In the System Information window, under the I/O tab, the Read/Write Bytes Delta values normally have a unit (KB) following them. For the values in the 'Disk' section, they can vanish if the number becomes large (5-6 digits). This does not seem to happen in the other sections even with similarly large values.
I've attached four screenshots in sequence showing what happens before during and after a disk transfer. Note how the 'KB' units on the lower right vanish, then reappear later. Additionally note that this does not happen in the I/O section at the lower left even though the values rise to similar values.
![75152-picture-1.png][1]![75162-picture-2.png][2]![75163-picture-3.png][3]![75164-picture-4.png][4] [1]: /answers/storage/attachments/75152-picture-1.png [2]: /answers/storage/attachments/75162-picture-2.png [3]: /answers/storage/attachments/75163-picture-3.png [4]: /answers/storage/attachments/75164-picture-4.png
