Table of Contents
Fix for SCSI BUS errors on 7038-6M2 systems
Original microcode Fix for SCSI BUS errors on 7038-6M2 systems
Before you install the microcode, it is important to determine the microcode level of the Drive installed on the target system. Use the following instructions to read the Microcode Level.
1) List the optical drives attached to the target
systems by typing:
lsdev -Cc cdrom
2) To check the current microcode level for the optical
drive, enter the following command
lscfg -vl cdX
Where X is the number associated with the optical drive listed as available in step 1.
Results of command
Machine Type and Model......DROM0020311
ROS Level and ID............8R23
4.0.1 From the Web
The user should put the RPM file from the IBM website into
the /tmp directory.
The RPM file for this microcode update is called ibm-ide-dvdrom.drom0020311-8R23.rpm
Once the file is in /tmp directory, then to unpack the file by executing following commands:
rpm -ihv --ignoreos ibm-ide-dvdrom.drom0020311-8R23.rpm
The microcode files will be placed in the /etc/microcode/ directory.
The RPM packaged microcode files should be located in the
If the user mounts the CD-ROM disc in the /mnt directory, then execute the following commands to unpack the microcode.
-ihv --ignoreos ibm-ide-dvdrom.drom0020311-8R23.rpm
The microcode files will be copied to "/etc/microcode".
- "/etc/microcode" is a symbolic link to "/usr/lib/microcode".
- If permission does not allow the copy to the above stated directory
or file then the user will be prompted for a new location.
NOTE: Please save current and older versions of the
microcode update files in case you need to restore your system.
Please verify the file size and checksum of the raw microcode files in /etc/microcode/.
To check file size, type these next two commands into the AIX prompt:
ls -l IBM-DROM002031.8R23 File size = 156116
To determine the checksum type these commands into the AIX prompt:
sum IBM-DROM002031.8R23 check sum = 11038
1. Stop all applications and un-mount any file system that is installed on the drive. Media does not have to be removed for the update process to take place.
2. Enter Diagnostics by typing the diag command into the prompt
3. The first screen tells you about Diagnostics. After reading this screen press <enter> to continue
4. Arrow down to the Task Selection is highlighted and press <enter>
5. Arrow down to the Download Microcode is highlighted and press <enter>
6. Select all of the
7. A dialogue box will be display a choice of updating
8. Select "/etc/microcode" and press <enter>.
9. A dialogue box may display on screen if the /etc/microcode does not contain the current microcode found on the device. This is just a warning screen and if the microcode files have the same sum and file size as what is described above, then the this process should work. Also as a last resort, the drive will reject any corrupt microcode trying to be loaded on it. Press <enter> to continue.
10. An "M" will be displayed next to the latest level of microcode in the /etc/microcode directory. Select that level and press <enter>.
11. The following message will appear on the screen when download is completed: "Microcode download complete successfully. The current microcode level for the device cd# is ..... Please run diagnostics on the drive to ensure that it is functioning properly."
12. Verify the microcode levels by repeating process 3.0 Determining Current Microcode Levels.
13. Run diagnostics to make sure the devices are in working order.