您是否想增加 PC 上的卷或分区的大小，但发现Windows 磁盘管理中的“(Windows Disk Management)扩展(Extend)卷”选项灰显？了解(Learn)为什么会发生这种情况以及您可以采取哪些措施来解决此问题。
Microsoft Windows中的磁盘管理(Disk Management)控制台允许您轻松扩展 PC 上的卷或分区的大小。但是，如果“扩展音量”选项显示为灰色怎么办？
至于为什么会发生这种情况，有几个可能的原因。继续阅读以了解如何修复Windows 10和 11 中的扩展音量选项灰显问题。
为什么“扩展(Extend)音量”选项显示(” Option Appears)为灰色
由于以下原因，磁盘管理工具中
硬盘或(Disk Management)SSD的“扩展(Extend)卷”选项可能会显示为灰色：
- 磁盘上没有未分配的空间。
- 未分配的磁盘空间并不直接位于要扩展的卷的右侧。
- 您要扩展的驱动器分区的格式不受支持 - NTFS 或ReFS。
- 该磁盘使用较旧的MBR（主引导记录(Master Boot Record)）分区方案。
大多数上述问题是由于磁盘管理(Disk Management)的限制而发生的。如果以下故障排除提示听起来太复杂，您可能想跳到讨论使用第三方分区工具扩展分区大小的部分。
1.创建连续的(Create Contiguous)未分配空间(Space)
您在计算机的磁盘管理(Disk Management)控制台中看到“扩展(Extend)卷”灰显选项的最常见原因是硬盘或SSD上没有“未分配空间” 。那是您尚未使用文件系统格式化的存储。
即使磁盘管理的磁盘图形表示显示未分配存储，“扩展(Extend)卷”灰显选项将保持灰显，除非空间紧邻您要扩展的卷的右侧。
例如，假设您的计算机有两个分区，分别是 C 和 D 驱动器号。如果要扩展 C 盘，则必须删除 D 盘以创建未分配的驱动器空间。在 D 驱动器上使用磁盘管理的“缩小卷”选项将不起作用，因为 D 驱动器将充当 C 驱动器和由此产生的未分配空间之间的屏障。
要删除分区并创建未分配空间：
- 将分区内的所有数据复制(Copy)到备用卷或外部磁盘。
- 右键单击磁盘管理(Disk Management)中的卷或分区，然后选择删除(Delete)卷。
- 选择是确认。
然后该分区将显示为未分配空间。然后，您可以毫无问题地将卷扩展到未分配空间的左侧。
2.删除恢复分区
在要扩展的卷和任何未分配的空间之间存在恢复分区可能是导致磁盘管理中的“(Disk Management)扩展(Extend)卷”选项显示为灰色的另一个原因。
由于恢复分区可以帮助您在出现问题时恢复您的计算机，因此我们建议您不要删除它。但如果您想继续，您可以使用DiskPart命令行工具通过Windows PowerShell或命令提示符(Command Prompt)控制台删除分区。
但是，请确保创建可启动的 Windows 恢复 USB 或光盘(create a bootable Windows recovery USB or disc)，以保护您的计算机免受操作系统损坏和数据丢失。
- 右键单击(Right-click)开始(Start)按钮并选择Windows PowerShell ( Admin )。或者，在“开始(Start)”菜单中键入 cmd.exe，然后选择“以管理员身份
运行” 。(Run)
- 在 UAC 弹出窗口中选择是。
- 依次运行以下命令。
- diskpart：加载DiskPart实用程序。
- 列出磁盘：列出计算机上的所有磁盘。
- 选择磁盘[编号]：选择要擦除的恢复分区所在的磁盘，将[编号]替换为磁盘的磁盘编号。
- list partition：列出驱动器上的所有磁盘分区。
- select partition [number]：选择恢复分区，将 [number] 替换为其分区号。
- 删除分区覆盖：删除(Delete)恢复分区。
3.使用兼容的格式
磁盘管理(Disk Management)仅允许您以NTFS格式（如果您的Windows版本支持，则为ReFS格式）扩展分区。(ReFS)这不是系统分区的问题，因为Windows只在NTFS分区上运行。
但是，如果您要扩展逻辑分区，它可能采用不受支持的格式，例如FAT32。您可以使用磁盘管理(Disk Management)来格式化NTFS中的卷，但这会擦除其上的所有数据。因此，请务必先备份分区内的所有内容。
- 右键单击(Right-click)磁盘管理(Disk Management)中的分区并选择Format。
- (Set File System)在格式(Format)对话框
中将文件系统设置为 NTFS 。
- 选择确定。
您现在应该能够扩展卷，假设驱动器右侧有未分配的空间。
4. 将 MBR 转换为 GPT 磁盘
如果您尝试在使用MBR（主引导记录）分区方案(MBR (Master Boot Record) partition scheme)的磁盘上扩展分区或卷，您可能正在处理与MBR磁盘相关的 2TB 阈值。要解决此问题，您必须将HDD或SSD从MBR转换为GPT。
- 在磁盘管理(Disk Management)中右键单击磁盘，然后选择属性。
- 切换到卷选项卡。
- 检查分区(Partition)样式旁边的字段以确定它是使用GPT还是MBR分区方案。
如果磁盘位于MBR中，我们建议您按照我们关于将磁盘从 MBR 转换为 GPT 的指南进行操作，而无需重新安装 Windows以获得进一步说明。
5.使用第三方分区管理器(Partition Manager)
