Append SSD scheduler script to /etc/rc.local

rc_local_ssd_noop

declare -ar SSDS=(
    'ata-M4-CT064M4SSD2_000000001133031876A3'
    'ata-M4-CT064M4SSD2_000000001133031876AB'
    'ata-M4-CT064M4SSD2_000000001133031876AC'
    'ata-M4-CT064M4SSD2_000000001133031876AF'
    'ata-M4-CT064M4SSD2_000000001133031876B6'
    'ata-M4-CT064M4SSD2_0000000011500324D5AC'
    'ata-M4-CT064M4SSD2_0000000011500324D60C'
    'scsi-SATA_M4-CT064M4SSD2_000000001133031876A3'
    'scsi-SATA_M4-CT064M4SSD2_000000001133031876AB'
    'scsi-SATA_M4-CT064M4SSD2_000000001133031876AC'
    'scsi-SATA_M4-CT064M4SSD2_000000001133031876AF'
    'scsi-SATA_M4-CT064M4SSD2_000000001133031876B6'
    'scsi-SATA_M4-CT064M4SSD2_0000000011500324D5AC'
    'scsi-SATA_M4-CT064M4SSD2_0000000011500324D60C'
)

for SSD in "${SSDS[@]}" ; do
  BY_ID=/dev/disk/by-id/$SSD

  if [[ -e $BY_ID ]] ; then
    DEV_NAME=`ls -l $BY_ID | awk '{ print $NF }' | sed -e 's/[/\.]//g'`
    SCHED=/sys/block/$DEV_NAME/queue/scheduler

    if [[ -w $SCHED ]] ; then
      echo noop > $SCHED
    fi
  fi
done