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Logical drive extension in Windows 2000 (RAID5)

Posted on 2003-10-29
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Last Modified: 2010-08-05
Compaq SMART 5300 controller with 3 existing disks in RAID 5 config.
Configured in one array and one logical drive.
Now I want to expand the existing drive with one more disk, by using "Logical drive extension"

Note: The windows operating system is NOT stored on this logical drive. This drive is only for data storage.

The Compaq ACU program has a function for doing this, but the BIG question is,
is this "logical drive extension" supported by the Windows 2000 Server operating system ?

This is what the ACU program says about the operation in the help text

"...
The following screens allow you to perform logical drive extension <HELP_definitions.htm>. This will allow you to increase capacity of an existing logical drive
 Warning: Logical drive extension is not supported by all operating systems. Only extend logical drives <HELP_definitions.htm> that are used with an operating system that supports extensions. Check your operating system documentation or contact your operating system vendor before extending logical drives.
Your first option will be to select the logical drive you want to extend from the choices listed.
The next option is to select the new size for the extended logical drive.
Logical Drive Size
Enter a larger logical drive size in the MB value field.
When you save the extended logical drive it will be restructured so that its data is preserved.
You can make the extended space of the logical drive available for use by your operating system by one of the following methods:
•      Create a new partition in the extended space of the logical drive by using the operating system partitioning software.
•      Increase the size of existing partition(s) in the extended logical drive by using the operating system partition software or using third party partitioning tools
......"


Config:
Win 2000 Server SP4. (2x 18GB RAID-1. On separate raid controller and partition)
Compaq Proliant 370 G2
SMART-5300 Controller Firmware 3.40 Rev A
RAID-5 3x72GB SCSI + 1 72GB added  - this controller for datastorage.
HP Array Configuration Utility (ACU) v6.40.11.0
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Question by:janostlund
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svenkarlsen earned 750 total points
ID: 9651322
regardless: take a full backup before any attempts to add the disk at any level.

assuming you only have one partition on the RAID disk (as seen from Win2000 perspektive)

Before you start at the RAID controller level, use Disk Manager to verify that the RAID Disk is configured as a dynamic disk, - if not, just right-click the left-most column and select "Upgrade to dynamic disk".

Next, clean-up the disk  (Disk properties, clean-up, defrag if required)

Now add the drive to the RAID controller.

When it has finished the 'refurnishing' on your disks and you get an error-free report on the update, Disk Manager should show the result as a section of unallocated disk space. Right-click the original drive, select 'Extend Volume'  and follow the instructions.

Comment: I have only done this about 10-15 times using IBM RAID controllers, and it has made me sweat each time, but it has worked every time.
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Author Comment

by:janostlund
ID: 9823689
to svenkarlsen

Thanks for you reply.

Got the answer from Hp that the newest Array config Utyility will support this extension on the fly.
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