Member Avatar for ggeoff

Hi

I have a Raid 1 setup which had two drives a 250GB and a 500GB. I have replaced the 250GB drive (which had not failed) with a 500GB drive. The Raid now shows just a 250GB. What do I have to do to make use of the 500GB?

The Raid 1 is managed by the Intel Matrix Storage Console 6.0 on a Dell 9200. The Raid is in addition to the programs and Windows XP Pro OS drive.

Edited by pritaeas because: Moved.
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Short summary: replaced a 250GB mirror member with a 500GB disk but the RAID still presents 250GB. That means the RAID logical volume was created at 250GB and the controller/metadata has stayed at that size. correctly flagged the safe, general route (backup and rebuild). Below are practical checks and options to use the extra space without risking data.

  1. Backup first. Make a full image (not just copied files) of the array to an external drive. Any operation that touches RAID metadata carries risk.

  2. Verify where the limitation sits:

    • Look in the Intel Matrix Storage Console and in the RAID BIOS/firmware during boot to see what the controller reports as the logical disk size.
    • If the controller shows 500GB but Windows shows 250GB, the extra space is unpartitioned and can be used by creating a new partition or by expanding the NTFS partition with a partitioning tool.
    • If the controller still reports 250GB, the array was sized to the smaller drive and the controller must be reconfigured to change it.

  3. If the controller supports online capacity expansion/reconfigure (some Intel firmware versions do), follow that route in the Intel utility. If it does not, or you are unsure, the safe sequence is:

    • Image/backup the array.
    • Delete and recreate the RAID 1 using the two 500GB drives (this will create a 500GB logical disk).
    • Restore the image to the new array.

  4. If the controller already exposes the full 500GB to the OS but XP only sees 250GB, use a reliable partitioning tool (bootable live tool or Windows partition manager that supports XP/NTFS) to expand or add a partition. Note: Windows XP Disk Management is limited; third-party tools are commonly used here.

Cautions and notes: confirm Intel Matrix/Intel RST version compatibility with your Dell 9200 and Windows XP before updating firmware/drivers. Check that both drives use the same sector size/alignment. If unsure at any step, keep the backup and consider rebuilding the array so you regain the full 500GB without risking the data.

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Member Avatar for rubberman

The size seen is the file system size, which was set to 250GB originally as that was the size of the smaller drive. You need to go into the disc manager tool and expand the file system. On linux you would do this with the command resize2fs for ext2/3/4 file systems, or if it is an NTFS file system on Linux, ntfsresize.

Member Avatar for ggeoff

thanks Rubberman but the OS is Windows XP. If I right click on the raid there is no option to increase the file size. There are three options: Mark partition as active, change drive letter and paths, and format.

Member Avatar for rubberman

Ok. Then if you cannot resize the array, you will need to back up your data, and re-configure / re-format the array to the size you need. Others here may have better advice. I try to stay away from Windows as much as possible, especially with regard to this sort of thing.

Edited by rubberman
Member Avatar for ggeoff

Thanks Rubberman. I have made other enquiries trying to get information from Intel without any luck. I'll take your advice.

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