the Compaq Array Util, I need to remove the 3rd 18GB drive from the array and make the entire array mirrored (RAID 1). How do I do this and guarantee that data is not lost. I'm not 100% sure that using the util to just remove the 3rd drive from the array will not screw up my OS.
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тАО12-11-2002 09:32 AM
тАО12-11-2002 09:32 AM
Re: Pulling a drive out of an array
With each drive in RAID0, there is no problem removing the third unpartitioned drive.
Of course, it's always a good idea to have a recent backup handy if something unforseen happens.
At this point the OS doesn't even acknowledge that third drive. Removing it shouldn't be a problem.
Sincerely,
Janine Bertolo
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тАО12-11-2002 09:40 AM
тАО12-11-2002 09:40 AM
Re: Pulling a drive out of an array
http://www.pcguide.com/ref/hdd/perf/raid/levels/singleLevel0-c.html
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тАО12-11-2002 11:14 AM
тАО12-11-2002 11:14 AM
Re: Pulling a drive out of an array
I presumed you have three arrays off the controller - A, B, and C - each one in RAID0.
If this is the case you can remove the last one.
If you have RAID0 striped across all three drives, then you cannot remove one without affecting the others.
Janine
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тАО12-11-2002 11:20 AM
тАО12-11-2002 11:20 AM
Re: Pulling a drive out of an array
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тАО12-11-2002 01:40 PM
тАО12-11-2002 01:40 PM
Re: Pulling a drive out of an array
Yes, unfortunately, in that configuration you cannot remove a hard drive without affecting the rest of the logical drives in the array.
If your aim is to remove one physical hard drive for use elsewhere, you can only accomplish that by destroying the array, reinstalling the OS and restoring any other data from backup.
Sincerely,
Janine Bertolo
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тАО12-12-2002 02:58 AM
тАО12-12-2002 02:58 AM
Re: Pulling a drive out of an array
Raid 0 (striping) puts the data blocks 1 by one on different drives:
disk 1: block 1,4,7,10....
disk 2: block 2,5,8,11...
disk 3: block 3,6,9,12....
The logical drives you have are spread across the disks.
So imagine what happens when you remove one disk. No data is available anymore. Since the NT-OS is on it, you can not just move the data temporaly.
So in your case you should install NT again without the 18GB disk(s).
Goodluck
Donald