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Ticket Resolution Summary Owner Reporter
#3195 duplicate Compact VDI in 2.1.2 still not working. pcmedic
Description

Trying to compact a VDI and I get:

C:\Program Files\Sun\xVM VirtualBox>vboxmanage modifyhd c:\docs\virtualbox\vdi\winxp.vdi compact
VirtualBox Command Line Management Interface Version 2.1.2
(C) 2005-2009 Sun Microsystems, Inc.
All rights reserved.

Error: Shrink hard disk operation is not implemented!

C:\Program Files\Sun\xVM VirtualBox>

I know a work around but this function should work if the docs say that it is implemented in this version.

#13405 worksforme Compact of fixed-size VDI broken soliver84
Description

Hi, I just broke a set of shared VDI disks.

I was running out of diskspace so i thought it would be a good idea to compact my fixed-size shared disks. Well its not.

I was able to execute the modifyhd --compact command successfull for the fixed-size disks.

Writing to the disks is not persistent anymore.

This is how you can reproduce the bug:

Tested with Ubuntu 14.04 on Windows7 x64 Hosts

Scenario 1: Create Fixed Disks VDI, compact VDI, create partition table, create FS.

Scenario 2: Create Fixed Disks VDI, create partition table, create FS, compact VDI.

  1. Create Disks

1- "C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" createhd --filename TEST1.vdi --size 256 --format VDI --variant Fixed

2- "C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" createhd --filename TEST2.vdi --size 256 --format VDI --variant Fixed

1- "C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" modifyhd TEST1.vdi --type writethrough --compact

2- "C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" modifyhd TEST2.vdi --type writethrough

  1. Attach Disks to VM

1- TEST1.vdi -- /dev/sdb

2- TEST2.vdi -- /dev/sdc

  1. Create partition tables

1- creation of Partiontable failed. fdisk -l /dev/sdb returns nothing.

2- OK

  1. Poweroff vm
  1. Compact TEST2.vdi

2- "C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" modifyhd TEST2.vdi compact

-> Size of VDI ~ 36MB

  1. Start VM

2-

root@1404:~# mount /dev/sdc1 /mnt

root@1404:~# cp /dev/urandom /mnt/out.rnd

cp: Fehler beim Schreiben von »/mnt/out.rnd“: Auf dem Gerät ist kein Speicherplatz mehr verfügbar

cp: »/mnt/out.rnd“ konnte nicht erweitert werden: Auf dem Gerät ist kein Speicherplatz mehr verfügbar

root@1404:~# md5sum

md5sum md5sum.textutils

root@1404:~# md5sum /mnt/out.rnd

60cae031f9476b3b22767881cee55c29 /mnt/out.rnd

root@1404:~# ls -ls /mnt/out.rnd

250817 -rw-r--r-- 1 root root 255832064 Sep 16 10:04 /mnt/out.rnd

  1. Poweroff VM
  1. Check size of VDI File in Hosts

==> STILL ~36MB !!!!!

  1. Startup VM

root@1404:~# mount /dev/sdc1 /mnt

root@1404:~# ls -ls /mnt/out.rnd

ls: Zugriff auf /mnt/out.rnd nicht möglich: Datei oder Verzeichnis nicht gefunden

==> File not found

Cheers Oliver

#11210 obsolete Compacting a writethrough or multiattach disk makes the virtual machines inaccessible askox
Description
  1. Edit and then zerofree a writethrough or multiattach disk
  2. Do not detach from machines
  3. VBoxManage modifyhd --compact
  4. Open VirtualBox. The machines have become inaccessible. showhdinfo reports that the disk is now in normal mode.

Whenever you do hdinfo or modifyhd --type, and open VirtualBox within 5 seconds, the machines will be accessible. If you do hdinfo or modifyhd --type, and open VirtualBox after 5 seconds, the machines will be inaccessible.

Batch Modify
Note: See TracBatchModify for help on using batch modify.
Note: See TracQuery for help on using queries.

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