Differences

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--- raid:mdadm:check_the_raid_status [2021/09/13 23:21] – peter
+++ raid:mdadm:check_the_raid_status [2021/09/14 08:41] (current) – peter
@@ Line 15: / Line 15: @@
 <WRAP info>
-**NOTE:**  Details:
+**NOTE:**
-  * **Personalities**:  What RAID level the kernel currently supports.
+  * **Personalities**:  What RAID levels the kernel currently supports.
     * This can be changed by either changing the raid modules or recompiling the kernel.
-    * Possible personalities include: [raid0] [raid1] [raid4] [raid5] [raid6] [linear] [multipath] [faulty] <WRAP info>
+    * Possible personalities include: [raid0] [raid1] [raid4] [raid5] [raid6] [linear] [multipath] [faulty]
-**NOTE:**  **[faulty]** is a diagnostic personality; it does not mean there is a problem with the array.
+      * **[faulty]** is a diagnostic personality; it does not mean there is a problem with the array.
-</WRAP>
+  * **md0**:  The device is /dev/md0.
-The values returned are:
+  * **active**:  The RAID is active and started.
+    * An inactive array is usually faulty. Stopped arrays are not visible here.
-  * **F**:  The drive has failed.
+  * **raid6**:  The type of RAID array and the component devices are:
-  * **U**:  The drive is used and working fine.
+    * **sdf3[0]** is device 0.
-  * **_**:  The drive is unused.
+    * **sdd3[7]** is device 7.
+    * **sdg3[6]** is device 6.
+    * **sdh3[5]** is device 5.
+    * **sdc3[4]** is device 4.
+    * **sdb3[2]** is device 2.
+    * **sda3[3]** is device 3.
+    * **sde3[1]** is device 1.
+      * The order in which the devices appear in this line means nothing.
+  * **46824429696 blocks**:  The usable size of the array in blocks.
+  * **super 1.0**:  The array uses a 1.0 [[https://raid.wiki.kernel.org/index.php/RAID_superblock_formats|superblock]].
+  * **level 6**:  Confirms this is a level 6 array.
+  * **64k chunk**:  Has a chunk size of 64k.
+    * This is the size for 'chunks' and is only relevant to raid levels that involve striping (1,4,5,6,10).
+    * The address space of the array is conceptually divided into chunks and consecutive chunks are striped onto neighboring devices.
+  * **algorithm 2**:  Uses algorithm 2.
+  * **[8/8]**:  The first number is the number of a complete raid devices as defined.  The second number is how many devices are in use.
+  * **[UUUUUUUU]**:  The status of each device.
+    * **F**:  The drive has failed.
+    * **U**:  The drive is used and working fine.
+    * **_**:  The drive is down.
 </WRAP>