From d9eaaf807f10b7f20855e231cb897f21f7876d36 Mon Sep 17 00:00:00 2001
From: Jerry Jacobs <jerry.jacobs@xor-gate.org>
Date: Thu, 19 Dec 2024 20:01:11 +0100
Subject: [PATCH] vault backup: 2024-12-19 20:01:11

---
 .obsidian/workspace.json      | 11 ++++++-----
 2025/xg-infra-upgrade-2025.md | 23 +++++++++++++++++++++++
 2 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 5bff931..3feb15f 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,12 +13,12 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "2024/Gitea build on FreeBSD 14.2.md",
+                "file": "2025/xg-infra-upgrade-2025.md",
                 "mode": "source",
                 "source": false
               },
               "icon": "lucide-file",
-              "title": "Gitea build on FreeBSD 14.2"
+              "title": "xg-infra-upgrade-2025"
             }
           }
         ]
@@ -52,7 +52,7 @@
             "state": {
               "type": "search",
               "state": {
-                "query": "tag: #freebsd  ",
+                "query": "tag: #freebsd  infra",
                 "matchingCase": false,
                 "explainSearch": false,
                 "collapseAll": false,
@@ -73,7 +73,8 @@
               "title": "Bookmarks"
             }
           }
-        ]
+        ],
+        "currentTab": 1
       }
     ],
     "direction": "horizontal",
@@ -164,8 +165,8 @@
   },
   "active": "316987f51496a482",
   "lastOpenFiles": [
-    "2025/xg-infra-upgrade-2025.md",
     "2024/Gitea build on FreeBSD 14.2.md",
+    "2025/xg-infra-upgrade-2025.md",
     "2021/zfs-snapshots.md",
     "2024/So you wanna do FreeBSD 14.1 and native Home Assistant?.md",
     "2024/freebsd-notes.md",
diff --git a/2025/xg-infra-upgrade-2025.md b/2025/xg-infra-upgrade-2025.md
index 649170c..18f22ca 100644
--- a/2025/xg-infra-upgrade-2025.md
+++ b/2025/xg-infra-upgrade-2025.md
@@ -72,6 +72,29 @@ Improvements & things to not forget:
 2. Set zfs-auto-snapshot property (for zfstools) : `zfs set ..`
 3. Create share in Syncthing web GUI
 4. Ignore .zfs folder (to not propagate to connected peers): filter `.zfs`
+
+# ZFS dataset datablock copies
+
+For extra redundancy amount of datablock copies can be set and tested:
+
+```
+# zfs create data/test-dataset/dataset-1
+# zfs list
+# zfs set copies=2 data/test-dataset/dataset-1
+# zfs get copies data/test-dataset/dataset-1
+root@mango:/data/test-dataset/dataset-1 # dd if=/dev/random of=testfile bs=64K count=1024
+1024+0 records in
+1024+0 records out
+67108864 bytes transferred in 0.609759 secs (110058049 bytes/sec)
+root@mango:/data/test-dataset/dataset-1 # ls -lah
+total 131146
+drwxr-xr-x  2 root wheel    3B Dec 19 19:56 .
+drwxr-xr-x  3 root wheel    3B Dec 19 19:55 ..
+-rw-r--r--  1 root wheel   64M Dec 19 19:57 testfile
+root@mango:/data/test-dataset/dataset-1 # zfs list | grep dataset-1
+data/test-dataset/dataset-1   128M   410G   128M  /data/test-dataset/dataset-1
+```
+
 # See also
 
 * [[freebsd-notes]]