Random Read (0x0020)
Performs random read I/O from the device.
Parameters
- function
- 0x0020 – read request.
- parameter0
- Specifies the number of units to be read.
- parameter1
- Specifies the logical unit number of the beginning
unit.
- parameter2
- Not used.
- bufferLength
- The size of the buffer (the number of units multiplied
by the unit size) in bytes, or the number of elements in the scatter/gather
buffer.
- buffer
- Points to a buffer in memory where the data is to
be read or it points to a scatter/gather list of buffers
(see Scatter/Gather
List .