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I can't expand my Simple Volume Disk0 for C:\ Volume.

This is Server 2016 Virtual Machine, Unallocated space of 300GB was added to the VM Disk, as you can see in the screenshot. I haven't the option "Extend Volume" on the C-drive. On the D-drive the option "Extend Volume" is working fine.

Any suggestions please?

C-drive extend grey out

Disk overview

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    Is there a reason you are using Dynamic disks? Many disk utilities will not move those. Commented Jul 16, 2023 at 15:55
  • Any reason you are still on Server 2016? It was EOL 1/2022. Commented Jul 17, 2023 at 18:25
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    @java-addict301 win2016 extended support goes to Jan 12, 2027. So there's no new work, only security fixes. Commented Jul 17, 2023 at 22:52
  • @Criggie, how many will subscribe for extended support? 5-10%... Commented Jul 18, 2023 at 19:11
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    @RomeoNinov I may have used the wrong name, sorry. Win2016 still gets security fixes until Jan2027 and support after that date would be chargeable support. Commented Jul 18, 2023 at 22:13

2 Answers 2

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You can only extend a volume into adjacent free space. The C: volume has no adjacent free space. The free space is adjacent to the D: volume.

You could use a third party utility (take your pick) to make the changes needed to extend the C: volume.

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    That's not exactly true for Dynamic disks – LDM can concatenate several chunks into a single partition, like Linux LVM. Commented Jul 17, 2023 at 13:25
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The reason is because the free space is not exactly after the volume you want to extend. If you can move the volume D to be on the right of disk and then extend volume C

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