From 65522b83c7ecb3297b3aac460b4c5c802d783e6f Mon Sep 17 00:00:00 2001
From: Randy Bush <randy@psg.com>
Date: Sun, 30 Apr 2023 08:45:22 -0700
Subject: [PATCH] from private stash

---
 pages/MegaRaidReplace.md | 64 ++++++++++++++++++++++++++++++++++++++++
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+# Replace Megaraid Drive
+
+[One set of hints at this URL](http://lucasbrasilino.com/posts/how-to-add-a-new-disk-as-hot-spare-with-megacli/)
+[Though I preferrend this one](htLtps://www.thomas-krenn.com/en/wiki/Managing_an_MegaRAID_Controller)
+[another Cheat Sheet](https://www.advancedclustering.com/act_kb/replacing-a-disk-with-megacli/)
+
+on vm1.sea, a megaraid controller on a cisco ucs, i want to remove phys disk 9, [24:10], which is currently an array member but smart says is dying
+
+```
+-- ID  | Type | Drive Model              | Size     | Status          | Speed    | Temp | Slot ID  | LSI ID | Path
+c0u0p9 | HDD  | 9XF0TKYHST9500620NS CC02 | 464.7 Gb | Online, Spun Up | 6.0Gb/s  | 32C  | [24:10]  | 17
+```
+
+and replace with phy disk phys disk 12, [24:13], a new drive, [installed as hot spare and spun up](https://wikitech.wikimedia.org/wiki/MegaCli)
+
+```
+-- ID  | Type | Drive Model              | Size     | Status            | Speed    | Temp | Slot ID  | LSI ID | Path
+c0uXpY | HDD  | 9XF21BHBST9500620NS SN03 | 464.7 Gb | Hotspare, Spun Up | 6.0Gb/s  | 29C  | [24:13]  | 20     | N/A
+```
+
+i was not completely comfortable with removing [24:10] from the array and causing it to fail over to the hot spare on [24:13].   [reading](https://support.siliconmechanics.com/portal/en/kb/articles/replace-failed-drive-using-megacli)
+i try
+
+```
+megacli -PDOffline -PhysDrv [24:10] -a0
+```
+and it will fall over to the hot spare magically?  then
+
+```
+megacli -PDMarkMissing -PhysDrv [24:10] -a0
+```
+
+and set for removal
+
+```
+megacli -PDPrpRmv -PhysDrv [24:10] -a0PDPrpRmv
+```
+
+remove the drive, insert the new one and mark as hot spare
+
+```
+megacli -PDHSP -PhysDrv [24:10] -a0PDPrpRmv
+```
+
+Blinky Blinky
+
+```
+megacli -PdLocate -start -PhysDrv [24:0] -a0
+```
+
+Add to array
+```
+megacli -PDOnline -PhysDrv [24:2] -a0
+```
+
+Make hot spare
+```
+megacli -PDMakeGood -PhysDrv [24:2] -a0
+megacli -PDHSP -Set -PhysDrv [24:2] -a0
+```
+
+---
+
+2023.04.30
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