Checklist 11: Upgrade load source disk unit with device parity protection

This checklist shows the sequence of tasks to upgrade your load source disk unit (unit 1) with a disk unit that has at least a 17-GB capacity while keeping device parity active. The units that are replaced in this procedure are discarded.

Print a copy of this checklist. Check off the configuration tasks as you perform them. This checklist provides an important record of your actions. It may help you diagnose any problems that occur.

Before you begin

Evaluate your disk configuration and record your answers. The information entered in the Before you begin table is needed to answer the questions in the Load source planning sections.

Table 1. Disk configuration questions
Disk configuration questions	Disk configuration answers
How many disk units are in the parity set that contain the load source disk unit? Note: The parity set will contain between 3-18 disk units.
Where are the disk units in the parity set that contain the load source disk unit located? Note: It is recommended that you print the graphical view of the device parity set or optionally mark the disk units in the parity set. Make sure that you can identify the load source unit separately from the other disk units.
How many replacement disk units do you have? Note: You need a minimum of three disk units with the same capacity.

Load source planning steps

Answer the questions below. If you answer Yes to all of these questions, you can perform the Load source disk unit upgrade. However, if you answer No to any of the questions, call your next level of support to perform this upgrade.

Table 2. Load source planning steps
Load source planning steps	Planning requirements answers
Does your load source disk unit (unit 1) have device parity protection?	Yes / No
Are there enough open slots to install your replacement units? Note: The number of slots must be at least the same number of open slots as the number of disk units that you have in the parity set that contain the load source. It must also be under the IOA that contains your load source disk unit (unit 1).	Yes / No
Do you have equal or more replacement disk units than the number of disk units in the device parity set that contain the load source disk unit?	Yes / No
Do you know how to physically install and remove disk units from your system? Install and remove replacement units on an IBM^® iSeries™ server. Install and remove replacement units on an IBM eServer™ i5.	Yes / No
Do you have iSeries Navigator or know how to find the physical location of disk units on your system? You will need to know this information in several tasks below.	Yes / No
The load source upgrade will require multiple hours to complete. Make sure that you schedule the upgrade during a time frame when the system can be unavailable to perform normal system activities. Do you have time to perform the load source upgrade?	Yes / No

Load source disk unit upgrade

Note: If problems occur that are not described in this procedure, contact your next level of support.

