adding an extra HD on RAID5

By paul.muchenje ·
what are the specific steps of adding an extra hard disk on a HP Server with RAID 5 running windows server and make it available to windows without loosing data

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What RAID controller

by cmiller5400 In reply to adding an extra HD on RAI ...

Some RAID controllers don't support adding another drive to an existing array without rebuilding the whole thing. Be careful and ALWAYS make sure that you have a full backup before doing anything with the array.

Oh, Did I mention to BACKUP yet???

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Extend HP RAID 5

by Churdoo In reply to adding an extra HD on RAI ...

Adding the capacity at the RAID level is the easy part. What server model is it? If the disks are hot-swap, then you slide in the new disk, and go into the windows based ACU (Array Configuratioin Utility) if the ACU is installed, and EXTEND the RAID 5 to utilize the added disk. If the ACU is not installed, then you can reboot to the ROM-based ACU and Extend the RAID array.

This can be done HOT and the RAID restructuring will run in the background. Disk I/O performance may be degraded while the RAID restructuring is taking place so you want to do this during a period of light activity if possible.

Once the restructuring is complete, you can go into Disk Manager in Windows and RESCAN DISKS and you'll see the added capacity on the RAID 5 disk, although your original NTFS volumes will not automatically be extended into the new capacity.

For making this available to Windows, there are a couple of choices:
1) Create a new volume in the added capacity. This of course you can simply create a new volume in the new empty space, format it and give it a new drive letter.
2) Extend an existing NTFS volume:
2a) If the volume that you want to extend is NOT the system volume, then you can easily EXTEND the non-system volume with DISKPART. I would boot the server in SAFE mode so that nothing is being accessed on the non-system volume and use DISKPART to extend the non-system volume. Reboot to normal mode and you're done.
2b) If the volume that you want to extend IS the system volume, then you have to EXTEND the system volume with a 3rd party utility like Acronis Disk Director, or with DISKPART from a parallel install of Windows, as you cannot EXTEND the Windows system volume that you're booted from.

This are a high-level view, post back more questions or for more detail if necessary.

Oh yeah dummy me ... what CMILLER said ... Make SURE you have a good backup!

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