# $Id: tstVDDiscard.vd 39520 2011-12-02 21:17:42Z vboxsync $
#
# Storage: Testcase for discarding data in a disk.
#

#
# Copyright (C) 2011 Oracle Corporation
#
# This file is part of VirtualBox Open Source Edition (OSE), as
# available from http://www.virtualbox.org. This file is free software;
# you can redistribute it and/or modify it under the terms of the GNU
# General Public License (GPL) as published by the Free Software
# Foundation, in version 2 as it comes in the "COPYING" file of the
# VirtualBox OSE distribution. VirtualBox OSE is distributed in the
# hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
#

# Init I/O RNG for generating random data for writes
iorngcreate size=10M mode=manual seed=1234567890

print msg=Testing_VDI
# Create disk containers, read verification is on.
createdisk name=disk verify=yes
# Create the disk.
create disk=disk mode=base name=tstCompact.vdi type=dynamic backend=VDI size=2G
# Fill the disk with random data
io disk=disk async=no mode=seq blocksize=64k off=0-2G size=2G writes=100
# Read the data to verify it once.
io disk=disk async=no mode=seq blocksize=64k off=0-2G size=2G writes=0
close disk=disk mode=single delete=no

open disk=disk name=tstCompact.vdi backend=VDI async=yes discard=yes
printfilesize disk=disk image=0
discard async=yes disk=disk ranges=6,0M,512k,1M,512k,2M,512k,3M,512k,4M,512k,5M,512k
discard async=yes disk=disk ranges=6,6M,512k,7M,512k,8M,512k,9M,512k,10M,512k,11M,512k
discard async=yes disk=disk ranges=1,512k,512k
printfilesize disk=disk image=0

print msg=Discard_whole_block
discard async=yes disk=disk ranges=1,20M,1M
printfilesize disk=disk image=0

print msg=Split_Discard
discard async=yes disk=disk ranges=1,21M,512k
printfilesize disk=disk image=0
discard async=yes disk=disk ranges=1,22016k,512k
printfilesize disk=disk image=0

# Cleanup
close disk=disk mode=single delete=yes
destroydisk name=disk

# Destroy RNG and pattern
iorngdestroy