Remember - as our plans go from low to high the number of sites hosted on each Hybrid VPS drop. This means that our pricing isn't
just about disk space, or number of domains.
For example a Diamond Plan may be appropriate for twenty small sites, or for one large site that gets many page views per day.
We have groups of servers where each grouping has less customers on each server. The highest
Disk Space is shown based on servers having higher end 10,000RPM and 15,000RPM drives. Unlike most hosting companies who use "Psychological Marketing" and offer amounts of space a Drupal site would never be able to use, we try to provide real world numbers that 95%+ of users will be under.
Plans are geared towards fast drive access, not large amounts of slow consumer grade disk. The reality of the situation is that a 146GB 15000RPM hard drive costs a significant amount more than a 2GB 7200 RPM drive. Attaching drives locally in a RAID array for fast SQL access costs significantly more than hanging a bunch of cheap drives off a NAS/SAN.
SSH is available upon request and Drush will work with our service.