与磁盘管理不同，Windows 的顶级第三方磁盘分区工具(top third-party disk partitioning tools for Windows)使用起来要好得多，并提供多种方法来以最小的麻烦增加分区大小。例如，傲梅分区助手标准(AOMEI Partition Assistant Standard)是一个免费实用程序，允许您通过将卷与其他分区和未分配存储合并来扩展卷，即使它们不连续。
AOMEI Partition Assistant Standard还允许您将可用空间从一个分区分配到另一个分区，以(AOMEI Partition Assistant Standard)磁盘管理(Disk Management)通常支持的格式扩展驱动器，并在需要时方便地将磁盘从MBR转换为 GPT。以下是傲梅(AOMEI)中的几个分区操作，应该会派上用场。
- 调整分区大小(Resize Partition)：选择一个卷并使用调整分区大小(Resize Partition)选项来增加分区大小，使用紧靠左侧或右侧的未分配空间。
- 合并分区(Merge Partition)：在驱动器上的任何位置合并具有未分配空间的分区。您还可以使用此选项合并两个分区。
- 分配(Allocate)可用空间：将(Allocate)可用空间从一个分区直接分配到另一个驱动器。
- 转换(Convert)为GPT：右键单击磁盘并选择转换(Convert)为GPT。不过，您必须手动从 Legacy BIOS 切换到 UEFI(Legacy BIOS to UEFI manually)。
但是，在使用第三方分区工具之前，我们建议您在继续之前备份磁盘上的数据。(back up the data on your disk)这使您可以在出现问题时恢复数据。
最好避免(Best)使用磁盘管理(Using Disk Management)
如您所见，如果“扩展卷”选项在“磁盘管理(Disk Management)”中显示为灰色，除非您使用第三方分区工具，否则修复它可能会很麻烦。后一种选择不仅在调整卷大小方面更好，而且您在删除和移动分区上花费的时间也更少。
“Extend Volume” Option Grayed Out in Windows? Try These 5 Fixes
Do you want to increase thе size of a volume or partition on уour PC but find the “Extend Volume” оption in Wіndows Disk Managemеnt grayed out? Learn whу that happens and what you can do to fix the issue.
The Disk Management console in Microsoft Windows allows you to easily extend the size of a volume or partition on your PC. But what if the “Extend Volume” option appears grayed out?
There are a few possible causes as to why that happens. Read on to figure out how to fix the extend volume option grayed-out issue in Windows 10 and 11.
Why the “Extend Volume” Option Appears Grayed Out
The “Extend Volume” option for a hard drive or SSD in the Disk Management tool can appear grayed out due to the following reasons:
- There is no unallocated space on the disk.
- The unallocated disk space is not directly to the right of the volume you want to extend.
- The drive partition you want to extend is not in a supported format—NTFS or ReFS.
- The disk uses the older MBR (Master Boot Record) partitioning scheme.
Most of the above problems occur due to limitations with Disk Management. If the following troubleshooting tips sound too complicated, you may want to skip to the section that talks about using a third-party partitioning tool to extend the size of a partition instead.
1. Create Contiguous Unallocated Space
The most common reason you see an “Extend Volume” grayed-out option in the Disk Management console on your computer is when there’s no “unallocated space” on your hard disk or SSD. That’s storage you’ve yet to format with a file system.
