Fujitsu MAT3300FC 用户手册

 

C141-C008 

2-19 

• 

Conditions for Reordering: 

If commands which are objects of reordering are issued by an INIT which 
permits reordering together with a SIMPLE QUEUE. 

• 

Commands which are Objects of Reordering:   

READ, READ EXTENDED, WRITE, WRITE EXTENDED 

If the INIT permits command reordering processing, the IDD changes the 
command processing order. It is necessary for the INIT to control concerning the 
validity of data. 

For details of the control mode page, see 4.1.5, “MODE SELECT EXTENDED 
(55)”. 

The Unit Attention condition is a function for notifying the INIT asynchronously 
of events (status changes) which occur in the TARG or logical unit. 

Events which cause the Unit Attention condition to be generated are any of the 
following events. 

(1)  When a Power On, LIP (YX), PRLI or TARGET RESET occurs.  

If the IDD is reset by a power on, LIP (YX), PRLI or TARGET RESET, 
regardless of whether the disk drive is in the ready state or not, the Unit Attention 
condition is generated to all the INITs. 

(2)  Mode parameters changed (if changed by another INIT)  

If any of the following parameters specified by the MODE SELECT or MODE 
SELECT EXTENDED command are changed by any INIT, the Unit Attention 
conditions is generated toward all the INITs except the INIT that changed that 
parameter. 

• 

Parameters related to the data format (block descriptor, page 3: format 
parameter, page 4: any drive parameter) 

• 

Parameters related to the cache segment (page 8: Caching parameter, byte 13) 

• 

Parameters related to command queuing (page A: control mode parameter, 
except the RLEC bit in byte 3) 

• 

Micro code has been changed [=3F-d]