I'm trying to extract the 7z file for Teradata Express 14.10 and it keeps complaining of a corrupted sda.vmdk file. I've tried a few other versions of Teradata Express and get the same error.
I've seen similar errors when trying to extract to a FAT32 filesystem, after extracting the first two GBs :-)
I was extracting to NTFS in Windows 8.1 using both 7zip and WinRar. I finally was able to get a program on OS X to extract it but VMware reported that the disk was corrupted.