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I'm using Fujitsu PRIMERGY RX200 S6 with RAID controller RAID Ctrl SAS 6G 5/6 512MB (D2616)

I've migrated RAID 1 (2 discs) to RAID 5 (4 discs) without any problems and on the fly without restarting the server. The new logical disk has now expanded in size and I see it from RAID manager software. From Windows Disk Manager it is still seen as old smaller size.

I thought I can resize the partition from Windows once migration to RAID 5 is finished but Windows doesn't see it. I didn't restart the server yet.

Is it possible to expand the disk size without destroying the data?

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You have to do a rescan after a resize for Windows to see the new disk size.

In diskmgmt.msc click Action and select Rescan Disks

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After that you can extend the partition as normal.

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