From 5053f962743ae607a9384a67bb16682aff90b7cc Mon Sep 17 00:00:00 2001
From: Alexander Stuart-Kregor <592657+easkay@users.noreply.github.com>
Date: Tue, 13 Mar 2018 13:17:49 +0000
Subject: [PATCH] Swap max_hw_sectors_kb for max_sectors_kb. Fixes #5633.
 (#5638)

---
 docs/deployment/kernel-tuning/disk-tuning.sh | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/docs/deployment/kernel-tuning/disk-tuning.sh b/docs/deployment/kernel-tuning/disk-tuning.sh
index 9d8771079..9b53671e4 100644
--- a/docs/deployment/kernel-tuning/disk-tuning.sh
+++ b/docs/deployment/kernel-tuning/disk-tuning.sh
@@ -14,6 +14,8 @@
 ## See the License for the specific language governing permissions and
 ## limitations under the License.
 
+# This script changes protected files, and must be run as root
+
 for i in $(ls -d /sys/block/*/queue/iosched 2>/dev/null); do
     iosched_dir=$(echo $i | awk '/iosched/ {print $1}')
     [ -z $iosched_dir ] && {
@@ -42,7 +44,7 @@ for i in $(ls -d /sys/block/*/queue/iosched 2>/dev/null); do
     ## This is the maximum number of kilobytes
     ## supported in a single data transfer at
     ## block layer.
-    [ -f $path/max_hw_sectors_kb ] && {
-        echo "1024" > $path/max_hw_sectors_kb
+    [ -f $path/max_sectors_kb ] && {
+        echo "1024" > $path/max_sectors_kb || true
     }
 done