Current status. New laptop hard drive purchased and installed. Experiment 1 Instead of LVM with full disk encryption, have used LVM without full disk encryption. Instead of transferring file to the lv used for DomU '/', have created a new lv mounted with 'mount /dev/xvda3 /mnt' insided DomU to use for transferring data to. Result: 4.9Gb file transferred fine!
Experiment 2 Change from above (1): tried transferring to same lv as DomU's '/' Result: successful transfer. Experiment 3 Change from above (2): LVM with Full Disk Encryption Install package linux-image-3.2.0-0.bpo.4-amd64 from backports.debian.org data transferred to root filesystem. Result: md5sum fails, failure. Experiment 4 Change from above (3): experiment trying to disable barriers, with no luck. Tried booting with rootflags=barrier=0, putting barrier=0 in /etc/fstab. None of these prevented seeing blkfront: xvda2: barriers enabled in the kern.log. Couldn't proceed further. Discussion: file sizes are always correct, which is interesting. Seems that full disk encryption is the culprit. What's next?
