VM creation from DVD fails with checksum errors, works from iso.

[sdrake]

Creation of SLES11 SP2 vm from mounted DVD fails with random checksum errors on packages read from DVD, yet the installation works from mounted iso image of same DVD.  The same DVD has been used to build multiple physical servers with no error.  Burning another DVD does not help.  We use autoyast for unattended installation with autoinst.xml on usb stick.  Note:  The DVD drive used for vm installation is the same drive that was used to create the DVD.  This trouble has been experienced by everyone at our location who has tried to create a SLES11 SP2 vm from DVD in vmplayer.  They are all using different hardware and different DVD's. This worked fine with SLES10 SP2, SP3, SP4, and SLES11 SP1. Any ideas?

[sdrake]

The autoinst.xml file is also on the DVD and the same checksum errors occur when using the file:///<path to autoinst.xml boot option.

[sdrake]

Seems that CD/DVD Legacy Emulation (in advanced tab for CD/DVD device) fixes this - at least it has worked twice in a row using this option when it would never work previously.  Hardware is HP DL380 G7 with HP slimline SATA CD/DVD writer and HP ML370 G5 with HP half-height DVD writer.  VMPlayer is version 5.0.1 build-894247 - it also failed with version 4.

[sdrake]

It would be nice to know why Legacy Emulation is required.  What's legacy about HP ML380G7 with SATA CD/DVD writer?

[continuum]

Legacy emulation is often required with WS 9 or VMplayer 5.
Looks like something in the code was changed with the new version.
Older WS 8 or VMplayer 4 rarely had to use "legacy emulation"

Legacy emulation makes your fancy super duper DVD/CD drive look like a cheap generic device and that way the chances that the guest will detect it are way higher as without.