c++ - 获取磁盘转速示例代码

Question

我不太擅长 VC++，但有没有人有示例代码来获取计算机中磁盘的转速。我一直致力于检测 SSD 驱动器，整天研究的一个解决方案是获取转速，因为 SSD 的转速为 0 rpm，这可能是检测 SSD 驱动器的唯一方法。

Answer 1

来自 google wmi ssd detect

There is an NV cache manager interface used for ReadyDrive which is new to Vista. I think it is testing NV_FEATURE_PARAMETER's NVReadSpeed and NVWrtSpeed values.

Windows 7 detects SSDs by using ATA8-ACS identify word 217: Nominal media rotation rate, with value 0001h as Non-rotating media like solid state devices. But not all SSDs adhere to the ATA8-ACS1 spec section 7.16.7.77, some may need firmware updates.

If you want to lean more about sending ATA commands in Windows, I suggest you to dig aound the Storage Platform ATA forum. This forum is being archived so act quickly.

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也很有启发性:

http://blogs.msdn.com/b/e7/archive/2009/05/05/support-and-q-a-for-solid-state-drives-and.aspx

SSD 上的磁盘碎片整理会默认禁用吗？

Yes. The automatic scheduling of defragmentation will exclude partitions on devices that declare themselves as SSDs. Additionally, if the system disk has random read performance characteristics above the threshold of 8 MB/sec, then it too will be excluded. The threshold was determined by internal analysis.