Even if Disk Management’s graphical representation of the disk indicates unallocated storage, the “Extend Volume” grayed out option will remain grayed out unless the space is immediately to the right of the volume you want to extend.
For example, let’s assume your computer has two partitions with the C and D drive letters. If you want to extend C drive, you must delete D drive to create unallocated drive space. Using Disk Management’s “Shrink Volume” option on D drive won’t work because D drive will act as a barrier between C drive and the resulting unallocated space.
To delete a partition and create unallocated space:
- Copy any data within the partition to an alternative volume or external disk.
- Right-click the volume or partition in Disk Management and select Delete Volume.
- Select Yes to confirm.
The partition will then show up as unallocated space. You can then extend the volume to the left of the unallocated space without issue.
2. Delete the Recovery Partition
The presence of a recovery partition between the volume you want to extend and any unallocated space can be another reason that causes the “Extend Volume” option in Disk Management to appear grayed out.
Since the recovery partition helps you restore your computer in case something goes wrong, we advise against deleting it. But if you want to go ahead, you can delete the partition using the DiskPart command-line tool via Windows PowerShell or the Command Prompt console.
However, make sure to create a bootable Windows recovery USB or disc instead to protect your computer against operating system corruption and data loss.
- Right-click the Start button and select Windows PowerShell (Admin). Or, type cmd.exe into the Start menu and select Run as administrator.
- Select Yes on the UAC pop-up.
- Run the following commands in sequence.
- diskpart: Load the DiskPart utility.
- list disk: List all disks on your computer.
- select disk [number]: Select the disk with the recovery partition you want to erase, replacing [number] with the disk number of the disk.
- list partition: List all disk partitions on the drive.
- select partition [number]: Select the recovery partition, replacing [number] with its partition number.
- delete partition override: Delete the recovery partition.
3. Use a Compatible Format
Disk Management only allows you to extend partitions in the NTFS format (or the ReFS format if your Windows edition supports it). That isn’t an issue with the system partition because Windows only runs on NTFS partitions.
However, if you’re extending a logical partition, it could be in an unsupported format like FAT32. You can use Disk Management to format the volume in NTFS, but that will erase all data on it. So, make sure to back up everything within the partition before you ahead.
- Right-click the partition in Disk Management and select Format.
- Set File System to NTFS on the Format dialog.
- Select OK.
You should now be able to extend the volume, assuming that there’s unallocated space to the right of the drive.
4. Convert MBR to GPT Disk
If you’re attempting to extend a partition or volume on a disk that uses the MBR (Master Boot Record) partition scheme, you might be dealing with the 2TB threshold associated with MBR disks. To fix the problem, you must convert the HDD or SSD from MBR to GPT.
- Right-click the disk in Disk Management and select Properties.
- Switch to the Volumes tab.
- Check the field next to Partition style to determine if it uses the GPT or the MBR partition scheme.
If the disk is in MBR, we recommend that you follow our guide about converting a disk from MBR to GPT without having to reinstall Windows for further instructions.
5. Use Third-Party Partition Manager
Unlike Disk Management, top third-party disk partitioning tools for Windows are considerably better to use and offer multiple approaches to increasing partition sizes with minimum hassle. For example, the AOMEI Partition Assistant Standard is a free utility that allows you to extend a volume by merging it with other partitions and unallocated storage even if they aren’t contiguous.
AOMEI Partition Assistant Standard also lets you allocate free space from one partition to another, extend drives in formats that Disk Management usually supports, and conveniently convert disks from MBR to GPT if needed. Here are several partition operations in AOMEI that should come in handy.
- Resize Partition: Select a volume and use the Resize Partition option to increase the partition size using unallocated space immediately to the left or right.
- Merge Partition: Merge a partition with unallocated space anywhere on the drive. You can also use this option to merge two partitions.
- Allocate Free Space: Allocate free space from a partition directly to another drive.
- Convert to GPT: Right-click a disk and pick the Convert to GPT. You will have to switch from Legacy BIOS to UEFI manually, though.
However, before using a third-party partitioning tool, we recommend you back up the data on your disk before going ahead. That allows you to restore your data in case something goes wrong.
It’s Best to Avoid Using Disk Management
As you just saw, if the “Extend Volume” option appears grayed out in Disk Management, fixing that can be a hassle unless you use a third-party partitioning tool. Not only is the latter option better at resizing volumes but you also spend less time deleting and moving partitions.
