IBASE Technology IB981AF-C226 User Manual page 68

BIOS Setting
Device reset
time-out
Device power-up
delay
60
Description
Seconds of delaying execution of start unit
command to USB mass storage device.
The maximum time the device will take
before it properly reports itself to the Host
Controller.
"Auto" uses default value for a Root port it is
100ms. But for a Hub port, the delay is taken
from Hub descriptor.
IB981 User's Manual