Differences

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--- raid [2009/08/27 09:14] – 172.26.0.166
+++ raid [2009/09/29 13:49] – 172.26.0.166
@@ Line 1: / Line 1: @@
-=== HPC RAID array ===
+===== RAID =====
-The storage on the HPC is using a RAID array. (Level?)
+We have two RAIDs on the HPC
+  * Linux kernel software RAID
+  * 3mware hardware RAID
-It is currently reporting a degraded array:
+===== Software RAID =====
+It is currently reporting a degraded array (27 Aug 2009):
 <code>#cat /proc/mdstat
@@ Line 18: / Line 23: @@
       20971008 blocks 256k chunks
-unused devices: <none><code>#
+unused devices: <none></code>
+=== To Do list: ===
+Prepare written instructions on how to repair disk arrays.
+What disks to we have?
+Add extra spare disks?
+How do you know which physical disk is broken to replace it?
+===== Hardware RAID =====
+There is a utility, tw_cli, which can be used to control the hardware raid.
+The storage on the HPC is using a RAID array. (Level?)
+Study the output of ''show'' to know which controller to manage.  Then you can use ''/c1 show'' to show the status of that particular controller.
+Remove the faulty port:
+<code>maint remove c1 p5</code>
+Insert a new drive and rescan:
+<code>maint rescan</code>
+<code>maint rebuild c1 u2 p5</code>