DCHS_63B

Microcode level 63B enables "Auto Read Reallocation" feature of drive, and disables soft error reporting. These changes enhances reliability of drive by automatic reallocation of marginally bad blocks(sectors) during read the operation, and prevent unnecessary drive replacement as result of soft (correctable) read errors.

Disk Drives Affected:

This microcode is for use in the following IBM 4.5/9.1GB SCSI hard disk drive:

DASD P/N     FRU P/N      Drive Model   Microcode level                Description
------------       ----------      ------------        ------------------       ------------------------------------
93G3159       76H2697       DCHS04U      63A or below    4.5 GB Fast,Wide, Ultra-Single-Ended
93G2854       93G2970       DCHS04W     63A or below    4.5 GB Fast,Wide,Single-Ended
93G3160       76H2698       DCHS09U       63A or below      9.1GB Fast,Wide,Ultra, Single-Ended
93G3064       27H1677       DCHS09X       63A or below      9.1GB Fast,Wide,Differential
93G2863       93G2972       DCHS09W      63A or below      9.1GB Fast,Wide,Single-Ended

The microcode upgrade will bring up to the current level which is 63B

Machines Affected:

All RISC/6000 (all 70xx types), 7204 and 7131 machine types using these hard disk part numbers.

Operating System levels supported:

All levels of AIX that this product was announced on.

Determine the Current Microcode level:

To see the drive type and current microcode level, Execute the following command:

lscfg -vl hdisk* |pg

Example of the info on a 4.5GB Fast,Wide,Ultra,Single-Ended hard disk:

DEVICE LOCATION DESCRIPTION

hdisk2 10-68-00-13,0 16 Bit SCSI Disk Drive (4500 MB)

Manufacturer.........................IBM
Machine Type and Model......DCHS04U
FRU Number........................76H2697
ROS Level and ID................36343634
Serial Number.......................680456C9
EC Level..............................488638
Part Number........................93G3159
Device Specific.(Z0)............000002029F00003E
Device Specific.(Z1)............RAMR6063
Device Specific.(Z2)............09RI
Device Specific.(Z3)............97100
Device Specific.(Z4)............0001
Device Specific.(Z5)............22
Device Specific.(Z6)............E29611

If the data returned in the "Part Number" field matches the one listed above AND the "Device Specific.(Z1)...." field of that data is: "RAMUR26A", "RAMUR26B", "RAMUR26C", "RAMUR26D", "RAMR6060", "RAMR6063", "RAMR6063A", then this microcode will apply. If this level is already installed then the "DEVICE SPECIFIC.(Z1)...." will show: "RAMR663B"

Downloading and Unpacking the Firmware Update Package From WEB

a) Make a directory on an AIX system to receive the AIX format file.

Enter: mkdir /tmp/fwupdate

Note: If the directory /tmp/fwupdate already exists, make sure it is empty before proceeding.

b) Transfer the AIX format file to the /tmp/fwupdate directory (using "Save as ...").

You'll see the filename is dchs_63b.bin

c) Unpack the file by executing the instructions below. You will be asked for the password from the license agreement.

pass = **RS/6000**

Enter the commands:

cd /tmp/fwupdate

chmod +x dchs_63b.bin

./dchs_63b.bin

[Don't overlook the periods (.) in the above command.]

The directory dchs_63bfw with these files will be added to /tmp/fwupdate.

DCHS04U.A090061A.00020041
DCHS04W.A090061A.00020041
DCHS09U.A090061A.00020041
DCHS09X.A090061A.00020041
DCHS09W.A090061A.00020041
dchs_63b.txt

Note: dchs_63b.txt is a read me file(same as this file), it can be saved or printed for future use.

Enter the following command to copy the microcode files to " /etc/microcode " directory :
cp /tmp/fwupdate/dchs_63bfw/DCHS* /etc/microcode

Follow the procedure below to copy these file onto two diskettes:
Note: Don't overlook the complete path of microcode files, microcode download will not work if files are not copied with complete path onto the diskette.

Diskette 1:
Enter command
ls /etc/microcode/DCHS04*41 | backup -ivf /dev/rfd0
This will produce AIX backup diskettes. Label the diskettes:
" DCHS 4.5GB Microcode Level 63b"

Diskette 2:
Enter command:
ls /etc/microcode/DCHS09*41 | backup -ivf /dev/rfd0
This will produce AIX backup diskettes. Label the diskettes:
" DCHS 9.1GB Microcode Level 63b"

SCSI Hard Disk Drive Microcode Download Procedure

Warning: Do not power off the system or the drive during microcode download as this may permanently damage the disk drive

Caution: The microcode download process is nondestructive to the hard disks; however, as a precaution, ensure that a backup operation has been performed on the affected systems PRIOR to the microcode installation.

Can microcode be installed Concurrently?
If the disk is part of rootvg, microcode download can ONLY be performed in service mode using diagnostics CD. If disk is not part of rootvg, microcode download can be performed cuncurrently as long as drive is not in use.

Is system reboot needed to activate the microcode: Yes

Installation Time: Approximately 30 minutes CE Time; Approximately 15 minutes System Time

Procedure:
1. Properly shutdown the system.
2. Boot up the system in SERVICE mode with the CDROM diagnostics(Use diagnostics level 4.21 or above; It is recommended to use the same level of
Diagnostic CD as the AIX ).
3. Select the "Task Selection" from diagnostics menu.
4. Select "Microcode Download" from "Task Selection" menu.
5. Select hard disk drive (disk) that needs to be updated from the list of devices.
6. Select "diskette" as the Input device, Select "latest" as the Microcode level to download, Select "YES" to the question whether to download microcode even if present level is missing on the media (the diskette does not have the level that is loaded on the disk).
NOTE: A prompt will ask you to insert the microcode diskette into the floppy drive. Insert the diskette which accompanies these instructions. If this level is already installed in the drive you've selected a message will let you know. A message will also come up because the diskette does not have the previous level microcode on the diskette. This is true and is not required to complete the download. Hit enter to continue.
7- The following microcode files are included in the diskette:

P/N           FRU P/N       Model        Microcode File Name
--------     ----------    -------   ------------------------------
93G3159       76H2697      DCHS04U       DCHS04U.A090061A.00020041
93G2854       93G2970      DCHS04W     DCHS04W.A090061A.00020041
93G3160       76H2698      DCHS09U       DCHS09U.A090061A.00020041
93G3064       27H1677      DCHS09X       DCHS09X.A090061A.00020041
93G2863       93G2972      DCHS09W       DCHS09W.A090061A.00020041

8. The following message will appear on the screen when download is completed: "The microcode download has completed successfully".
9. Return to the Tasks Selection menu and repeat this procedure for each hard disk that requires this microcode.

NOTE: The code takes effect immediately but VPD is not updated. ROS info will not indicate the change until the system is power cycled

10. Exit diagnostic and reboot system in normal mode.