软 raid 后的硬盘读写状况，仅在资源监视器开启后在任务管理器中可见

[xuangoer666]

Windows Server 2025 24H2

如果不开启资源监视器，任务管理器中硬盘各项参数均为 0 ，仅开启资源监视器后可正常显示

bug or feature ？

[ar16]

同问，winserver 25 datacenter 24H2
没做 raid ，全是直连的硬盘和 op 一样症状

[vibbow]

这是 feature

NOTE The Disk counter has been removed from the Performance tab in Windows Server 2012. This is because there is significant performance impact to collect Disk metrics on a Server due to the overhead Task Manager may cause in querying each Disk IO for each process/thread on individual disk.

[ar16]

@vibbow 感谢，顺藤摸瓜查到了怎么开启：
prints: Both Logical and Physical Disk Performance counters on this system are automatically enabled on demand. For legacy applications using IOCTL_DISK_PERFORMANCE to retrieve raw counters, you can use -Y or -N to forcibly enable or disable. No restart is required. –
David Balažic
CommentedFeb 1, 2023 at 9:56

[ar16]

粘漏了，补充：diskperf -Y
https://superuser.com/questions/1444211/no-disk-info-in-task-manager

[PrinceofInj]

这个有些年头了，微软当年的说法是加上之后性能会有问题。所以一直都是在性能监视器里面查看。但是那个地方有个坑爹的之处就是读写速度是个平均值，没有瞬时值。

[gvdlmjwje]

我给几台虚拟机开了 diskperf -y ，这个性能影响大吗