Quantum ATL SuperLoader ATL, User Manual

Page: 191 / 196

Chapter 3 Media Changer Commands
Write Buffer Command (3Bh)
Quantum ATL SuperLoader Software Interface Guide 173
Download
Microcode Mode
(0100b)
3
Using buffer offsets, the host can download the firmware image
into the target’s buffer in pieces. These commands do not cause the
new image to become active. A Download and Save Mode WRITE
BUFFER command must be issued for the image to become active.
Any error on a WRITE BUFFER command causes any downloaded
image data to be discarded and the download must be restarted
from the beginning.
Download
Microcode and
Save Mode (0101b)
3
This mode is used to download and save the entire image at once,
or to download the image and save it, or to cause a save operation
after the image data has been downloaded using the Download
Microcode mode (without the Save).
This mode of the WRITE BUFFER command causes the image data
to be verified and the Flash EEPROM firmware area to be updated.
During the reprogramming front panel displays progress
information. Also, when it is updating the Flash, it disconnects
from the SCSI bus and will not respond until the update is
complete and the system has reset.
Write Data to Echo
Buffer (1010b)
3
In this mode the drive transfers data from the application client
and stores it in an Echo Buffer. The Buffer ID and Buffer Offset
fields are ignored in this mode. Upon successful completion of a
WRITE BUFFER command the data shall be preserved in the Echo
Buffer unless there is an intervening command to write the Echo
Buffer or the device is reset in anyway.
Caution:
During the actual reprogramming of the FLASH
EEPROM, if any type of powerfail occurs, or if the
reprogramming fails before completion, the
SuperLoader subsystem may become unusable and
the unit must be replaced.