Expand OS Partition on PERC with RAID 5

I have a PowerEdge T620 with a PERC H710 with 4 physical disks (and 1 hot spare) in a RAID 5 configuration.

See attached screen-shots for disk layout.

I'm running out of space on the C: drive, however (thankfully) the data on E: is not needed.  I'm guessing since it's adjacent to C:, this makes it easier to re-size the C: drive.  Note that the data on D: is important, and can't be lost.  I do have backups, but would prefer not to "need" them.

What's the proper way to take the space on the E: drive and incorporate it into the C: drive?


Brian EliasAsked:
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Mal OsborneAlpha GeekCommented:
Quite simple, from within disk manager, delete partition E:, (Right click, delete volume), then extend partition C:. (right click, extend volume). I have never seen this fail, but a backup is still highly advisable.

Note that because you have multiple RAID virtuals drives using the same physical disks, it is NOT possible to add drives the existing virtual disk. If you wanted to add disks you would either need to reinstall from the beginning, or create a new virtual disk using the new drives.

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Seth SimmonsSr. Systems AdministratorCommented:
Quite simple, from within disk manager, delete partition E:, (Right click, delete volume), then extend partition C:.

1) make sure you either move or backup whatever is on E first (if you want to keep it) before deleting it
2) you need to also delete the extended partition before you can extend C
Why not relocate the applications that consume the space on C: to the E:?

What does the system do? it seems the partitioning of creating the E: drive was not followed with using it

first thing look in c:\windows\temp and see if you can delete old temporary files from there to free up the space.

If the system is not up to date with the microsoft windows, but is set to download and notify, stop windows update ang bits transfer and then look at c:\windows\softwaredistribution download folder to see whether there are updates that have been downloaded and consume space.

If you have WSUS running on this server, the Database and the content can be moved if it is on C: to E: and free up the space.

Trying to resize a partition using diskpart which is what the prior suggest would require a backup, and if you've not done it before, ...

The system needs to be booted by an external .....

Look at the advanced system settings, to see whether the space consumed on C: is the windows paging file, setting a lower limit on the C: partition while creating/adding a larger paging file on the E: may free up the space on the C: partition. note there will not be a significant performance hit since both C and E are on the same set of disks.
Make sure to leave the C: page file around 500 MB as the max.... to avail the system to do a memory dump if needed...
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