Date: Sun, 24 Jul 2011 23:18:39 -0700 (PDT) From: Joe Sciulli <jsciulli2003@yahoo.com> To: freebsd-emulation@freebsd.org Subject: mount vdi Message-ID: <1311574719.49706.YahooMailClassic@web122313.mail.ne1.yahoo.com> In-Reply-To: <20110721081726.GR17489@deviant.kiev.zoral.com.ua>
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Is it possible to mount virtualbox vdi file on the FreeBSD host? This appears to be doable on windows and linux hosts, which basically is done in two steps: 1. find offset in the image. 2. mount the image with that offset. I'm trying to do the same thing on FreeBSD, and found the undocumented and deprecated command still works: VBoxManage internalcommands dumphdinfo freebsd_home.vdi I got the following for the virtual disk image holding the /home (no root hence no MBR) disk for a FreeBSD guest: Header: offBlocks=4096 offData=28672 But since the mount command in FreeBSD doesn't support "offset", I have to dd the image into another file. I believe the default "block" size in dd is 512 bytes, so the offset 28672 (bytes?) is 56 blocks. So I used the command: dd skip=56 if=freebsd_home.vdi of=freebsd_home_56.vdi Then attempt to mount it: mdconfig -a -t vnode -f /tmp/freebsd_home_56.vdi -u 0 mount /dev/md0 /tmp/aaa/ mount -t cd9660 /dev/md0 /tmp/aaa/ unfortunately both the above two mount commands failed with "Invalid argument". I tried skip=28672 to no avail as well. Anything did I do wrong? Or is there any other solution in FreeBSD host to mount virtualbox vdi file? There appears to be a "vdfuse" but is not ported yet, and the attempt to port appears to be not for VirtualBox 4.
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