Summary

On Windows, IOCountersWithContext calls DeviceIoControl with IOCTL_DISK_PERFORMANCE for each fixed drive. If the call fails with any error, the function immediately returns, discarding all IO counters collected so far — including those from drives that succeeded.

This causes disk.IOCounters() to fail entirely on systems where at least one drive does not support IOCTL_DISK_PERFORMANCE, such as:

• Virtual drives (e.g. Google Drive mounted as a disk letter) — reported in disk.IOCounters() returns ERROR_INVALID_FUNCTION when Google Drive is mounted as a disk in Windows. #1461
• Windows Server 2016 with disk performance counters disabled (default configuration)

Fix

Skip drives that return ERROR_INVALID_FUNCTION or ERROR_NOT_SUPPORTED from DeviceIoControl and continue to the next drive. This matches the behavior of Python's psutil, which this code references:

// psutil/arch/windows/disk.c
else if (GetLastError() == ERROR_INVALID_FUNCTION) {
    psutil_debug("DeviceIoControl -> ERROR_INVALID_FUNCTION; ignore PhysicalDrive%i", devNum);
    goto next;
}
else if (GetLastError() == ERROR_NOT_SUPPORTED) {
    psutil_debug("DeviceIoControl -> ERROR_NOT_SUPPORTED; ignore PhysicalDrive%i", devNum);
    goto next;
}

Reference: https://github.com/giampaolo/psutil/blob/544e9daa4f66a9f80d7bf6c7886d693ee42f0a13/psutil/arch/windows/disk.c#L146-L163

Fixes #1461