Upgrading the 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 70-GB capacity while keeping device parity active. The disk 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 configuration by following the steps in Evaluating the current configuration, and record your answers. The information that is entered in the table that is labeled Disk configuration questions, is needed to answer the questions in the Load source planning sections.
Disk configuration questions | Disk configuration answers |
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1. 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.
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2. 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 parity set or optionally
mark the disk units in the parity set. Make sure that you can identify
the load source disk unit separately from the other disk units.
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3. How many replacement disk units do you have? Note: You
need a minimum of three disk units with the same capacity.
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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.
Load source planning steps | Planning requirements answers |
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Does your load source disk unit (unit 1) have device parity protection? | Yes / No |
Are there enough open slots to install your replacement disk units? | Yes / No |
Do you know how to physically install and remove disk units from your system? | Yes / No |
Do you have IBM Navigator for i 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
Task | What to do |
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1.___ | Back up your system using the GO SAVE command. |
2.___ | Turn off your system or logical partition by entering the following
command. 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.
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4.___ | Work with Dedicated Service Tools (DST).
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5.___ |
Start device parity on the replacement disk units, and select the type of RAID protection that you want.
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6.___ |
Add the non-configured disk units into the auxiliary storage pools.
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7.___ |
Locate the load source disk unit (unit 1) and all other disk units in the parity set that you will be upgrading.
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8.___ |
Remove the disk units from the configuration. You recorded the units in Task 7, Step 6.
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9.___ | Turn off the system or logical partition. Note: This task is critical. Follow the directions thoroughly.
Note: There is no command line because you are using Dedicated Service Tools.
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10.__ | Use the HMC to change the I/O tag.
Note: The changes that you make only go into effect when the partition is shut down and then
activated again.
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11.__ | Work with Dedicated Service Tools (DST).
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12.__ |
Copy the load source disk unit (unit 1) to one of the replacement disk units that you installed in Task 3.
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13.__ | Turn off the system or logical partition. Note: This task is critical. Follow the directions thoroughly.
Note: There is no command line because you are using Dedicated Service Tools.
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14.__ | Physically remove the disk units.
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15.__ | Work with Dedicated Service Tools (DST).
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16.__ | Examine the configuration.
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17.__ | IPL your system to IBM i. |
If this procedure has been completed correctly, your load source will be upgraded and device parity protection will be active.
If this procedure has not been completed correctly, contact your next level of support.