如何区分USB硬盘驱动器和USB闪存驱动器？

Question

In Windows, you can get GetDriveType return value to determine USB Hard Disk Drive or USB flash drive.

DRIVE_REMOVABLE ==> USB flash drive

DRIVE_FIXED ==> USB Hard Disk Drive

How should I do it in linux?

how should I do it from a developer's point of view ?

Answer 1

You need to install lshw command using apt-get or yum command. To display all disks and storage controllers in the system, enter:

# lshw -class disk -class storage

later you can also try the following, it will give complete details for particular...

# hdparm -I /dev/sda

OR

$ sudo hdparm -I /dev/sda

Answer 2

Well, there is a "removable" flag implemented as a file underneath `/sys but....

For example, on my system, this file underneath /sys represents disk /dev/sde implemented by an attached USB hard disk (the USB device found on "bus 1 -> port 2 -> config 1 -> interface 0")

/sys/devices/pci0000:00/0000:00:02.1/usb1/1-2/1-2:1.0/host9/target9:0:0/9:0:0:0/block/sde

The subpath

/sys/devices/pci0000:00/0000:00:02.1/usb1/1-2

which is the USB device found on "bus 1 -> port 2" seems to represent the USB device itself.

Let's look for the "removable" files using find and print their contents using cat :

$ cd /sys/devices/pci0000:00/0000:00:02.1/usb1/1-2

$ find . -name removable -exec echo -n '{}: ' ";" -exec cat '{}' ";"

./1-2:1.0/host9/target9:0:0/9:0:0:0/block/sde/removable: 0
./removable: unknown

So, the "device" is not known to be removable, and the "disk" is not removable (assuming '0' means 'no'). Not very helpful.