Differences

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--- freenas:replace_a_drive [2020/12/21 18:25] – peter
+++ freenas:replace_a_drive [2020/12/21 18:45] (current) – peter
@@ Line 25: / Line 25: @@
 <code bash>
 zpool status Pool1
+</code>
+returns:
+<code bash>
   pool: Pool1
- state: ONLINE
+ state: DEGRADED
-  scan: scrub repaired 0B in 21:56:57 with 0 errors on Sun Dec 20 21:56:57 2020
+status: One or more devices has experienced an unrecoverable error.  An
+    attempt was made to correct the error.  Applications are unaffected.
+action: Determine if the device needs to be replaced, and clear the errors
+    using 'zpool clear' or replace the device with 'zpool replace'.
+   see: http://illumos.org/msg/ZFS-8000-9P
 config:
@@ Line 34: / Line 43: @@
 	  raidz1-0                                      ONLINE       0     0     0
 	    gptid/2d35e96c-b611-11ea-be33-00d861fcb7d8  ONLINE       0     0     0
-	    gptid/2d41dcbd-b611-11ea-be33-00d861fcb7d8  ONLINE       0     0     0
+	    gptid/2d41dcbd-b611-11ea-be33-00d861fcb7d8  ONLINE       0     0    40  too many errors
 	    gptid/2ddb5cb2-b611-11ea-be33-00d861fcb7d8  ONLINE       0     0     0
@@ Line 42: / Line 51: @@
 <WRAP info>
 **NOTE:**  This shows the disks within the Pool.
+It also shows that device 2d41dcbd-b611-11ea-be33-00d861fcb7d8 has errors.
 </WRAP>
+----
+===== Determine the actual disk connected to that device =====
+<code bash>
+glabel status | grep 2d41dcbd
+</code>
+returns:
+<code bash>
+gptid/2d41dcbd-b611-11ea-be33-00d861fcb7d8     N/A  ada3p2
+</code>
+<WRAP info>
+**NOTE:**  This shows that the disk is **/dev/ada3**
+</WRAP>
+----
+===== Determine the Serial Number of the Disk =====
+<code bash>
+sudo camcontrol identify ada3 | grep serial
+</code>
+returns:
+<code bash>
+serial number         ZL21DEPA
+</code>
+----
+  * Power off the system.
+  * Pull the failed drive and replace it with a new drive.
+  * Reboot.
+  * Navigate back and find the OFFLINE disk.
+  * <WRAP info>
+**NOTE:**  It will be the one with a series of numbers rather than a device name, and click the **Replace** button and select the new device (should be the only one on the list).
+Since this drive is entirely new and unpartitioned, you'll need to force the replacement.
+After that, it's just a matter of sitting back while the volume performs the resilver operation.
+</WRAP>
+----
+===== Estimate how long it will take to resilver =====
+<code bash>
+zpool status -v Pool1
+</code>
+returns:
+<code bash>
+  pool: Pool1
+ state: ONLINE
+tatus: One or more devices is currently being resilvered.  The pool will
+    continue to function, possibly in a degraded state.
+action: Wait for the resilver to complete.
+  scan: resilver in progress since Wed Jan 12 12:34:19 2014
+.3G scanned out of 15.85T at 592M/s, 8h12m to go
+.4G resilvered, 9.82% done
+config:
+	NAME                                            STATE     READ WRITE CKSUM
+	Pool1                                           ONLINE       0     0     0
+	  raidz1-0                                      ONLINE       0     0     0
+	    gptid/2d35e96c-b611-11ea-be33-00d861fcb7d8  ONLINE       0     0     0
+	    gptid/11111111-b611-11ea-be33-00d861fcb7d8  ONLINE       0     0     0  (resilvering)
+	    gptid/2ddb5cb2-b611-11ea-be33-00d861fcb7d8  ONLINE       0     0     0
+errors: No known data errors
+</code>
+<WRAP info>
+**NOTE:**  Notice the resilvered disk has a new id, starting 11111111, which will differ as it is a different disk.
+</WRAP>
+----