R3.1 install fails on Lenovo T420s: Can't mount root filesystem

[Brendan]

I have a Lenovo T420s (4174W2F). I was able to install Qubes R2 from a DVD without a hitch. However, when attempting to install R3.1 the process fails with a series of messages of the form:

[ xx.xxxxxx] dracut-mount[787]: mount: /dev/mapper/live-rw: can't read superblock

followed by:

[ xx.xxxxxx] dracut-mount[787]: Warning: Can't mount root filesystem

I have attached the rdsosreport.txt. Please let me know if there's any other data that would be useful, and thanks for your help.

[Marek Marczykowski-Górecki]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

It looks like the installation image is incomplete. Note that Qubes 3.1
installation image do not fit on single-layer DVD, nor 4GB usb stick.
You need either double-layer DVD, or larger USB stick.

- --
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2

iQEcBAEBCAAGBQJXijCGAAoJENuP0xzK19csbjcH/jmwCBZah/KX5p32zgiCb6BT
jczpxL/0D7ucAJTRkuj9vis2VVZ2OnRelVRJeTpr6wWlDQXUqAgbrAnZzKvmQ8GQ
a0aK7pztKfzcjnNC+pHd/aE3L1oYUnBl8U3gnkiuXl2xKSOTA8+9LH+Os0XkRskP
SStoMrW6ay7GTEGlUUPNHN3qO6IGhbCTSPgpUYppHCr1pAnuEK+Sety/Jz9DHg7b
Zplh+a8O68HCGZBGl7w01BTkSAIfvssQ4K31E3n2e76l1IjOwhQ2XZGWSGhDrUc1
WO0ubxCS+dBNNXtK/yno4d4T6iAcpJRXV3sYrlEkUTs3QyHh0j7uY0Ag8HPoTO8=
=OzQ1
-----END PGP SIGNATURE-----