diff --git a/servers/puppet/modules/humbug/files/postgresql/setup_disks.sh b/servers/puppet/modules/humbug/files/postgresql/setup_disks.sh
index 8fb0b08ed0..a44b423d7a 100755
--- a/servers/puppet/modules/humbug/files/postgresql/setup_disks.sh
+++ b/servers/puppet/modules/humbug/files/postgresql/setup_disks.sh
@@ -1,9 +1,13 @@
 #!/bin/sh
 umount /mnt
 yes | mdadm --create /dev/md0 --raid-devices=2 --level=1 /dev/xvdb /dev/xvdc
+
 blockdev --setra 4096 /dev/xvdb
 blockdev --setra 4096 /dev/xvdc
 blockdev --setra 4096 /dev/md0
+echo deadline > /sys/block/xvdb/queue/scheduler
+echo deadline > /sys/block/xvdc/queue/scheduler
+
 mkfs.xfs /dev/md0
 echo "/dev/md0   /srv  xfs    noatime,barrier 1 1" >> /etc/fstab
 mount /srv