Primary partitions do not have enough disk

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Alison wrote in with this question recently: "I currently have two iSeries Model 825's that each have a primary partition and several secondary partitions. We are running V5R2 of the operating system, and I'm about to upgrade my secondary partitions to V5R3. My issue is that my primary partitions do not have enough disk or memory to go to V5R3 (35gb mirrored)so I was hoping I could just upgrade the secondary ones for now and move to new I5?s at the end of the year." Do you see any problems with the Primary being back a level in the OS? -- Debra Tart, associate editor, Search400.com
ASKED: December 21, 2005  4:25 PM
UPDATED: September 16, 2010  7:23 AM

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As long as you stay on the 825 and go no higher than V5R3 you should have no problems… then when the new i5 comes in your primary goes away… so there is no extra work required. The rule for LPARS is supposed to be one level up and one level down from the primary for any secondaries… (as long as the hardware supports it) ie: when you get to the i5 nothing can be lower than V5R3. Just as a little note… a lot of the cards in the 825 WON”T be able to be used in the i5 either so do your homework on hardware as well.

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  • CarterC19
    I have done exactly this on occasion, with a 825, with no apparent ill effects. Typically, I have a test partition where I perform my PTF and OS upgrades before performing same on any other partitions, just to get a feel for the process, some timing experience, weeding out any media errors, etc. I typically apply upgrades and PTFs to my managing partitions last, in fact, but in my case it is destined to be a temporary (i.e. matter of weeks or couple months max) situation.
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  • TomLiotta
    I can't make sense of the question. The OP has "...a primary partition and several secondary partitions." The use of the term "several" confuses things. It's confusing because "...my primary partitions do not have enough disk or memory to go to V5R3 (35gb mirrored)." First, are they two mirrored 35GB drives? Four mirrored 17GB drives that present 35GB usable capacity? Two mirrored 17GB drives to add up to '35GB' total? (Four 8GB drives that get kind of close to 35GB?) But regardless of how it's added up, why isn't 35GB sufficient? V5R3 can install on 8GB drives. I have two systems with V5R3 on 8GB drives. One has 24GB total for the system. So... what's the actual problem? BTW, the general rule is a primary can support secondaries at +- 2 releases, not one. There are some restrictions for certain combinations of hardware and releases, where particular hardware might only support certain available releases. Tom
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