How to stretch RAID 5 C partition

Anthony Mitchell
Anthony Mitchell used Ask the Experts™
on
I have an issue of requiring more space on my primary partition.  I have a Dell 410T, 4 x 300GB 10K RPM SAS 6Gbps 2.5in Hot=Plug Hard Drive, PERC H700 Adapter RAID Controller 512 MB, RAID 5, Total of 837 GB 40 GB Primary partition on C: and 794 GB on D (525 GB Free). I would like to shrink D and expand C by 60 GB.  The server is running preinstalled software.  Is there a way I can do this without destroying the existing disk structure?
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Top Expert 2016

Commented:
you have to use 3rd party disk partitioning tools. to shrink D drive and then move the start position to the right to make unpartitioned space between C and D then you can extend C

Author

Commented:
Yes understand and have not located a product that creates contiguous space.  All seems to add the new space to the end of D but does not allow moving the space to the start of D.
Dr. KlahnPrincipal Software Engineer

Commented:
Please show us a screenshot of Disk Management showing the drive in question so that we can advise you accurately.

Under some versions of Server this can be done with the Microsoft provided software.  Please let us know which version of Server is in use.
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Author

Commented:
Server is 2012 R2.  Screenshot attached
Drive-Screen-Shot.png
Principal Software Engineer
Commented:
OK.  David is correct, in this configuration the operation cannot be done with the Microsoft "shrink volume" operation.  You need free space before the D partition, not after it.

Have a look at this page, which deals with a similar situation.

https://www.hdd-tool.com/windows-server-2012/shrink-volume-partition.html

Before attempting anything, do a full image backup of the drive.  If anything goes wrong you must be able to get back to where you are now and shuffling partitions around on a server is high-risk.  Quiesce the server as much as possible before attempting the resize, shut down everything possible, and be sure to reboot afterward so that anything that thought it knew where something was is forced to re-evaluate that.

On a Server system partition at least 100 GB is prudent, 150 would be better and 200 better yet.  You don't want to be re-doing this every six months as space runs out, nor do you want to be garbage collecting the drive every six months trying to avoid another partition shuffle.

Author

Commented:
Will evaluate and try this method.  Thanks for the info.

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