From ec073aac0e2d4b6be264a4a3b95d29eea0c117d1 Mon Sep 17 00:00:00 2001
From: coesensbert <coesensb@incubaid.com>
Date: Sat, 30 Dec 2023 23:21:13 +0100
Subject: [PATCH] really really clean a disk

---
 reallycleandisk.sh | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 reallycleandisk.sh

diff --git a/reallycleandisk.sh b/reallycleandisk.sh
new file mode 100644
index 0000000..b01cfe5
--- /dev/null
+++ b/reallycleandisk.sh
@@ -0,0 +1,30 @@
+#!/usr/bin/bash 
+set -x
+
+DISK=${1:-nodisk}
+
+if [ "x${DISK}" = "xnodisk" ]; then
+  echo "What disk ? (sda, sdb, nvme0n1,...)"
+  exit 1
+fi
+
+SIZE=$(sudo blockdev --getsz /dev/${DISK})
+PBSZ=$(sudo blockdev --getpbsz /dev/${DISK})
+SEEK=$(($SIZE - 256 * 1024 * 2 / $PBSZ)) 
+LEN=$((256 *2 *1024 /$PBSZ))	
+# SEEK=$(( $(sudo blockdev --getsz "/dev/sdX1") -  256 * 1024 * 2 / $(sudo blockdev --getpbsz "/dev/sdX1")))
+echo $SIZE $PBSZ $SEEK $LEN
+for i in 1 2 3 4 ; do
+  TOWIPE=${DISK}${i}
+  if [ -b /dev/$TOWIPE ] ; then
+    sudo wipefs -a -f /dev/${TOWIPE}
+    sudo  dd if=/dev/zero of=/dev/${TOWIPE} bs=$PBSZ count=$LEN 
+    sudo  dd if=/dev/zero of=/dev/${TOWIPE} seek=$SEEK bs=$PBSZ count=$LEN 
+  fi
+done
+
+
+
+sudo wipefs -a -f /dev/${DISK}
+sudo  dd if=/dev/zero of=/dev/${DISK} bs=$PBSZ count=$LEN 
+sudo  dd if=/dev/zero of=/dev/${DISK} seek=$SEEK bs=$PBSZ count=$LEN