能否增加虚拟机（VM）挂载磁盘数量？Standard_d4s_v3节点磁盘上限可提升吗？

Hey there! Let's tackle your two questions one by one:

1. Can the number of disks a VM can mount be increased? #

It depends entirely on your VM's instance SKU (the specific VM type you're using). Different VM series and sizes come with predefined maximum limits for attached data disks:

• For some lower-tier or older instance types, the limit is fixed and can't be raised.
• For newer or higher-spec instances, you might already be hitting the hardware-imposed maximum, so no further increase is possible.
• The only reliable way to get more attached disks is to upgrade to a VM SKU that natively supports a higher number of data disks.

2. Can the 8-disk limit for Standard_d4s_v3 nodes be lifted? #

Unfortunately, no. The Standard_d4s_v3 is part of the Dsv3 VM series, and this specific instance size has a hard-coded maximum of 8 data disks built into its underlying hardware configuration. This isn't a configurable setting—you can't override or raise this limit for an existing Standard_d4s_v3 VM.

If you need to attach more than 8 disks, your best options are:

• Resize your VM to a larger size within the Dsv3 series (like Standard_d8s_v3, which supports up to 16 data disks)
• Switch to a different VM series that offers higher disk attachment limits (such as certain instances in the Esv3 or M-series)

内容的提问来源于stack exchange，提问作者Zuriar