I want to get disk type (SSD or HDD) in QT. I’ve checked QStorageInfo but I could not find anything useful for my purpose. By the way I need a solution that’s work on both Windows and Linux.
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Answer
For linux, you can tell whether the kernel has detected a SSD disk by reading special file
/sys/block/<disk>/queue/rotational
For instance, cat /sys/block/sda/queue/rotational writes 1 if sda disk is HDD and 0 if it’s SSD.
For Windows, you can open a drive by opening special file \.PhysicalDrive<number>, for instance \.PhysicalDrive0. It can the be used with DeviceIOControl to query properties, using IOCTL_STORAGE_QUERY_PROPERTY IO control. It seems StorageDeviceSeekPenaltyProperty may be what you’re after, as HDD have a seek penalty while SSD don’t. Alas I don’t have a windows environment around to test right now.
For portability, I highly doubt such system-dependent information is available in a portable way. You’ll have to use #ifdef/#else/#endif macros to select an implementation depending on current target.