From a4d3efba7dc61869704a97d298f677e83303e71a Mon Sep 17 00:00:00 2001
From: Michele Cereda <cereda.michele@gmail.com>
Date: Wed, 17 Jul 2024 18:31:01 +0200
Subject: [PATCH] chore: reserved blocks in linux

---
 .../set reserved blocks on filesystems.md     | 23 +++++++++++++++++++
 snippets/filesystems.sh                       |  7 ++++++
 2 files changed, 30 insertions(+)
 create mode 100644 knowledge base/set reserved blocks on filesystems.md
 create mode 100644 snippets/filesystems.sh

diff --git a/knowledge base/set reserved blocks on filesystems.md b/knowledge base/set reserved blocks on filesystems.md
new file mode 100644
index 0000000..41498c6
--- /dev/null
+++ b/knowledge base/set reserved blocks on filesystems.md	
@@ -0,0 +1,23 @@
+# Set reserved blocks on filesystems
+
+```sh
+# EXT
+tune2fs -m 1 /dev/sdXY
+tune2fs -r numOfBlocks device
+
+# XFS
+xfs_io -x -c 'resblks' '/path/to/fs'
+```
+
+## Sources
+
+- [Reserved space for root on a filesystem - why?]
+- [How to determine the reserved blocks in XFS filesystem?]
+
+<!--
+  Reference
+  ═╬═Time══
+  -->
+
+[how to determine the reserved blocks in xfs filesystem?]: https://lore.kernel.org/all/CAJtCNH2irjpu3T57XPHPXHZ0FXm7V-diaA4g3DtjAmcRV2xmWA@mail.gmail.com/T/
+[reserved space for root on a filesystem - why?]: https://unix.stackexchange.com/questions/7950/reserved-space-for-root-on-a-filesystem-why
diff --git a/snippets/filesystems.sh b/snippets/filesystems.sh
new file mode 100644
index 0000000..0b00334
--- /dev/null
+++ b/snippets/filesystems.sh
@@ -0,0 +1,7 @@
+#/usr/bin/env sh
+
+# Get the *sector* size of partitions in 512-byte sectors
+sudo blockdev --getsz '/dev/nvme0n1p1'
+
+# Get the *block* size of partitions
+sudo blockdev --getbsz '/dev/nvme0n1p1'