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(4)
Mode = 1, 0, 0 : Microcode Download, without Saving
In this mode, the controller's microcode or control information is transferred to the IDD's
control memory area. "0" must be specified in the "Buffer ID" field and the "Buffer address"
field.
The "Transfer byte length" field specifies the total number of transfer bytes of data transferred
from the INIT. This value must not exceed X '080000' (524,288 bytes). If a value greater
than X '080000' is specified, a CHECK CONDITION status (ILLEGAL REQUEST [=5] /
Invalid field in CDB [=24-00]) is reported.
When downloading of microcode is completed, the IDD generates a UNIT ATTENTION
condition for all the INITs.
generates sense code.
The IDD operates according to this microcode until its power is switched off. If the power is
switched on again, the IDD's operation returns to the existing microcode saved previously on
the disk.
Note:
Depending on the setting in the IDD, if done using the START/STOP command, it is necessary
to issue the START command after issuing his command. See the description of the motor
starting modes in item 5.3.2 of the "Product Manual" concerning the setting terminal.
(5)
Mode = 1, 0, 1 : Microcode Download, with Saving
In this mode, the controller's microcode or control information is transferred to the IDD's
control memory area and written to the disk. "0" must be specified in the "Buffer ID" field
and the "Buffer address" field.
The "Transfer byte length" field specifies the total number of transfer bytes of data transferred
from the INIT. This value must not exceed X '080000' (524,288 bytes). If a value greater
than X '080000' is specified, a CHECK CONDITION status (ILLEGAL REQUEST [=5] /
Invalid field in CDB [=24-00]) is reported.
When all the data have been received, the IDD writes the new microcode to the disk's system
area and operates in accordance with this microcode until new microcode is downloaded.
Note:
When abnormal termination for reasons other than ILLEGAL REQUEST [=5] / Invalid
field in CDB [=24-00] or ILLEGAL REQUEST [=5] / Invalid field in parameter list [=26-
00] occurs, the IDD indicates that downloading of the new microcode failed, and it is
therefore necessary for the INIT to quickly download the new microcode.
When downloading of microcode is completed, the IDD generates a UNIT ATTENTION
condition for all the INITs except the INIT that issued the WRITE BUFFER command. At
this time, the sense code indicates "Microcode has been changed [=3F-01]."
3 - 126
At this time, the IDD performs microprogram reboot and
C141-E039-01EN
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