LD TRACE LDan:

 	This command initializes the trace buffer for the specified
 	device. This buffer will log the following data for every
 	I/O request:

 	  o	Process ID
 	  o	Logical block number
 	  o	I/O request size
 	  o	I/O Function code
 	  o	I/O status block
 	  o	Timestamp from the start of the I/O request
 	  o	Timestamp from the end of the I/O request

 	The default size is 512 entries, the maximum is as big
 	as pool will allow.

 	The allocated size from pool will be:

 		PoolSize (in Bytes) = (N * 88) + 12

 	where N equals the number of entries.