About Diskpart Command
Extending hard drive partitions is usually a risky endeavor, but we have to do that when Windows system drive is full. DiskPart.exe is essentially the text-mode command line equivalent to the Disk Management tool, and enables storage objects such as disks, partitions or volumes configuration and management from a script, remote session, or direct input from a command prompt. We can use Diskpart.exe utility to manage disks and volumes from a command-line interface on both basic disks and dynamic disks. Therefore, when extend volume grayed out in Disk Management, you may consider using Diskpart. In Diskpart, you are most likely to receive the error that DiskPart failed to extend the volume or there is not enough unable free space on specified disk(s) to extend the volume. Why? the truth is some operations DiskPart cannot do due to its restrictions.
Some restrictions on Diskpart:
To avoid Diskpart error such as Diskpart failed to extend the volume, you need to understand the following:
1. The volume must be formatted with the NTFS file system.
2. For Basic volumes, the unallocated space for the extension must be the next contiguous space on the same disk.
3. For Dynamic Volumes, the unallocated space can be any empty area on any Dynamic disk on the system.
4. In server 2003, only the extension of data volumes is supported. System or boot volumes may be blocked from being extended
Diskpart failed to extend volume if the system page file is located on the partition. Move the page file to a partition that we do not want to extend
As mentioned above, there are so many limitations in diskpart command-line utility that you can't extend volume easily, then how to extend volume without receiving the error information "diskpart failed to extend the volume"?
Substitute for Diskpart.exe command
Because of these limitations, usually, Diskpart is unable to extend the volume.l. At this time, third party partition software seems particularly useful. AOMEI Partition Assistant, as a professional disk management tool, can always bring you surprises. For example, it can help you extend system volume without rebooting computer, move volumes to change the location of them, allocated free space from one volume to another just by one-click, etc.
AOMEI Partition Assistant Screenshot
There are many amazing benefits in Partition Assistant, such as resize/move partition, create partition, split patition, merge partitions, allocate free
space, clone disk,copy partition, dynamic disk
Tips: Want to know more functions about it, please refer to the Features of AOMEI Partition Assistant or Free Download to get the workaround for Diskpart failed to extend the volume.
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