Task	What to do
1.___	Back up your server using the GO SAVE command.
2.___	Turn off your system or logical partition by entering the following command. PWRDWNSYS IMMED RESTART(NO) The Power Down System (PWRDWNSYS) command prepares the system to end. Use the immediate (IMMED) value to end all active jobs immediately and use the RESTART (NO) value to power off the system so that you can install disk units in the next task.
3.___	Install the replacement disk units. Ensure that there are enough open disk slots under the IOA that contain the load source disk unit (unit 1). Install replacement units on your system. Note: Ensure that the disk units being installed have the same capacity as one another and that each disk unit has at least a 17-GB capacity. It is recommended that you mark these disk units with tape to remember their location. Mark these disk units differently than how you marked the existing disk units.
4.___	Work with Dedicated Service Tools (DST). Power on your system or logical partition to Dedicated Service Tools (DST). Note: Verify that you are in manual mode before you power on your system.
5.___	Start device parity on the replacement disk units, and select the type of RAID protection that you want. On the Use Dedicated Service Tools (DST) menu, select Work with disk units On the Work with Disk Units display, select Work with disk configuration. On the Work with Disk Configuration display, select Work with device parity protection. On the Work with Device Parity Protection display, select Start device parity protection. You may select RAID 5 or RAID 6 protection. Note: RAID 6 protection requires special hardware. If your hardware does not meet the requirements, it will default to RAID 5 protection. Type a 1 in the Option column of the storage subsystems that will have device parity protection. You are shown the Confirm Starting Device Parity Protection display. The display shows all the disk subsystems that you have selected and the individual disk units that are eligible to be started. Disk units that have an asterisk () in the ASP and Unit columns are not yet configured. Verify that these disk units are the ones installed in task 3 and that the ASP and unit number all have an asterisk (). Press the Enter key to continue. After you have verified that these disk units are the replacement units that you installed in task 3, press the Enter key, to start device parity protection. This procedure continues to run until it is complete. The status display shows how the operation is proceeding. When the function is complete, return to the Use Dedicated Service Tools (DST) menu.
6.___	Add the non-configured disk units into the auxiliary storage pools. On the Use Dedicated Service Tools (DST) menu, select Work with disk units. On the Work with Disk Units display, select Work with disk configuration. On the Work with Disk Configuration display, select Work with ASP configuration. On the Work with ASP Configuration display, select Add units to ASPs. Note: Add all but one of your disk units. The disk unit that remains unconfigured will be used as your load source in task 9. Decide which ASP will include the new disk units. Type this ASP number beside each of the new units on the screen and press Enter. On the Confirm Add Units display, press Enter. The status display shows how the operation is proceeding. When the function is complete, return to the Use Dedicated Tools (DST) menu.
7.___	Locate the load source disk unit (unit 1) and all other disk units in the parity set that you will be upgrading. On the Use Dedicated Service Tools (DST) menu, Select Work with disk units. On the Work with Disk Units display, Select Work with disk configuration. On the Work with Disk Configuration display Select Display disk configuration. On the Display Disk Configuration display Select Display device parity status. Note: If the status on the disk units in the parity set does not say Active, do not continue with this procedure. Contact the next level of support. Find the parity set that contains the load source disk unit (unit 1). Record the disk units that are in its parity set. Your load source disk unit (unit 1) is already recorded for you. Recording this information is helpful for the next step. Note: There could be up to 18 disk units. \|__1__\|_____\|_____\|_____\|_____\|_____\|_____\|_____\|_____\| \|_____\|_____\|_____\|_____\|_____\|_____\|_____\|_____\|_____\| Return to the Use Dedicated Service Tools (DST) menu.
8.___	Remove the disk units that were recorded in task 7, step 6 from the configuration. On the Use Dedicated Service Tools (DST) menu Select Work with disk units. On the Work with Disk Units display, select Work with disk configuration. On the Work with Disk Configuration display, select Work with ASP configuration. On the Work with ASP Configuration display, select Remove units from configuration. Type a 4 next to each disk unit that you want to remove from the configuration. Select the disk units that were recorded in task 7, step 6 and press Enter. Note: You will not be able to select load source disk unit (unit 1). You will remove the load source in task 11. On the Confirm Remove disk units display, press Enter . The status display shows how the operation is proceeding. When the function is complete, return to the Use Dedicated Service Tools (DST) menu.
9.___	Copy the load source disk unit (unit 1) to one of the replacement disk units that you installed in task 3. On the Use Dedicated Service Tools (DST) menu, select Work with disk units. On the Work with Disk Units display, select Work with disk unit recovery. On the Work with Disk Unit Recovery display, select Copy disk unit data. Type 1 next to load source disk unit (unit 1) and press Enter. Type 1 next to one of the disk units that you installed in task 3. Determine the location of the replacement load source unit. Open the iSeries Navigator Service Tools Window. Right-click All Disk Units and choose Graphical View. Find the disk unit with the serial number listed above, and note the location of that unit. Write down the serial number of the replacement unit that is going replace the load source. \|_________\| Note: This information in iSeries Navigator and is needed for task 14. On the Confirm Copy Disk Unit Data display, press Enter . The status display shows how the operation is proceeding. When the function is complete, return to the Use Dedicated Service Tools (DST) menu.
10.__	Turn off the system or logical partition. Note: This task is critical. Follow the directions thoroughly. On the Use Dedicated Service Tools (DST) menu, select Start a service tool. On the Start a Service Tool display, select Operator panel functions. Use function F10 to power off the system and press Enter. Note: There is no command line because you are using Dedicated Service Tools.
11.__	Physically remove the disk units. Physically remove the disk units that you recorded in task 7, step 6, and the load source disk unit (unit 1). Note: You can identify which disk units are you removing from printout of the graphical view on your iSeries navigator or from the disk units that you marked.
12.__	Move the replacement disk unit. Move the replacement disk unit that contains the load source information into the slot where the old load source disk unit (unit 1) originally resided.
13.__	Work with Dedicated Service Tools (DST). Power on your system or logical partition to Dedicated Service Tools (DST).
14.__	Examine the configuration. On the Use Dedicated Service Tools (DST) menu, select Work with disk units. On the Work with Disk Units display, select Work with disk configuration . On the Work with Disk Configuration display, select Display disk configuration. On the Display Disk Configuration display, select Display disk configuration status. Examine the configuration information to ensure that the load source disk unit (unit 1) is one of the replacement disk units that you installed in task 3. Verify that the load source serial number matches the number that you wrote in task 9, step 7.
15.__	IPL your system to i5/OS™.

If this procedure has been completed correctly, your load source will be upgraded and device parity protection will be active.

Start of change If this procedure has not been completed correctly, contact your next level of support. End of change