#!/usr/bin/env sh

# https://www.tekrevue.com/tip/how-to-create-a-4gbs-ram-disk-in-mac-os-x/

# diskutil erasevolume zfs 'RAM Disk' `hdiutil attach -nomount ram://2097152`

PATH=$HOME/bin:/usr/local/bin:$PATH

TMPDIR=$HOME/tmp

TMPFILE=$TMPDIR/ramdisk.info

case "$1" in

start)

DEVDISK="$(hdiutil attach -nomount ram://2097151 2>&1)"

# /dev/disk1

rm -f $TMPFILE

echo "$DEVDISK" > $TMPFILE

sudo zpool create RamDisk $DEVDISK

sudo chown -R $(whoami) /Volumes/RamDisk

# cp -rf /Users/x/Documents/RamDisk/x /Volumes/RamDisk/

rsync -a /Users/x/Documents/RamDisk/ /Volumes/RamDisk

;;

stop)

rsync -a --delete /Volumes/RamDisk/x/ ~/Documents/RamDisk/x

sudo zpool destroy RamDisk

hdiutil detach $(cat "$TMPFILE")

;;

status)

hdiutil info

zpool status

;;

restart)

stop

start

;;

condrestart)

if test "x`pidof anacron`" != x; then

stop

start

fi

;;

*)

echo $"Usage: $0 {start|stop|restart|condrestart|status}"

exit 1

esac

# sudo zfs create zfs001/p1

# sudo zfs set mountpoint=/Volumes/RamDisk zfs001/p1