diff --git a/setup_drives.sh b/setup_drives.sh
index c66bd86..5def89e 100644
--- a/setup_drives.sh
+++ b/setup_drives.sh
@@ -22,11 +22,11 @@
 
 apt-get update && \
 apt-get install -y bcache-tools && \
-sudo dd if=/dev/zero if=/dev/sdb bs=512 count=8 && \
-sudo dd if=/dev/zero if=/dev/sdd bs=512 count=8 && \
+dd if=/dev/zero if=/dev/sdb bs=512 count=8 && \
+dd if=/dev/zero if=/dev/sdc bs=512 count=8 && \
 wipefs -a /dev/sdb && \
-wipefs -a /dev/sdd && \
-make-bcache -C /dev/sdd -B /dev/sdb --discard --writeback && \
+wipefs -a /dev/sdc && \
+make-bcache -C /dev/sdb -B /dev/sdc --discard --writeback && \
 mkfs.ext4 /dev/bcache0 && \
 mkdir /mnt/bcache && \
 mount /dev/bcache0 /mnt/bcache && \