From 0b3eb8db5af2c80f9d9a37e12aae14df3d31324a Mon Sep 17 00:00:00 2001
From: Sthope <rjs.ricardosilva@gmail.com>
Date: Sat, 14 May 2022 13:33:28 +0200
Subject: [PATCH] first commit

---
 docs/cmnds/hdd.md | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 docs/cmnds/hdd.md

diff --git a/docs/cmnds/hdd.md b/docs/cmnds/hdd.md
new file mode 100644
index 0000000..a8ef960
--- /dev/null
+++ b/docs/cmnds/hdd.md
@@ -0,0 +1,33 @@
+# Harddrive's commandline tests
+
+### Test Write Speed
+
+```
+sync; dd if=/dev/zero of=tempfile bs=1M count=1024; sync
+```
+
+### Test Read Speed
+
+```
+dd if=tempfile of=/dev/null bs=1M count=1024
+```
+
+Clear Cache and read speed from hdd:
+
+```
+sudo /sbin/sysctl -w vm.drop_caches=3;dd if=tempfile of=/dev/null bs=1M count=1024
+```
+
+### Using hdparm
+
+Install:
+```
+sudo apt-get update; \
+sudo apt-get upgrade -y; \
+sudo apt-get install -y hdparm
+```
+
+Run (replace PWD with sudo password):
+```
+echo PWD | sudo -S hdparm -Tt /dev/sda
+```